HydroBASINS lev08 watershed · #1080935420
Bassin de Oranyan
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 : Aiyedade, Irewole, Isokan
Sub-basin area
154,6km²
Upstream area
154,6km²
Discharge
3,51m³/s
Mean elev.
191m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 117.9 km²76.6% of basin
- 23.5 km²15.3% of basin
- 12.5 km²8.1% of basin
1 intersecting protected areas
Ago-Owu
IUCN Not ReportedForest Reserve
2.74 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
85 distinct species · 275 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 Oranyan : 12 espèces reliées par 12 interactions GloBI sur 1 type (connectance 15.4%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
26,5°C
Annual rain
1 429mm
Moisture idx (CMI)
-0,12
Runoff
716mm/an
PET
1 622mm
AET
1 103mm
Mean slope
1,9°
Water table
93cm
Forest
13%
Crops
24%
Urban
1%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)