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Nanda Devi

Nanda Devi is a prominent mountain peak in the Garhwal Himalaya range of , northern , rising to an elevation of 7,816 metres (25,643 ft), which qualifies it as the highest summit entirely within Indian territory and the second-highest in the country after Kanchenjunga. The peak, revered in Hindu tradition as the abode of the goddess , a manifestation of , holds deep religious significance for local communities who conduct pilgrimages and festivals in its honor. Its dramatic isolation within a ring of subsidiary peaks forms the core of the Nanda Devi Sanctuary, a UNESCO-recognized biosphere reserve encompassing diverse alpine ecosystems and rare biodiversity, though access has been restricted since 1983 primarily due to ecological degradation from prior mountaineering activities and waste accumulation. The mountain's climbing history includes its first successful ascent on 29 August 1936 by British mountaineers H. W. Tilman and Noel E. Odell via the southwest ridge, a feat that highlighted its technical challenges and remote position amid steep ice walls and avalanche-prone slopes. Subsequent expeditions faced high risks, contributing to the sanctuary's closure to preserve fragile habitats supporting species like and . A notable controversy arose from a 1965 joint U.S.- operation during the , in which climbers attempted to install plutonium-powered surveillance devices on the peak to monitor Chinese nuclear tests, but avalanches led to the loss of the radioactive capsules, prompting environmental concerns over potential contamination in the headwaters of the River and influencing the decision to ban access. Recent proposals in 2025 to partially reopen the area for regulated trekking underscore ongoing debates between conservation needs and .

Geography and Physical Features

Location and Topography

Nanda Devi is situated in the of state in northern , within the . Its summit coordinates are 30°22′33″N 79°58′15″E. The mountain rises to an elevation of 7,816 meters (25,643 feet), making it the highest peak located entirely within India's borders. The of Nanda Devi features a prominent, isolated with steep, sheer faces that contribute to its striking profile. It exhibits a of 3,139 meters (10,299 feet), ranking it among the world's most prominent peaks. The peak forms part of a twin summit structure, with Nanda Devi East at 7,434 meters connected via a rocky ridge. Nanda Devi occupies the center of the Nanda Devi Sanctuary, a high-altitude glacial encircled by a formidable ring of subsidiary peaks and ridges, many exceeding 6,000 meters in height. This natural amphitheater creates a pronounced , with access limited to narrow, glacier-choked passes such as the Rishi Nala gorge. The surrounding terrain includes deeply incised valleys, alpine meadows at lower elevations, and extensive snow and ice fields that feed tributaries of the River system.

Geology and Glaciation

The Nanda Devi massif forms part of the Higher Himalayan Crystalline sequence in the Garhwal-Kumaon sector, dominated by granitic gneisses, augen gneisses, and calc-silicate rocks within the Main Central Thrust zone. These lithologies reflect high-grade metamorphism during the Miocene, resulting from crustal thickening and anatexis amid the ongoing India-Eurasia collision, which initiated around 50 million years ago and continues to drive uplift rates exceeding 5 mm per year in the region. The peak's steep topography arises from differential erosion of these sheared, banded metamorphic units, with tectonic fabrics like foliation and lineations oriented northeast-southwest, parallel to the Himalayan arc. Glaciation on Nanda Devi is pronounced above 4,300 meters, where perennial snowfields and valley glaciers mantle the slopes, contributing to the mountain's isolation within a ring of peaks via the Nanda Devi Sanctuary's glacial cirque. The Dakshini Nanda Devi Glacier descends southwest from the west summit, while the Nanda Devi group encompasses seven interconnected glaciers—Bartoli, Kururntoli, Nanda Devi North, Nanda Devi South, Nandakna, and others—covering an aggregate area of several square kilometers and feeding tributaries of the Ganges system, including the Rishi Ganga and Dhauliganga rivers. Observational data from and field surveys indicate snout retreat in the Nanda Devi region, with eight monitored glaciers in the upper Ganga catchment showing an average recession of 10-20 meters per year from the to , varying by and ; northern aspects exhibit slower retreat due to shading and nourishment. This differential response correlates with localized warming of 0.1-0.2°C per decade and reduced winter , though some supraglacial lakes have expanded, heightening risks. A notable glacio-tectonic occurred on February 7, 2021, when a rock-ice from a hanging near Rauntholi, upstream of the Uttari Nanda Devi , dislodged approximately 27 million cubic meters of material, propagating a down the Ganga valley and destroying . The failure plane involved fractured gneissic bedrock weakened by progressive shearing, underscoring interactions between glacial undercutting and tectonic instability.

Cultural and Religious Significance

Role in Hindu Mythology

In Hindu tradition, Nanda Devi is revered as a manifestation of the goddess , the consort of and daughter of the (Himavan), embodying the sacred feminine energy () associated with the mountain's peak. Local legends portray her as a princess of divine origin who, pursued by an unwanted suitor—often depicted as an Afghan prince or foreign king—fled into the and merged her form with the summit to evade capture, thereby sanctifying the mountain as her eternal abode. This union symbolizes her protective role over the region, where she is invoked as the patron deity of Uttarakhand's Kumaon and Garhwal divisions, granting bliss (nanda) to devotees while wielding fierce aspects akin to against threats. Mythological narratives further describe Nanda Devi as a benevolent force of renewal, credited in ancient tales with mitigating a great that submerged the by providing refuge and to the Himalayan valleys below. Her often links her to , portraying the mountain as a site of their cosmic play (), where the deity's presence ensures ecological and spiritual harmony, though her wrath is feared for natural calamities like avalanches if desecrated. These stories, rooted in regional oral traditions rather than canonical , underscore her as a localized emphasizing the ' sanctity, distinct from broader pan-Hindu depictions of but aligned with Devi's multifaceted nature as nurturer and warrior.

Local Worship and Pilgrimages

The goddess Nanda Devi is revered as the kuldevi (clan deity) and patron protector of local communities in the Garhwal and Kumaon regions of Uttarakhand, particularly among the Bhotiya tribe, an ethnic Tibetan group historically engaged in trans-Himalayan trade. Worship practices include annual rituals such as the Bikhoti festival in Lata village, where Bhotiya performers don ritual dance masks to honor the goddess during the month of Baisakh (April-May), invoking her blessings for prosperity and protection. Temples dedicated to Nanda Devi, such as those in Almora and scattered across the central Himalayas, host fervent observances during Navratri, featuring processions, offerings, and communal feasts to affirm her role in safeguarding the mountainous terrain and its inhabitants. The preeminent expression of devotion is the Nanda Devi Raj Jat Yatra, a cyclical pilgrimage conducted every 12 years, symbolizing the goddess's symbolic departure from her maternal Garhwali home to unite with Shiva at Kailash. Originating over 500 years ago in Garhwal folklore, the yatra commences from Nauti village in Tehri Garhwal district and spans approximately 280 kilometers through high-altitude meadows and passes, culminating at Hom Kund near the Roopkund Lake, a site linked to sacrificial rituals. The procession, led by a sacred four-horned ram and a silver palanquin carrying the goddess's idol, involves thousands of pilgrims, priests, and performers traversing treacherous terrain over three weeks, typically in August or September, with rituals including animal sacrifices, folk dances, and forest dedications to divine entities for ecological stewardship. Local participation underscores communal bonds, with and other hill tribes contributing hereditary roles like pallbearers and musicians, while the event reinforces cultural continuity amid environmental challenges in the Nanda Devi region. The most recent yatra occurred in 2014, with the next scheduled for 2026, drawing participants who view it as the "Himalayan " for its scale and spiritual intensity. These practices persist as vital to indigenous identity, integrating devotion with seasonal migration patterns historically tied to alpine pastures.

