Parcs nationaux de Nanda Devi et de la Vallée des fleurs

Brève description

Justification d'inscription

Critère (vii) : La Vallée des fleurs est une vallée himalayenne de haute altitude extrêmement belle, célébrée depuis un siècle dans la littérature par des alpinistes et des botanistes renommés et dans la mythologie hindoue depuis bien plus longtemps. La douceur du paysage, les prairies de magnifiques fleurs alpines et la facilité d’accès complètent le paysage de montagne sauvage et accidenté auquel le bassin intérieur du Parc national de Nanda Devi doit sa célébrité.

Critère (x) : La Vallée des fleurs est importante au plan international en raison de sa flore alpine diverse, représentative de la zone biogéographique de l’Himalaya occidental. La riche diversité des espèces reflète la situation de la vallée dans la zone de transition entre les chaînes du Zaskar et du Grand Himalaya au nord et au sud, respectivement, et entre la flore de l’Himalaya oriental et de l’Himalaya occidental. Plusieurs espèces de plantes sont menacées au plan international, plusieurs n’ont pas été décrites ailleurs dans l’Uttaranchal et deux n’ont pas été décrites dans le Parc national de Nanda Devi. La diversité des espèces menacées de plantes médicinales est plus élevée que celle de toute autre aire protégée de l’Himalaya indien. L’ensemble de la Réserve de biosphère de Nanda Devi se trouve dans la Zone des oiseaux endémiques de l’Himalaya occidental et sept espèces d’oiseaux à l’aire de répartition limitée sont endémiques de ce secteur de la Zone des oiseaux endémiques de l’Himalaya occidental.

Description longue

The Nanda Devi National Park is one of the most spectacular wilderness areas in the Himalayas. It is dominated by the peak of Nanda Devi, which rises to over 7,800 m. No people live in the park, which has remained more or less intact because of its inaccessibility. It is the habitat of several endangered mammals, especially the snow leopard, Himalayan musk deer and bharal.

The park lies in Chamoli district, within the Garhwal Himalaya. It comprises the catchment area of the Rishi Ganga, an eastern tributary of Dhauli Ganga which flows into the Alaknanda River at Joshimath. The area is a vast glacial basin, divided by a series of parallel, north-south oriented ridges. These rise up to the encircling mountain rim along which are about a dozen peaks, the better known including Dunagiri, Changbang and Nanda Devi East.

Nanda Devi West, India's second-highest mountain, lies on a short ridge projecting into the basin and rises up from Nanda Devi East on the eastern rim. Trisul, in the south-west, also lies inside the basin. The upper Rishi Valley, often referred to as the 'Inner Sanctuary', is fed by Changbang, North Rishi and North Nanda Devi glaciers to the north and by South Nanda Devi and South Rishi glaciers to the south of the Nanda Devi massif. There is an impressive gorge cutting through the Devistan-Rishikot ridge below the confluence of the North and South Rishi rivers. The Trisuli and Ramani glaciers are features of the lower Rishi Valley or 'Outer Sanctuary', below which the Rishi Ganga enters the narrow, steep-sided lower gorge.

Forests are restricted largely to the Rishi Gorge and are dominated by fir, rhododendron and birch up to about 3,350 m. Forming a broad belt between these and the alpine meadows is birch forest, with an understorey of rhododendron. Conditions are drier within the 'Inner Sanctuary', becoming almost xeric up the main Nanda Devi glaciers. Beyond Ramani, the vegetation switches from forest to dry alpine communities, with scrub juniper becoming the dominant cover within the 'Inner Sanctuary'. Juniper gives way altitudinally to grasses, prone mosses and lichens, and on riverine soils to annual herbs and dwarf willow.

Woody vegetation extends along the sides of the main glaciers before changing gradually to squat alpines and lichens. Local populations use a total of 97 species, for medicine, as food plants, fodder, fuel, tools, house building and fibres, as well as for religious purposes.

The basin is renowned for the abundance of its ungulate populations, notably Himalayan musk deer (listed as 'lower risk' threatened species). Mainland serow and Himalayan tahr are also common. The distribution of goral does not appear to extend to within the basin, although the species does occur in the vicinity of the national park. Large carnivores are common leopard, Himalayan black bear and brown bear, the existence of which has yet to be confirmed. The only primate present is common langur, although rhesus macaque has been sighted outside the park boundaries. Some 83 species are reported from the biosphere reserve.

A total of 114 bird species belonging to 30 families was recorded during the 1993 Nanda Devi Scientific and Ecological Expedition, some 67 for the first time. Species abundant during May and June include crested black tit, yellow-bellied fantail flycatcher, orange-flanked bush robin, blue-fronted redstart, Indian tree pipit, vinaceous-breasted pipit, common rosefinch and nutcracker. Species richness was found to be highest in temperate forests, with a significant decline in richness as elevation increased.

Description historique

Established as a national park with effect from 6 November 1982 as per Notification No. 3912/14-3-35-80 of 6 September 1982, the intention having been declared under Notification No. 2130/14-3-35-80 of 18 August 1980. Dang (1961) provides an historical account of the exploration of the Handa Devi Basin. The first recorded attempt to enter the sacred basin was by W. W. Graham in 1883, but he was unable to proceed beyond the gorge of the lower Rishi Ganga. Subsequent attempts by Dr T. G. Longstaff in 1870 and Hugh Ruttledge in 1926, 1927 and 1932 also met with failure. Finally, in 1934, Eric shipton and H. W. Tilman pioneered a route to the 'Inner Sanctuary' by forcing a passage up the gorge of the upper Rishi Ganga. Later, in 1936, Tilman and N. E. Odell made the first ascent of Handa Devi, reputedly the most outstanding mountaineering success of the pre-Second World War era. It was their accounts of this natural sanctuary that first drew attention to the spectacular mountain wilderness (Tilman, 1935; Shipton, 1936), following which the area was established as a game sanctuary on 7 January 1939 (Government Order No. 1493/XIV-28). Commonly referred to as 'Handa Devi Sanctuary', the name was changed to sanjay Gandhi National Park at the time of notification. This met with local opposition and the site was gazetted as Handa Devi National Park. The park was inscribed on the World Heritage List in December 1988. The park constitutes the core zone of a much larger area (200,000ha), extending as far north as the Dhauli Ganga, that has been proposed as a biosphere reserve (Indian National MAB Committee, n.d.).