HydroBASINS lev08 watershed · #4080925260
Bassin de Nagri
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 6 administrative regions across 2 countries : Dakshin Dinajpur, Katihar, Maldah, Nawabganj, Thakurgaon +1
Sub-basin area
2 379,5km²
Upstream area
5 764,8km²
Discharge
198,54m³/s
Mean elev.
31m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sudhani Nadi1089 km²
- Bassin de নাগর নদী11 km²
6 dept-equivalent regions (GADM L2)
- Maldah1151.3 km²48.5% of basin
- 916.4 km²38.6% of basin
- 114.7 km²4.8% of basin
- 95.9 km²4.0% of basin
- NawabganjRajshahi · Bangladesh67.3 km²2.8% of basin
- ThakurgaonRangpur · Bangladesh29.2 km²1.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
336 distinct species · 14 420 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 Nagri : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 42 interactions GloBI sur 3 types (connectance 7.1%, filtre Serrano α=0.2). 6 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°
25,2°C
Annual rain
1 452mm
Moisture idx (CMI)
-0,05
Runoff
909mm/an
PET
1 534mm
AET
921mm
Mean slope
0,1°
Water table
9cm
Forest
0%
Crops
74%
Urban
26%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)