Early Exploration and First Ascent

Pre-20th Century Surveys

The of India, commenced in 1802 under British auspices, encompassed early systematic measurements of Himalayan peaks, including Nanda Devi, through from distant baseline stations. Initially regarded as the world's highest mountain based on preliminary observations, Nanda Devi's preeminence was challenged by 1808 computations establishing Dhaulagiri's superior elevation. Surveyors employed theodolites and angular observations across vast distances, accounting for and curvature of the , to compute heights without proximate access, which was impeded by the peak's remote Garhwal location and encircling topography. From 1816 to 1820, William Webb conducted detailed surveys in the Kumaon region, yielding a height for Nanda Devi—locally termed Peak XIV—of 25,669 feet (7,824 m), an estimate deviating by merely 7 meters from contemporary GPS-derived figures of 7,817 m. This precision stemmed from chained series linking coastal baselines to Himalayan vistas, corroborated by multiple observation points. The GTS also delineated a formidable ring of subsidiary peaks, such as Nanda Kot and Changuch, forming an impassable barrier around the central summit, a feature first mapped in these efforts and later termed the Nanda Devi Sanctuary. Subsequent refinements occurred under Surveyor Generals like (1830–1843), who oversaw observations from stations in the Dun Valley and between 1808 and 1840, adjusting for barometric variations and refining the peak's prominence at approximately 25,643 feet. These surveys prioritized empirical over exploratory forays, though incidental reconnaissance by officials like G.W. Traill in 1830 provided ethnographic notes on local Garhwali access routes, which remained culturally restricted. Direct approaches, such as W.W. Graham's 1883 attempt via the Rishi Ganga Valley, yielded partial sketches but failed to breach the inner ring, underscoring the surveys' reliance on remote methods for verifiable data.

1936 Expedition and Success

The 1936 British-American Himalayan Expedition aimed to achieve the of Nanda Devi, the highest in the at 7,816 meters. Organized jointly by climbers from the and the , the team was led by H. W. Tilman and comprised Noel E. Odell and from , along with Americans Charles S. Houston, Adrian G. Carter, Peter R. Lloyd, W. F. Loomis, and A. B. Emmons III. The group assembled at , , on July 6, 1936, with extensive gear transported by lorries to the trailhead at Garur, where local Dotial porters were engaged for the march to base camp. Access to the mountain required navigating the formidable Rishi Ganga gorge, a narrow canyon first penetrated by and Tilman in 1934, leading into the isolated Nanda Devi Sanctuary. The expedition established a base camp at approximately 3,700 meters in the Sanctuary, followed by advanced camps along the southwest , which featured steep snow, ice cliffs, and mixed rock terrain. Challenges included heavy monsoon rains delaying progress, logistical strains with and local porters carrying loads up to 25 kilograms each, and technical difficulties in fixing ropes on vertical ice sections rising over 100 feet. Support teams, including and , managed lower camps to ferry supplies, enabling the summit push. On August 29, 1936, Tilman and Odell departed from Camp VI at around 7,200 meters, traversing the final under clear conditions to reach the at approximately 3 p.m. The pair spent about an hour on top, confirming no higher human achievement prior, as Nanda Devi surpassed previous records like those from in 1931. Descent to Camp VI followed immediately, with the full team evacuating the mountain by early September amid worsening weather. Tilman's detailed account in the emphasized the route's viability for future climbs while noting the peak's isolation and technical demands. The success elevated standards, demonstrating effective international collaboration and high-altitude in the pre-oxygen era.

Geopolitical Expeditions and Nuclear Incident

1965 CIA-India Mission Objectives

The 1965 CIA-India mission, conducted under the auspices of Project 397, sought to install a covert -powered station on the summit of Nanda Devi to intercept intelligence on China's burgeoning and missile programs. Prompted by China's inaugural atomic test on , 1964, at the Lop Nor facility, the operation addressed U.S. needs for reliable ground-based monitoring after aerial options like U-2 overflights proved vulnerable following shoot-downs over Soviet and Chinese territory. The primary objective centered on deploying a compact device weighing approximately 35 kilograms, powered by a radioisotope thermoelectric generator (RTG) known as a unit, equipped with sensitive antennas and receivers to capture radio signals from missile tests conducted roughly 300 miles northward. These signals would disclose critical parameters such as missile trajectories, payload capacities, and compatibility with nuclear warheads, enabling evaluations of China's progress toward intercontinental ballistic capabilities and overall arsenal sophistication. Nanda Devi's selection stemmed from its unparalleled height of 7,816 meters within undisputed borders, offering unobstructed line-of-sight while minimizing risks of detection or incursion by forces. The joint effort with India's Intelligence Bureau facilitated transport via experts, driven by New Delhi's post-1962 border war incentives to counter shared threats from through reciprocal data access, though the mission's secrecy precluded broader governmental acknowledgment at the time.

Mission Failures and Lost Device

In October 1965, a team of mountaineers from the Intelligence Bureau, supported by the CIA, attempted to install a plutonium-powered (RTG) atop Nanda Devi to establish a remote telemetry station for monitoring Chinese nuclear tests at . The device, weighing approximately 80 pounds and designed for long-term operation without battery replacement, was transported via a multi-stage ascent involving fixed ropes and camps up to 22,000 feet. A severe struck during the push toward the summit, halting progress at around 25,000 feet and preventing further advancement; the team secured the RTG to the mountain face with ropes before descending for safety. Upon return, the climbers discovered that an , likely triggered by the storm's heavy snowfall, had severed the securing lines, sending the device tumbling into a deep or down the glacier-covered slope, rendering it irretrievable at that location. No immediate human casualties were reported from the incident, but the loss compromised the mission's core objective of establishing high-altitude overlooking territory. Recovery operations commenced in , involving additional expeditions with specialized equipment to probe crevasses and scan for signatures, but yielded no results amid the unstable terrain and persistent weather hazards. Further searches through the late , including seismic monitoring and climber teams, similarly failed to locate the RTG, which declassified assessments indicate remains lost within the Nanda Devi system, potentially encased in with gradual movement toward lower elevations over decades. The device's core, estimated at several kilograms, was engineered for heat generation rather than , but its unrecovered status has prompted ongoing concerns about environmental containment in the fragile Himalayan ecosystem.

