HydroBASINS lev08 watershed · #1081163540
Bassin de Ngounié
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
2 146,8km²
Upstream area
23 654,3km²
Discharge
759,93m³/s
Mean elev.
205m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Ovigui2239 km²
- Bassin de Ngounié139 km²
3 dept-equivalent regions (GADM L2)
- 2124.4 km²99.4% of basin
- 12.6 km²0.6% of basin
- 0.2 km²0.0% of basin
1 intersecting protected areas
Bas Ogooue
IUCN Not ReportedWetland of International Importance (Ramsar Site)
0.25 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
841 distinct species · 4 913 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°
25,5°C
Annual rain
2 046mm
Moisture idx (CMI)
0,16
Runoff
1 044mm/an
PET
1 721mm
AET
1 429mm
Mean slope
7,5°
Water table
289cm
Forest
100%
Crops
1%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)