HydroBASINS lev08 watershed · #4080891800
Bassin de Karatoya
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 3 administrative regions across 2 countries : Koch Bihar, Nilphamari, Panchagarh
Sub-basin area
336km²
Upstream area
1 654,5km²
Discharge
76,35m³/s
Mean elev.
61m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Talma River937 km²
- Bassin de Karatoya River381 km²
3 dept-equivalent regions (GADM L2)
- PanchagarhRangpur · Bangladesh280.5 km²83.6% of basin
- NilphamariRangpur · Bangladesh31.4 km²9.4% of basin
- 23.5 km²7.0% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
62 distinct species · 184 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 Karatoya : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 24 interactions GloBI sur 3 types (connectance 7.4%, filtre Serrano α=0.2). 5 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°
24,5°C
Annual rain
2 519mm
Moisture idx (CMI)
0,42
Runoff
1 189mm/an
PET
1 456mm
AET
1 040mm
Mean slope
0,1°
Water table
5cm
Forest
0%
Crops
89%
Urban
4%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)