Mountaineering Achievements and Challenges

Post-1936 Climbs and Records

The second successful ascent of Nanda Devi's main summit (7,816 m) occurred on August 27, 1964, by an organized by the and led by Captain Narinder Kumar, following unsuccessful attempts by Indian teams in 1957 and 1961. The team followed the original 1936 route via the south ridge, establishing multiple camps in the , and marked the by an all-Indian party, with several Sherpas including Nawang Gombu among the summiteers. Subsequent climbs in the 1970s included an Indo-French expedition in 1975, which achieved the third official ascent of the main summit via the south , with Indian Army officer Prem Chand among the summiteers; this effort also contributed to the second recorded ascent of the adjacent Nanda Devi East (7,434 m) summit by and Louis Dubost during related traverses. A notable record was set in 1976 by an American team led by Reichardt, who completed the fifth ascent via a new route on the northwest face and north , reaching the summit on September 1; climbers Jim States, , and pioneered this technically demanding line, bypassing the traditional southern approach and highlighting the peak's northern aspects for the first time. Between 1974 and 1982, following the reopening of access to the Sanctuary, at least 15 expeditions targeted Nanda Devi and its east peak, resulting in additional successful summits primarily via established southern routes, though exact numbers remain limited due to variable reporting and the peak's remoteness. These efforts underscored Nanda Devi's status as India's highest entirely domestic peak, with ascents challenging due to its steep rock faces, seracs, and weather, but no further route records were established before the 1983 ban on climbing, which halted all permitted expeditions to protect the fragile Sanctuary ecosystem.

Factors Leading to 1983 Climbing Ban

The 1983 ban on mountaineering expeditions to Nanda Devi stemmed primarily from extensive ecological damage inflicted by unregulated climbing activities in the preceding decades. Prior to the prohibition, numerous expeditions—often involving large teams and prolonged stays—resulted in deforestation, soil erosion, waste accumulation, and disruption of fragile alpine flora and fauna within the Nanda Devi Sanctuary. A study documented heavy destruction of biological resources, including rare endemic species, due to uncontrolled human interference that exceeded the ecosystem's carrying capacity. Indian authorities cited this environmental degradation as the core rationale, with excessive expeditions before 1983 having irreparably harmed the biosphere's integrity. Contributing to the decision were lingering security concerns tied to a joint U.S.- intelligence operation, during which a -powered device fueled by approximately 5 kg of was lost in an while being transported toward Nanda Devi's summit for monitoring Chinese activities. Follow-up efforts in 1966 failed, leaving the device unrecovered at high altitude, and its existence was declassified in 1978, heightening fears of if climbers disturbed the site. While not the sole factor, this incident amplified calls for closure to mitigate risks of environmental and health hazards from potential device breach. The sanctuary's inherent ecological fragility, characterized by steep terrain, thin soils, and biodiversity hotspots including snow leopards and blue sheep, underscored the need for total restriction to allow recovery. Post-ban assessments confirmed that prior commercialization of had polluted water sources and accelerated loss, justifying the indefinite on access to both locals and outsiders except for limited scientific or purposes. This measure aligned with broader priorities, though it later drew scrutiny for socioeconomic impacts on dependent communities.

Conservation Measures and Ecological Outcomes

Establishment of Protected Areas

The Nanda Devi Sanctuary was established in 1939 as India's first Himalayan game sanctuary, covering the inner basin around the peak to safeguard wildlife populations such as snow leopards and , prompted by observations of habitat disturbance during early 20th-century expeditions. This initial protection, spanning roughly 200 square kilometers, restricted hunting and grazing to mitigate threats from unregulated human activity in the high-altitude alpine meadows. In 1982, under the Wildlife (Protection) Act of 1972, the sanctuary was expanded and redesignated as , encompassing 630.33 square kilometers in Chamoli and districts of , with the objective of conserving endemic flora like the endangered Saussurea costus and subalpine forests while prohibiting resource extraction and permanent settlements. The park's core, known as the Inner Sanctuary, remained largely inaccessible, building on prior closures to prevent ecological degradation from trekking waste and documented in surveys. The Nanda Devi Biosphere Reserve was notified in 1988 by the government, integrating the as its core zone within a total area of 2,236.74 square kilometers that includes buffer and transition zones for sustainable land use and research. recognized it as part of the that year, citing its role in preserving trans-Himalayan biodiversity hotspots with over 300 bird species and rare mammals, though implementation faced challenges from limited local involvement in planning. The reserve's structure emphasized scientific monitoring over , extending protections to adjacent areas like the Valley of Flowers to address watershed integrity and .

Biodiversity Recovery and Scientific Value

The 1983 ban on , , , and resource extraction within , enforced as part of broader conservation measures, facilitated marked biodiversity recovery by minimizing anthropogenic pressures. Forest cover and density improved substantially in the decades following the restrictions, as documented in ecological assessments attributing the gains to halted browsing and wood collection. This recovery extended to wildlife populations, with blue sheep (Pseudois nayaur), a primary prey species for snow leopards, exhibiting increased abundance in the protected core zone compared to adjacent grazed areas. Himalayan (Moschus chrysogaster), classified as endangered, have shown slow but steady population stabilization, benefiting from reduced poaching and habitat disturbance. The park's core zone, designated a strict no-entry area except for periodic scientific access, has preserved a largely undisturbed supporting seven of India's 18 endangered large species, including snow leopards (Panthera uncia), brown bears (Ursus arctos isabellinus), and (Capricornis thar). Avian and invertebrate diversity, encompassing threatened birds and the endemic snow Apollo butterfly (Parnassius hardwickii), has likewise benefited, with overall demonstrating "phenomenal improvement" over 20 years of stringent protection post-1988 World Heritage listing. Floral richness, including rare alpine species like (Aconitum spp.) and blue poppy (Meconopsis), has been bolstered by natural regeneration in the absence of overexploitation. Nanda Devi's scientific value lies in its role as a baseline control site for Himalayan ecological research, enabling long-term monitoring of high-altitude dynamics. Decadal expeditions, such as the 1993 Nanda Devi Scientific and Ecological Expedition, surveyed over 620 plant species across 400 genera and assessed faunal habitats, establishing benchmarks for subsequent evaluations. These efforts, conducted by institutions like the , track (e.g., snow leopards, blue sheep) and indicators of ecosystem health, informing broader conservation strategies amid climate pressures. The reserve's isolation has also supported studies on threatened , identifying 34 high-value species and their habitat suitability, underscoring its contributions to and pharmaceutical research.

