HydroBASINS lev08 watershed · #1081180570
Bassin de Ovangué
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 : Ndolou, Ogooué et des Lacs, Tsamba Mangotsi
Sub-basin area
1 347,7km²
Upstream area
1 347,9km²
Discharge
53,35m³/s
Mean elev.
145m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1329.9 km²99.1% of basin
- 11.8 km²0.9% of basin
- 0.0 km²0.0% of basin
1 intersecting protected areas
Bas Ogooue
IUCN Not ReportedWetland of International Importance (Ramsar Site)
1.49 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
273 distinct species · 1 552 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
25,6°C
Annual rain
2 037mm
Moisture idx (CMI)
0,17
Runoff
1 121mm/an
PET
1 687mm
AET
1 391mm
Mean slope
5,3°
Water table
238cm
Forest
100%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)