HydroBASINS lev08 watershed · #1080639500
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 3 administrative regions across 2 countries : Ansongo, Tillabéry, Téra
Sub-basin area
1 228km²
Upstream area
596 472,3km²
Discharge
791,41m³/s
Mean elev.
255m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Gorouol2603 km²
- Bassin du Niger1595 km²
3 dept-equivalent regions (GADM L2)
- 647.9 km²53.0% of basin
- 543.9 km²44.5% of basin
- AnsongoGao · Mali31.8 km²2.6% of basin
2 intersecting protected areas
Kandadji
IUCN IVNature Reserve
1073.93 km² overlap
Ansongo Giraffe Reserve
IUCN IVPartial Wildlife Reserve
31.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
97 distinct species · 188 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 17 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 reliées par 12 interactions GloBI sur 4 types (connectance 8.8%, filtre Serrano α=0.2). 2 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°
29,1°C
Annual rain
308mm
Moisture idx (CMI)
-0,85
Runoff
11mm/an
PET
2 118mm
AET
257mm
Mean slope
0,4°
Water table
192cm
Forest
0%
Crops
45%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)