Criticisms of Restrictions on Human Activity

Local communities in the buffer zones of Nanda Devi Biosphere Reserve have criticized conservation restrictions for curtailing traditional resource use, including , fuelwood collection, and harvesting of non-timber products such as , without providing sufficient alternative livelihoods. These limitations, imposed after the area's designation as a in 1982 and reserve in 1988, led to estimated annual household losses of approximately Rs. 1,587 from restricted medicinal plant collection and Rs. 7,904 from bans on other activities like . Critics argue that park authorities failed to integrate local knowledge or involve communities in management planning, fostering resentment and conflicts over exclusionary policies that prioritized over human needs. The 1983 ban on and tourism, intended to halt ecological from unregulated expeditions, has drawn particular ire for eliminating income from guiding, portering, and related services that previously supported thousands of households. Studies document socio-economic fallout, including reduced employment opportunities in the 45 villages home to over 15,000 residents, many reliant on seasonal prior to the closure. Local opposition stems from the perception that the ban, while aiding recovery, ignored the , leading to , illegal resource extraction, and outmigration as unaddressed tensions between goals and community persisted. Despite broad local support for efforts—reported at 85% in surveys—negative attitudes toward restrictions arise from inadequate access to resources and wildlife-related damages, such as crop raiding, which exacerbated economic strains without compensatory mechanisms. Mean annual losses per household from such damages reached Rs. 1,285 for food crops, Rs. 1,195 for fruit trees, and Rs. 156 for , underscoring critiques that strict human activity bans inadvertently amplified vulnerabilities for resource-dependent populations. Proponents of reform advocate for participatory models, including regulated in buffer areas, to balance ecological protection with , though implementation gaps have prolonged grievances.

The 2021 Chamoli Disaster

Sequence of Events and Immediate Causes

On February 7, 2021, at approximately 10:21 IST, a massive rock and ice initiated the Chamoli disaster when roughly 27 million cubic meters of material detached from an unstable cliff face at around 5,600 meters elevation on the north flank of the Trisul massif, above the Ronti Gad valley in the of , . This failure involved fractured and a small overlying glacieret, with observations indicating pre-event deformation and motion of the rock mass dating back months, suggesting progressive instability rather than a sudden (GLOF). The accelerated downslope at speeds exceeding 70 meters per second, scouring the narrow Ronti Gad and entraining additional loose , , and supraglacial from a hanging below, which transformed the flow into a hyperconcentrated by approximately 10:25 IST. This breached into the main Rishiganga River valley around 10:30 IST, generating a destructive that overtopped and obliterated the Rishiganga (13.5 MW capacity) located about 10 kilometers downstream, with eyewitness accounts and video footage capturing the event's onset near the . The debris-laden flood propagated further, reaching the of the Rishiganga and Dhauliganga rivers by roughly 10:45 IST, where it inundated the under-construction Tapovan-Vishnugad hydroelectric project and associated infrastructure, depositing thick layers of boulders, mud, and ice across the valley floor before partially attenuating in the wider channel downstream. Immediate causes centered on the geological failure of the overhanging rock spur, likely exacerbated by undercutting from prior erosional events, freeze-thaw cycles, and degradation, though analyses ruled out a primary GLOF mechanism—initial speculations of a Nanda Devi burst were refuted by post-event modeling and data showing no significant supraglacial lake drainage. The event's rapidity stemmed from the steep Himalayan , which amplified and , with no of anthropogenic triggers like nearby directly precipitating the detachment.

Casualties, Damage, and Attribution Debates

The resulting from the February 7, 2021, rock-ice avalanche in claimed the lives of over 200 people, with official counts reporting 204 individuals killed or missing, including workers at hydropower sites and local residents. Recovery efforts yielded 83 bodies and 36 additional human remains by May 2021, though many victims remained unrecovered due to the remote terrain and ongoing debris flows. Infrastructure damage was extensive, with the flood obliterating the 13.5 MW Ganga hydropower plant and its barrage, while inflicting severe destruction on the under-construction 520 MW Tapovan-Vishnugad , including tunnels, worker camps, and . Direct economic losses from the two facilities exceeded $223 million USD, encompassing costs and lost generation capacity, alongside widespread scouring of , bridges, and villages like Raini. The event also triggered secondary landslides and remobilization, exacerbating long-term in the Rishi Ganga and Dhauliganga valleys, with total estimated losses approaching Rs. 20,000 million (approximately $240 million USD at contemporary exchange rates). Attribution debates initially focused on a (GLOF) or pure glacier burst, but , seismic data, and modeling confirmed the primary trigger as a ~27 million cubic meter rock-ice detaching from the Raunthi at ~5,800 meters , which entrained water and debris to form a high-velocity flow. identify natural drivers, including gravitational instability from steep , loose fractured rock exacerbated by heavy snowfall accumulation in headwall cracks, and degradation linked to rising temperatures, rather than direct human causation. Critics, including environmental advocates, contend that prolific in the seismically active and ecologically fragile Himalayan region amplified vulnerability by placing in debris-flow paths and potentially destabilizing slopes through tunneling and blasting, though no peer-reviewed evidence substantiates these activities as the 's proximate cause. Proponents of expanded projects argue the underscores the need for resilient in inherently hazardous zones, with the 's scale—equivalent to of multiple atomic bombs—overwhelming any localized human influence. These debates highlight tensions between empirical geological assessments prioritizing endogenous Himalayan instability and broader concerns over cumulative pressures like climate-induced thaw and unchecked .

Contemporary Issues and Access Reopening

Socio-Economic Impacts of Long-Term Closure

The imposition of restrictions on access to the Nanda Devi core zone following the establishment of the in 1982 and subsequent biosphere reserve designation in 1988 led to substantial economic losses for adjacent communities, who historically relied on expeditions for porterage, guiding, and supply services. In villages such as Lata, Reni, and Tolma, tourism-related income constituted a primary source prior to the closures, with the ban on adventure activities representing the most severe economic disruption. Approximately 80% of households in these areas reported acute financial distress, as alternative employment options were limited in the high-altitude, resource-scarce environment. Restrictions on traditional resource use compounded these effects, including bans on commercial collection of and limitations on in buffer zones, which households estimated caused annual losses of Rs. 1,587 from nontimber forest products and Rs. 7,904 from curtailed activities. These measures curtailed subsistence practices integral to local agro- economies, without effective provision of compensatory programs or for non-tourism sectors. The resulting income deficits accelerated out-migration, particularly of younger males, to urban centers like and , depopulating villages and eroding social structures such as joint family systems and cultural knowledge transmission. Human-wildlife conflicts intensified as policies facilitated wildlife population rebounds, leading to uncompensated crop depredation and losses that further strained household budgets in the absence of viable or mechanisms. Local surveys indicated that such conflicts affected most villages, with wildlife incursions displacing agricultural productivity and reinforcing perceptions of inequitable burdens borne disproportionately by marginalized highland residents. Overall, the long-term closures prioritized ecological preservation over socioeconomic integration, fostering resentment and unsustainable dependence on sporadic rather than fostering resilient local economies.

