HydroBASINS lev08 watershed · #1081223570
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 3 administrative regions : Kimongo, Loudima, Louvakou (Loubomo)
Sub-basin area
1 119,4km²
Upstream area
1 119,5km²
Discharge
10,71m³/s
Mean elev.
265m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
3 dept-equivalent regions (GADM L2)
- 1097.0 km²98.4% of basin
- 17.0 km²1.5% of basin
- 0.5 km²0.0% of basin
2 intersecting protected areas
Vallée du Niari
IUCN Not ReportedWetland of International Importance (Ramsar Site)
207.38 km² overlap
Tsoulou
IUCN IVWildlife Reserve
29.37 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
17 distinct species · 27 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°
24,9°C
Annual rain
1 245mm
Moisture idx (CMI)
-0,18
Runoff
300mm/an
PET
1 515mm
AET
1 047mm
Mean slope
2,9°
Water table
197cm
Forest
30%
Crops
1%
Urban
0%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)