HydroBASINS lev08 watershed · #4080744070
Bassin de Girthi Ganga
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 5 administrative regions across 3 countries : Chamoli, Ngari, Pithoragarh
Sub-basin area
785,9km²
Upstream area
786km²
Discharge
25,09m³/s
Mean elev.
4 773m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- Chamoli274.8 km²35.0% of basin
- Pithoragarh217.8 km²27.7% of basin
- 196.2 km²25.0% of basin
- 52.7 km²6.7% of basin
- 43.6 km²5.6% of basin
1 intersecting protected areas
Nanda Devi
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
780.66 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
83 distinct species · 244 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 Girthi Ganga : 10 espèces reliées par 13 interactions GloBI sur 3 types (connectance 16.7%, filtre Serrano α=0.2). 3 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°
-1,5°C
Annual rain
806mm
Moisture idx (CMI)
0,22
Runoff
1 004mm/an
PET
628mm
AET
568mm
Mean slope
26,6°
Water table
827cm
Forest
1%
Crops
0%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)