2025 Reopening Plans and Balancing Debates

In July 2025, the state government announced intentions to reopen Nanda Devi peak—the highest mountain entirely within at 7,816 meters—for regulated expeditions, ending a ban in place since 1983 that restricted access to the inner sanctuary to protect its fragile alpine ecosystem. The proposed framework includes limited annual permits, mandatory environmental impact assessments, and strict protocols such as waste management and group size caps to minimize human footprint, with approvals required from both state tourism authorities and national bodies like the Ministry of Environment, Forest and Climate Change. As of October 2025, implementation details remain under review, with no expeditions confirmed for the peak's main west summit, though adjacent Nanda Devi East (7,434 meters) has seen permitted treks and climbs in prior years. The reopening plans have ignited debates over balancing conservation imperatives with socio-economic opportunities. Proponents, including state tourism officials, emphasize potential revenue for local communities in Chamoli and districts, where restricted access has limited livelihoods dependent on guiding, portering, and related services; they cite successful regulated models on peaks like as evidence that controlled access can generate funds for park maintenance without irreversible harm. Critics, including ecologists and indigenous representatives, counter that the 1983 ban enabled measurable biodiversity gains—such as population rebounds in snow leopards and blue sheep— and warn that even limited climbing could introduce , , and trail erosion in an area with thin soils and high seismic activity, as evidenced by the 2021 Chamoli glacial burst linked to upstream fragility. They also highlight the peak's sacred status in Hindu tradition as the abode of Nanda, arguing that commercial expeditions profane its cultural sanctity, a view echoed in petitions from local priestly groups opposing any non-pilgrimage access. Resolution of these tensions hinges on empirical monitoring; preliminary studies commissioned by the state in 2025 aim to assess using data from and ground surveys, but skeptics question the impartiality of tourism-driven assessments, given Uttarakhand's reliance on adventure revenue amid post-pandemic economic pressures. If approved, initial expeditions could commence in the 2026 pre-monsoon season, pending clearance, with ongoing debates underscoring the challenge of quantifying ecological thresholds against verifiable economic uplift in remote Himalayan regions.

