HydroBASINS lev08 watershed · #1081159970
Bassin de Oronga
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 1 administrative regions : Ogooué et des Lacs
Sub-basin area
225,2km²
Upstream area
1 248,6km²
Discharge
44,86m³/s
Mean elev.
36m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Rembo Azingo720 km²
- Bassin · #1081157430304 km²
1 dept-equivalent regions (GADM L2)
- 224.2 km²100.0% of basin
3 intersecting protected areas
Wonga-Wongué
IUCN IVWetland of International Importance (Ramsar Site)
131.75 km² overlap
Reserve Présidentielle Wonga Wongué
IUCN Not ReportedPresidential reserve
131.75 km² overlap
Bas Ogooue
IUCN Not ReportedWetland of International Importance (Ramsar Site)
92.47 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
11 distinct species · 21 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°
26,0°C
Annual rain
2 098mm
Moisture idx (CMI)
0,29
Runoff
1 139mm/an
PET
1 499mm
AET
1 274mm
Mean slope
2,7°
Water table
78cm
Forest
88%
Crops
4%
Urban
0%
Protected
59%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)