HydroBASINS lev08 watershed · #4080905060
Bassin de Gandak
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 7 administrative regions : Gopalganj, Kushinagar, Muzaffarpur, Pashchim Champaran, Purba Champaran +2
Sub-basin area
2 644,9km²
Upstream area
42 540,6km²
Discharge
1 845,03m³/s
Mean elev.
63m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Bansi River1071 km²
- Bassin de Gandak629 km²
7 dept-equivalent regions (GADM L2)
- 708.0 km²26.8% of basin
- 527.1 km²20.0% of basin
- 426.0 km²16.1% of basin
- 409.1 km²15.5% of basin
- 303.7 km²11.5% of basin
- 222.3 km²8.4% of basin
- 43.8 km²1.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
232 distinct species · 842 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Gandak : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 41 interactions GloBI sur 3 types (connectance 6.5%, filtre Serrano α=0.2). 7 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°
25,3°C
Annual rain
1 091mm
Moisture idx (CMI)
-0,31
Runoff
490mm/an
PET
1 588mm
AET
806mm
Mean slope
0,0°
Water table
9cm
Forest
0%
Crops
91%
Urban
32%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)