HydroBASINS lev08 watershed · #1081218510
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 : Loudima, Louvakou (Loubomo), Mossendjo, Sibiti
Sub-basin area
221,3km²
Upstream area
27 622,8km²
Discharge
419,86m³/s
Mean elev.
167m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Niari483 km²
- Bassin de Niari126 km²
4 dept-equivalent regions (GADM L2)
- 123.5 km²56.1% of basin
- 68.1 km²30.9% of basin
- 18.8 km²8.5% of basin
- 9.8 km²4.5% of basin
2 intersecting protected areas
Vallée du Niari
IUCN Not ReportedWetland of International Importance (Ramsar Site)
31.01 km² overlap
Tsoulou
IUCN IVWildlife Reserve
2.56 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
0 distinct species · 0 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°
25,3°C
Annual rain
1 292mm
Moisture idx (CMI)
-0,17
Runoff
333mm/an
PET
1 560mm
AET
1 091mm
Mean slope
5,3°
Water table
309cm
Forest
87%
Crops
0%
Urban
3%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)