HydroBASINS lev08 watershed · #1081223410
Bassin de Niari
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 : Kibangou, Loudima, Louvakou (Loubomo), Mossendjo
Sub-basin area
1 216km²
Upstream area
49 609,1km²
Discharge
803,43m³/s
Mean elev.
129m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Niari2141 km²
- Bassin de Niari118 km²
4 dept-equivalent regions (GADM L2)
- 571.1 km²47.2% of basin
- 531.4 km²43.9% of basin
- 108.0 km²8.9% of basin
- 0.2 km²0.0% of basin
2 intersecting protected areas
Vallée du Niari
IUCN Not ReportedWetland of International Importance (Ramsar Site)
305.46 km² overlap
Tsoulou
IUCN IVWildlife Reserve
219.91 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
64 distinct species · 278 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
1 235mm
Moisture idx (CMI)
-0,21
Runoff
345mm/an
PET
1 564mm
AET
1 044mm
Mean slope
1,6°
Water table
120cm
Forest
33%
Crops
1%
Urban
0%
Protected
18%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)