HydroBASINS lev08 watershed · #1080963920
Bassin de Ouémé
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 15 administrative regions : Adja-Ouèrè, Adjohoun, Aguégués, Akpro-Missérété, Avrankou +10
Sub-basin area
1 289,8km²
Upstream area
48 989,4km²
Discharge
196,67m³/s
Mean elev.
43m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ouémé2658 km²
- Bassin de Zou1466 km²
15 dept-equivalent regions (GADM L2)
- 255.6 km²19.9% of basin
- 228.7 km²17.8% of basin
- 203.7 km²15.9% of basin
- 172.9 km²13.5% of basin
- 116.7 km²9.1% of basin
- 99.5 km²7.7% of basin
- 53.3 km²4.2% of basin
- 52.5 km²4.1% of basin
7 moreFull L2 list
- Akpro-Missérété37.6 km² · 2.9%
- Zè28.9 km² · 2.3%
- Zogbodomey21.7 km² · 1.7%
- Porto-Novo7.6 km² · 0.6%
- Sô-Ava2.3 km² · 0.2%
- Avrankou2.3 km² · 0.2%
- Zagnanado0.7 km² · 0.1%
1 intersecting protected areas
Wetland of International Importance (Ramsar Site)
1284.17 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 486 distinct species · 48 842 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 Ouémé : 12 espèces reliées par 9 interactions GloBI sur 4 types (connectance 9.9%, 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°
27,5°C
Annual rain
1 139mm
Moisture idx (CMI)
-0,31
Runoff
382mm/an
PET
1 672mm
AET
956mm
Mean slope
1,0°
Water table
117cm
Forest
15%
Crops
41%
Urban
22%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)