HydroBASINS lev08 watershed · #1080953040
Bassin du Niger
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 : Esan South-East, Etsako Central, Etsako East, Ibaji, Idah +1
Sub-basin area
514,9km²
Upstream area
2 075 133,4km²
Discharge
5 856,75m³/s
Mean elev.
41m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin du Niger196 km²
- Bassin du Niger21 km²
6 dept-equivalent regions (GADM L2)
- 274.8 km²53.6% of basin
- 87.6 km²17.1% of basin
- Igalamela-OdoluKogi · Nigeria56.2 km²11.0% of basin
- 45.7 km²8.9% of basin
- 42.9 km²8.4% of basin
- 5.4 km²1.1% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
241 distinct species · 1 358 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 18 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 du Niger : 15 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 14 interactions GloBI sur 3 types (connectance 9.2%, filtre Serrano α=0.2). 3 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°
27,3°C
Annual rain
1 402mm
Moisture idx (CMI)
-0,17
Runoff
868mm/an
PET
1 698mm
AET
1 069mm
Mean slope
0,5°
Water table
43cm
Forest
48%
Crops
61%
Urban
34%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)