HydroBASINS lev08 watershed · #1080965070
Bassin de Nidomey
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 5 administrative regions : Aguégués, Cotonou, Dangbo, Sèmè-Kpodji, Sô-Ava
Sub-basin area
174,6km²
Upstream area
56 634,4km²
Discharge
253,82m³/s
Mean elev.
1m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin · #1080964480131 km²
- Bassin de Ouémé5 km²
5 dept-equivalent regions (GADM L2)
- Sô-Ava81.5 km²46.9% of basin
- 50.1 km²28.8% of basin
- 26.6 km²15.3% of basin
- 11.8 km²6.8% of basin
- 3.8 km²2.2% of basin
1 intersecting protected areas
Wetland of International Importance (Ramsar Site)
173.87 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 115 distinct species · 13 199 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 51 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 Nidomey : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 104 interactions GloBI sur 4 types (connectance 7.3%, filtre Serrano α=0.2). 25 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°
27,2°C
Annual rain
1 253mm
Moisture idx (CMI)
-0,11
Runoff
449mm/an
PET
1 413mm
AET
976mm
Mean slope
0,0°
Water table
5cm
Forest
40%
Crops
20%
Urban
33%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)