References

  1. [1]
    Nanda Devi Reopens: India's Iconic Peak Returns in 2025
    Aug 5, 2025 · Nanda Devi (7,816 m) is the second-highest mountain in India after 8,586 m Kangchenjunga, and the highest located entirely within the country.<|separator|>
  2. [2]
    Nanda Devi - AAC Publications
    Nanda Devi, 25,660 ft. in altitude, variously called “The Blessed Goddess” or the “Goddess Nanda,” is the highest peak in the British Empire. It lies almost ...
  3. [3]
    Nature, Conflict and Biodiversity Conservation in the Nanda Devi ...
    In September of 1982, the Nanda Devi basin (624 sq km) was named a national park (NP) and subsequently closed due to the environmental degradation suffered from ...
  4. [4]
    The Story of Nanda Devi: Irresistible Will Meets Immovable Goddess
    Jan 5, 2023 · On August 29, 1936, Bill Tilman and Noel Odell managed to make the first ascent of the main peak of Nanda Devi (7,816m) via the southwest ridge.Missing: height significance
  5. [5]
    Did nuclear spy devices in the Himalayas trigger India floods? - BBC
    Feb 20, 2021 · In October 1965, a group of Indian and American climbers lugged up seven plutonium capsules along with surveillance equipment - weighing some ...
  6. [6]
    [PDF] CIA-RDP81M00980R001200070033-6
    The devices, containing plutonium, were placed on two mountains, one of which, Nanda Devi, is the source of India's Ganges River, the holy river for millions ...
  7. [7]
    Uttarakhand mulls reopening Nanda Devi after 42-year ban; IMF ...
    Jul 17, 2025 · 'Closed over environmental concerns, Cold War-era operation': Uttarakhand mulls reopening Nanda Devi after 42-year ban; IMF submits proposal.
  8. [8]
    Nanda Devi - Peakbagger.com
    Elevation: 7816 meters, 25,643 feet ; Latitude/Longitude (WGS84), 30.37578, 79.970937 (Dec Deg) 30° 22' 33'' N, 79° 58' 15'' E (DMS) 401123 E, 3360875 N, Zone 44 ...Missing: exact | Show results with:exact
  9. [9]
    Nanda Devi - PeakVisor
    GPS coordinates. 30.37574 ... Nanda Devi is the second-highest mountain in India, after Kangchenjunga, and the highest located entirely within the country.
  10. [10]
    Story of the Nanda Devi Sanctuary - Harish Kapadia
    The twin peaks of Nanda Devi (7816 m) and Nanda East (7434 m) stand majestically in the centre of a ring of peaks. Looked at from any angle the Nanda Devi peaks ...Missing: topography isolation
  11. [11]
    Petrology and Geochemistry of Granitic Gneisses from Main Central ...
    Aug 6, 2025 · Granitic gneisses are characterized by mineral assemblage quartz-plagioclase-feldspar-biotite-muscovite. Results of two-feldspar thermometry ...
  12. [12]
    http://www.yourarticlelibrary.com/environment/environmental-profile-of-nanda-devi-biosphere-reserve/42651
  13. [13]
    Metamorphism and tectonics of the Himalaya - GeoScienceWorld
    Mar 3, 2017 · Metamorphism connected with the main growth and deformation stages of the Himalaya ranges from mid-Cretaceous to the Quaternary.
  14. [14]
    Tectonics of the Indian Subcontinent: An Introduction - ResearchGate
    Aug 26, 2020 · Geology and Tectonics of the Indian Sub-continent constitute a significant component of the Indian Plate straddling the equator as a part of the ...
  15. [15]
    (PDF) Tectonics of the Higher Himalayan Crystallines along ...
    Mar 19, 2022 · Geologically, the Langsi area of Uttarakhand is mainly characterized by the Lesser Himalayan rock systems, including phyllite, quartzite, slate, ...
  16. [16]
    HJ/35/5 NANDA DEVI AND THE SOURCES OF THE GANGES
    Our main objects were to discover a route into the inner basin at the foot of Nanda Devi, the 'inner sanctuary' as it has been called.
  17. [17]
    [PDF] GLACIERS OF INDIA - USGS Publications Warehouse
    ... Nanda Devi areas of the Indian Himalaya. The major glaciers are demarcated. This area includes the Gangotri Glacier, largest in India. Its meltwater stream ...
  18. [18]
    Complete Guide to Nanda Devi Group of Glaciers of Uttarakhand
    The awe-inspiring Nanda Devi Group of Glaciers refers to the cluster of seven glorious glaciers namely Bartoli, Kururntoli, Nada Devi North, Nanda Devi South, ...
  19. [19]
    Glacier changes and associated climate drivers for the last three ...
    Feb 20, 2021 · We examined eight glaciers in the upper Rishi Ganga catchment, Nanda Devi region, Central Himalaya, India, to assess their spatial and temporal variability ...
  20. [20]
    [PDF] Differential recession of glaciers in Nanda Devi Biosphere Reserve ...
    In recent decades, the Himalayan glaciers have been reported to retreat with an accelerated rate (Raina, 2010). However, their retreat rate significantly varies ...
  21. [21]
    (PDF) Changing glacial lakes and associated outburst floods risks in ...
    Aug 10, 2025 · The present study was undertaken to map glacial lakes, their increasing extent, and associated damage potential in Nanda Devi Biosphere Reserve (NDBR), Indian ...
  22. [22]
    A massive rock and ice avalanche caused the 2021 disaster at ...
    The sheared nature of the source rocks and contrasting interbedded rock types likely conditioned the failure [(22), section 1]. ... Nanda Devi Biosphere Reserve: ...
  23. [23]
    A geotechnical investigation on a recent gigantic rock avalanche at ...
    Sep 13, 2025 · The Lesser Himalayan Sequence mostly consists of sedimentary and meta-sedimentary rocks such as quartzite, phyllite, shale, slate, dolomite, and ...
  24. [24]
    Nanda Devi: Sacred Himalayan Goddess of Uttrakhand - 2lafz
    Jun 6, 2025 · Nanda Devi is a form of Goddess Parvati, the wife of Lord Shiva, who is worshipped as the daughter of the Himalayas.<|separator|>
  25. [25]
    Nanda Devi - Uttarakhand Trip Trek
    Feb 22, 2024 · It is considered to be the abode of the goddess Nanda Devi, who is believed to be an incarnation of Goddess Parvati, the consort of Lord Shiva.
  26. [26]
    The legend behind Nanda Devi mountain - The Hindu
    Mar 16, 2017 · This mountain (25,643ft) came to be revered as a temple for Nanda and she was deified as the Devi, the patron goddess. The Nanda Devi Massif has ...
  27. [27]
    Nanda Devi: Mountain, Mythology and Tragedy - Mark Jenkins
    Mar 23, 2022 · It is a sanctuary and home to the deity Nanda Devi (“bliss-giving goddess” in Sanskrit). In legend, Nanda was a beautiful princess who was not ...
  28. [28]
    Legends from the Living Mountain - Hinduism Today
    The people of the region also view Nanda Devi as a benevolent source of life and renewal. According to ancient Hindu mythology, a flood once covered the entire ...
  29. [29]
    Nanda Devi: The Mountain and the Goddess | HuffPost Religion
    Nov 4, 2015 · In one of the more playful Hindu myths, Lord Shiva and his bride, the mountain goddess, are cavorting in the Himalayas. Teasing her omnipotent ...
  30. [30]
    Indian Mountain Stories - Nanda Devi - Google Sites
    To escape a willy Afghan Prince, she became one with a mountain. In this interpretation, the Himalayas become her father and thus call her Parvati. Durga is the ...
  31. [31]
    Bhutia | Encyclopedia.com
    Nanda Devi, a form of Shiva's consort Parvati, is the focus of a local cult and figures prominently in the life of the Bhutia and other peoples in the region.
  32. [32]
    NANDA DEVI & VALLEY OF FLOWERS NATIONAL PARKS
    Geology and metamorphism of the Nanda Devi region, Kumaon, Higher Himalaya, India. Himalayan Geology, Wadia Institute of Himalayan Geology, Dehra Dun 9: 3-17.
  33. [33]
    Bikhoti (बिखोती) Bhotiya Ritual Dance Mask Festival of Lata village
    Aug 16, 2021 · This festival – locally referred to as Bikhoti (बिखोती) is celebrated annually in the month of Baisakh in the village of Lata. Nanda Devi Temple – ...
  34. [34]
    Nanda Devi Temple, Almora: A Divine Journey to the Abode of the ...
    Apr 7, 2025 · Mythological Story​​ As per local legends, Nanda Devi is the daughter of the Katyuri dynasty and the consort of Lord Shiva. She is considered a ...
  35. [35]
    Nanda Devi Mela of Uttarakhand - Popular Fairs & Festivals ...
    Nanda Devi Mela of Uttarakhand is the chief patronizing Goddess of Uttarakhand and several shrines are devoted to her all across the central Himalayas.
  36. [36]
    Nanda Devi Raj Jaat Yatra - World's Longest Pilgrimage Trek
    Aug 11, 2022 · Raj Jaat Yatra signifies the journey of Mother Nanda, leaving her maternal home and going to Kailash. Mother Nanda is considered Lord Shiva's ...
  37. [37]
