HydroBASINS lev08 watershed · #4080757300
Bassin de Nandakini
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 2 administrative regions : Chamoli, Rudraprayag
Sub-basin area
1 820,4km²
Upstream area
6 435km²
Discharge
207,59m³/s
Mean elev.
2 566m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Saraswati1570 km²
- Bassin de Dhauli Ganga1522 km²
2 dept-equivalent regions (GADM L2)
- Chamoli1818.5 km²100.0% of basin
- 0.1 km²0.0% of basin
2 intersecting protected areas
Nanda Devi
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
48.00 km² overlap
Nanda Devi and Valley of Flowers National Parks
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
3.61 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
766 distinct species · 103 440 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 10 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Nandakini : 6 espèces reliées par 15 interactions GloBI sur 3 types (connectance 22.7%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
11,3°C
Annual rain
1 425mm
Moisture idx (CMI)
0,29
Runoff
808mm/an
PET
998mm
AET
862mm
Mean slope
29,0°
Water table
841cm
Forest
51%
Crops
10%
Urban
2%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)