HydroBASINS lev08 watershed · #4080874300
Bassin de Koshi
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 : Koshi, Sagarmatha
Sub-basin area
235,5km²
Upstream area
54 581,3km²
Discharge
1 666,07m³/s
Mean elev.
294m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Tamor Nadi1682 km²
- Bassin de Sun Kosi2 km²
2 dept-equivalent regions (GADM L2)
- 175.1 km²74.5% of basin
- 60.0 km²25.5% of basin
3 intersecting protected areas
Koshi Tappu
IUCN IVWildlife Reserve
39.00 km² overlap
Koshi Tappu
IUCN Not ReportedWetland of International Importance (Ramsar Site)
36.73 km² overlap
Koshi Tappu - Buffer Zone
IUCN VIWildlife Reserve - Buffer Zone
15.49 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
649 distinct species · 52 499 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Koshi : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 45 interactions GloBI sur 3 types (connectance 8.0%, 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°
23,8°C
Annual rain
1 814mm
Moisture idx (CMI)
0,15
Runoff
893mm/an
PET
1 501mm
AET
955mm
Mean slope
9,1°
Water table
308cm
Forest
26%
Crops
36%
Urban
8%
Protected
23%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)