    https://nagarjunatravels.com/blog/nanda-devi-raj-jat-yatra-2026-date-and-route
  38. [38]
    Nanda Devi Raj Jat Yatra 2026: Complete Travel Guide, History ...
    Apr 22, 2025 · The tradition of the Raj Jat Yatra dates back over 500 years, rooted in the folk legends and traditions of the Garhwal kingdom. It was ...
  39. [39]
    [PDF] Nanda Devi Raj Jat Yatra: Cultural, Religious and Environmental ...
    The Raj Jat Yatra is a duodecennial procession from Nauti village to Hom Kund, also known as the 'Himalayan Kumbha', and is a pilgrimage for the hilly people.
  40. [40]
    (PDF) The Royal pilgrimage of the Goddess Nanda - ResearchGate
    Aug 5, 2025 · This four-horned ram leads a procession of priests and pilgrims on the most dangerous and spectacular pilgrimage in all of India: a three-week, ...
  41. [41]
    [PDF] A case of Nanda Devi Raj Jaat Yatra in Uttarakhand, India - iccaua
    This cyclical pilgrimage occurs every twelve years and holds profound significance for the communities of Kumaon and Garhwal, embodying centuries-old traditions.<|separator|>
  42. [42]
    HJ/62/2 Nanda Devi: Vision or Reality? - The Himalayan Club
    The persona of Nanda Devi is viewed locally in the light of ordained male chauvinism that views its women in practice as little better than beasts of burden ...
  43. [43]
    Nanda Devi Raj Jat Yatra: Everything You Should Know About It
    Oct 28, 2024 · The Nanda Devi Raj Jat Yatra is one of the most sacred and celebrated pilgrimages in Uttarakhand, steeped in history, mythology, and ...
  44. [44]
    A2: The Highest Mountain in the World (1819) - Alpinist Magazine
    Aug 10, 2018 · Apart from its significance to the history of climbing, Nanda Devi figures prominently in the history of mountain surveying, largely because of ...Missing: pre- 20th
  45. [45]
    HJ/65/3 The Great Game of Mapping the Himalaya
    From 1816-1820, William Webb spent five lonely years surveying Kumaun (he determined the height of Peak XIV or Nanda Devi as 25,669 feet, just 24 feet higher ...
  46. [46]
    The men who measured Earth's curves - Mint
    Dec 21, 2013 · Waugh had measured Nanda Devi ... He patched together the story of the Great Trigonometrical Survey's odyssey—and produced his book The Great Arc ...
  47. [47]
    [PDF] NANDA DEVI, 1936 - Alpine Journal
    NANDA DEVI, 1936. A NOTE. The British-American Himalayan Expedition of 1936 consisted of. A. Carter, A. B Emmons, C. S. Houston, W. F. Loomis, P. Lloyd,.
  48. [48]
    [PDF] THE ASCENT OF NANDA DEVI - Alpine Journal
    O n that day we piled ourselves, six Sherpas and 2500 lb. of junk into two lorries and arrived at Garul about midday, where we met the Dotials and began the ...Missing: details | Show results with:details
  49. [49]
    HJ/9/3 THE ASCENT OF NANDA DEVI - The Himalayan Club
    This mountain (25,645 feet) is the highest in Garhwal, or indeed in British territory,1 and its unique position is too well known to readers of the Journal to ...Missing: significance | Show results with:significance
  50. [50]
    TO THE HIGHEST SUMMIT YET REACHED; A Climber's Account of ...
    Early on the morning of Aug. 29 they set out for the summit, over the route previously explored by Houston and Odell. They followed the ridge to its upper limit ...
  51. [51]
    Bill Tilman de la Nanda Devi à l'Everest - Blog Expeditions Unlimited
    Jul 9, 2020 · In 1936, at Nanda Devi (7,816 m), he covered himself in glory. He made the first ascent of the highest peak in the Indian Himalayas, a victory ...Missing: details | Show results with:details
  52. [52]
    Inside the CIA Mission to Haul Plutonium Up the Himalayas - WIRED
    Apr 29, 2013 · The CIA had to rely on much rougher methods like climbing the Himalayan mountains. In theory, it was an ideal place to put sensor devices and spy on China.<|separator|>
  53. [53]
    Nuclear leakage in Ganga? How a secret CIA mission 60 years ago ...
    Jul 2, 2025 · In 1965, India's top climbers carried a nuclear spying device up Nanda Devi for the CIA to watch China's atomic tests. Bad weather forced them to abandon it.
  54. [54]
    A Nuclear Mystery: The Nanda Devi Plutonium Mission
    Nov 18, 2023 · The reason this is potentially hazardous is due to the fact that Pu238 (the element used in both the device and capsules) is radioactive. It has ...
  55. [55]
    How Did India Lose A Nuclear Device On A Glacier? Here's The ...
    May 3, 2021 · In 1965, the US approached India to help keep tabs on China's nuclear activities. What transpired was a secret expedition which was ...
  56. [56]
    The Dark Legacy Of The CIA's Bungled Plot To Have ... - Defector
    Feb 28, 2021 · CIA officials eventually chose Nanda Devi, the tallest peak entirely within India's borders. Nanda Devi offered two advantages to the ...
  57. [57]
    The Second Ascent of Nanda Devi - AAC Publications
    After four hours of struggle we reached the summit of Nanda Devi, 25,645 feet, one of the highest peaks in Indian territory. The summit was flat, and it ...
  58. [58]
    HJ/25/12 NANDA DEVI, 1964 - The Himalayan Club
    A French expedition, with Nandu Jayal as a liaison officer, attempted to climb the West peak and traverse the ridge between, in the East peak, but failed.3 In ...
  59. [59]
    HJ/70/9 Nanda Devi East 75 Years on : A Journey Through the Past
    Jul 3, 2014 · A small, lightweight and semi-alpine style expedition successfully climbed the south ridge of Nanda Devi East (7434 m) in the Kumaun Himalaya.
  60. [60]
    Nanda Devi from the North - AAC Publications
    As the highest peak in the British Empire, many naturally wanted to climb it in the 19th and early 20th centuries, but none could even find a way to its base ...
  61. [61]
    The Inner Sanctuary - Mountain Shepherds Initiative
    1st Ascent / South Ridge (Nanda Devi East – Bujak and Klarner), Led by Adam Karpinski, this 4-member expedition approachs Nanda Devi East from the east, but ...<|control11|><|separator|>
  62. [62]
    (PDF) Socio-economic and ecological consequences of the ban on ...
    Aug 6, 2025 · Prior to 1982, the uncontrolled mountaineering activities to the Nanda Devi peak led to theheavy destruction of the biological resources of ...
  63. [63]
    Banned in '83, will Nanda Devi open for tourists again?
    Jun 10, 2015 · ... banned in 1983 by the Centre as excessive climbing expeditions undertaken before 1983 had damaged the ecology of the Nanda Devi Biosphere.<|separator|>
  64. [64]
    How an India-US spy mission lost a nuclear device in the Himalayas
    Jul 25, 2025 · The lost nuclear device from the Nanda Devi Plutonium Mission has returned to public discourse with every natural calamity in Uttarakhand ...
  65. [65]
    Is Nanda Devi open now ?Why Climbing Nanda Devi Peak Was ...
    Jul 19, 2025 · Fears of radioactive contamination also became one of the reasons for the closure. After observing the negative impact of human interference, ...
  66. [66]
    Nanda Devi : Climbing, Hiking & Mountaineering : SummitPost
    12-member Indo-American team – John Roskelley, Jim States, and Louis Reichardt succeed at forging a difficult new route. Ad Carter, member of the original 1936 ...
  67. [67]
    [PDF] IUCN SUMMARY 335: NANDA DEVI NATIONAL PARK (INDIA ...
    Nanda Devi National Park is the oldest established Himalayan protected area, having originally been created a game sanctuary in 1939 after the exploration.Missing: timeline | Show results with:timeline
  68. [68]
    Nanda Devi - Man and the Biosphere Programme (MAB) - UNESCO
    The unique topography, climate, soil and biogeographical location of the Biosphere Reserve gives rise to diverse habitats, communities and ecosystems, and a ...<|separator|>
  69. [69]
    Nanda Devi and Valley of Flowers National Parks
    The Nanda Devi and Valley of Flowers National Parks are exceptionally beautiful high-altitude West Himalayan landscapes with outstanding biodiversity.
  70. [70]
    Socio-economic and ecological consequences of the ban on ...
    A ban on tourismactivities, followed by the designation of NDBR directly helped in a significant improvement in forestcover and density. The better status of ...
  71. [71]
    Case of Nanda Devi biosphere reserve, Western Himalaya, India
    Nov 26, 2008 · The ecological and socio‐economic studies conducted after the ban revealed that there has been substantial improvement in the biodiversity of ...Missing: recovery | Show results with:recovery
  72. [72]
