HydroBASINS lev08 watershed · #1080958520
Bassin de Oni
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 4 administrative regions : Epe, Ijebu East, Odigbo, Ogun Waterside
Sub-basin area
599,4km²
Upstream area
2 953,1km²
Discharge
64,58m³/s
Mean elev.
43m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Oni866 km²
- Bassin de Oni211 km²
4 dept-equivalent regions (GADM L2)
- 274.5 km²46.0% of basin
- 194.1 km²32.5% of basin
- 97.8 km²16.4% of basin
- 30.4 km²5.1% of basin
2 intersecting protected areas
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
489 distinct species · 2 035 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 Oni : 18 espèces reliées par 21 interactions GloBI sur 3 types (connectance 10.0%, 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°
27,2°C
Annual rain
1 713mm
Moisture idx (CMI)
0,09
Runoff
755mm/an
PET
1 554mm
AET
1 143mm
Mean slope
1,8°
Water table
64cm
Forest
26%
Crops
58%
Urban
2%
Protected
45%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)