HydroBASINS lev08 watershed · #4080761090
Bassin de Hiyuni Nadi
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 : Garhwal, Tehri Garhwal
Sub-basin area
255,4km²
Upstream area
255,4km²
Discharge
5,19m³/s
Mean elev.
1 406m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- 253.7 km²99.5% of basin
- 1.4 km²0.5% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
328 distinct species · 3 186 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 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 Hiyuni Nadi : 13 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 3 types (connectance 14.7%, filtre Serrano α=0.2). 4 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°
17,5°C
Annual rain
2 008mm
Moisture idx (CMI)
0,39
Runoff
642mm/an
PET
1 206mm
AET
897mm
Mean slope
24,6°
Water table
822cm
Forest
64%
Crops
16%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)