    Natural Resource Use by Humans and Response of Wild Ungulates
    Aug 1, 2011 · Comparison of abundance estimates for blue sheep in Nanda Devi National Park (no livestock grazing) and Bedini-Ali (> 4000 livestock) clearly ...
  73. [73]
    Why Nanda Devi Peak Reopening Is A Bad Idea - Scoutripper
    Nanda Devi peak has been closed to tourism since 1983 due to severe environmental damage from unregulated expeditions. The ban protects rare wildlife, prevents ...Missing: issues | Show results with:issues
  74. [74]
    Nanda Devi and Valley of Flowers National Parks
    Nanda Devi is the only protected area in India to hold the single wild population of Saussurea costus – a Red listed plant species (Rajvanshi, et al., 2012).
  75. [75]
    [PDF] INDIA Nanda Devi National Park - UNESCO World Heritage Centre
    The park is largely unspoilt, with a strict core zone, and biodiversity has improved. However, there are risks of poaching, and 7 of 18 large mammal species ...Missing: recovery | Show results with:recovery
  76. [76]
    Nanda Devi Biosphere Reserve: journey through scientific archives ...
    The research identified 34 high-value and threatened medicinal plant species in the region. Sinopodophyllum hexandrum had the largest potentially suitable ...
  77. [77]
    Management Conflicts in the Nanda Devi Biosphere Reserve, India
    These include failure to consider the question of alternative means of liveli- hood following curtailment of people's usufruct rights in the area, loss of eco-.
  78. [78]
    Impact of Conservation and Development on the Vicinity of Nanda ...
    Mar 2, 2016 · The estimated loss from restrictions on the collection of medicinal plants for sale was Rs. 1,587, and a loss of Rs. 7,904 resulted from the ban ...
  79. [79]
    Local Peoples' Knowledge, Aptitude and Perceptions of Planning ...
    Aug 7, 2025 · Conflicts ensued between local inhabitants and the management authority due to lack of community participation.Missing: criticisms | Show results with:criticisms
  80. [80]
    [PDF] Perception of local people towards conservation of forest resources ...
    85% of locals support conservation, but management decisions led to negative attitudes due to restricted access, though alternative income was positively ...
  81. [81]
    A case study from Nanda Devi Biosphere Reserve (a World Heritage ...
    Aug 9, 2025 · Mean annual economic loss per household was estimated as Rs 1285, Rs 1195 and Rs 156 due to damage caused by wildlife to food crops, fruit trees ...
  82. [82]
    [PDF] ScholarWorks at University of Montana
    The goal of this research was to understand the barriers and opportunities for local involvement in the management of the Nanda Devi Biosphere Reserve in ...
  83. [83]
    Pre-collapse motion of the February 2021 Chamoli rock ... - NHESS
    Oct 13, 2022 · In this study, we use the 7 February 2021 Chamoli rock–ice avalanche as a data-rich example to investigate the potential of remotely sensed datasets for the ...
  84. [84]
    Satellites reveal cause of Chamoli disaster - ESA
    Jun 14, 2021 · A new study using satellite evidence confirms that a rock and ice avalanche caused the Chamoli disaster in India earlier this year.
  85. [85]
    [PDF] Detailed Report: Uttarakhand Disaster on 7th February 2021
    Table 10: Time stamping and sequence of event. SN. Time Stamping. Sequence of Event. 1. A few minutes before ~10:08:45 hrs. • Glacieret ice and rock slide ...
  86. [86]
    Understanding the Chamoli flood: Cause, process, impacts, and ...
    Mar 3, 2021 · Disaster struck Uttarakhand's Chamoli District on 7 February 2021, when a massive flash flood ravaged through the valleys of the Rishi Ganga ...
  87. [87]
    Non-climate cause of Nanda Devi flood | Nepali Times
    Mar 12, 2021 · Scientists say that the cause was failure of a rock face, and not just the result of a glacial lake burst caused by climate change.
  88. [88]
    A massive rock and ice avalanche caused the 2021 disaster at ...
    Over 200 people were killed or are missing. Our analysis of satellite imagery, seismic records, numerical model results, and eyewitness videos reveals that ~ ...
  89. [89]
    Uttarakhand disaster LIVE: Death toll 32; search, rescue operation ...
    Feb 9, 2021 · As many as 32 bodies have been recovered so far from different areas hit by the glacier burst in Chamoli district, while 197 people are still ...
  90. [90]
    298 deaths in 2021, yr records highest disaster-related fatalities ...
    Oct 24, 2021 · ... Chamoli district that struck on February 7 claiming 204 lives ... official figures, while 4,021 went “missing” and were presumed dead.Missing: toll | Show results with:toll
  91. [91]
    Glacier bursts-triggered debris flow and flash flood in Rishi and ...
    A huge landslide occurred at 5600 ​m altitude, which caused the glacier-bursts outflow and triggered debris flow and flash flood. ISRO, Hyderabad. Whatever the ...
  92. [92]
    Rapid fluvial remobilization of sediments deposited by the 2021 ...
    Jul 27, 2023 · ... 2021 Chamoli disaster, Indian Himalaya Open Access. Matthew J ... damages to HPP infrastructure totaling ~$200 million USD (Dutta, 2021).
  93. [93]
    Progressive destabilization and triggering mechanism analysis ...
    Dec 21, 2021 · Several causes are uncovered as: the pronounced long-term change of land surface temperature facilitated local permafrost degradation and led to ...
  94. [94]
    Hydropower projects are wreaking havoc in the Himalayas
    Mar 19, 2021 · The avalanche smashed two hydroelectric dam projects and killed more than 200 people. A total of 205 people were reported missing in the disaster.Missing: burst | Show results with:burst
  95. [95]
    Chamoli disaster: 'It hit the valley floor like 15 atomic bombs' - BBC
    Jun 12, 2021 · It set in train a cascade of debris that claimed over 200 lives and destroyed hydro-electric infrastructure worth hundreds of millions of ...
  96. [96]
    Impact of Restrictions on the Local Communities - ICIMOD
    The closure of Nanda Devi for tourism was the severest blow to the economy of the region. Tourism used to be the main occupation of the villagers of Lata, Reni, ...
  97. [97]
    Impact of Conservation and Development on the Vicinity of Nanda ...
    There was no impact on religious rituals in the sample 2 villages. The women also reported a loss of recreation opportunities after the closure of the core zone ...
  98. [98]
    Management Conflicts in the Nanda Devi Biosphere Reserve, India
    Nov 1, 2000 · These include failure to consider the question of alternative means of livelihood following curtailment of people's usufruct rights in the area, ...
  99. [99]
    (PDF) Impact of Conservation and Development on the Vicinity of ...
    Sep 6, 2025 · The aim of this present study, carried out in villages adjacent to the Nanda Devi National Park in the Himalayan state of Uttarakhand in India, ...Missing: recovery | Show results with:recovery
  100. [100]
    Crop damage and livestock depredation by wildlife: a case study ...
    Crop yield losses and livestock depredation were serious problems observed in most buffer zone villages of Nanda Devi Biosphere Reserve.
  101. [101]
    Conservation policy–people conflicts: a case study from Nanda Devi ...
    ... Nanda Devi Biosphere Reserve, a World Heritage Site in Indian Himalaya. ... ban on collection of wild medicinal plants for marketing and Rs 7904 due to ban ...Missing: effects | Show results with:effects
  102. [102]
    Nanda Devi peak set to reopen for climbers after four decades ...
    Jul 17, 2025 · Preparations are underway to reopen the majestic Nanda Devi Peak for mountaineering after a hiatus of nearly four decades.Missing: ban plans
  103. [103]
    Nanda Devi Set To Reopen After Four Decades: What Travellers ...
    Jul 19, 2025 · As per reports, Uttarakhand has announced plans to reopen the peak for regulated adventure expeditions. The move has sparked excitement across ...Missing: ban | Show results with:ban
  104. [104]
    Nanda Devi Peak Reopens 2025 – Permit, History & Info - JustWravel
    Jul 29, 2025 · Nanda Devi (7,816 m), India's second-highest peak, is set to reopen for expeditions after 40+ years. · Closed since 1983 due to environmental ...
  105. [105]
    Nanda Devi peak is set to reopen for expedition after 40+ years
    Jul 18, 2025 · A landmark decision taken by Uttarakhand government to reopen Nanda Devi peaks for trekking and mountaineering expeditions.