HydroBASINS lev08 watershed · #1080025050
Bassin de Sewa
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 : Bonthe
Sub-basin area
273,8km²
Upstream area
18 539,2km²
Discharge
946,27m³/s
Mean elev.
9m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Sewa1079 km²
- Bassin de Waanje534 km²
1 dept-equivalent regions (GADM L2)
- 272.6 km²100.0% of basin
1 intersecting protected areas
Sherbro River Estuary
IUCN Not ReportedMarine Protected Area
1.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 distinct species · 12 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°
26,8°C
Annual rain
3 636mm
Moisture idx (CMI)
0,59
Runoff
2 002mm/an
PET
1 495mm
AET
1 178mm
Mean slope
0,5°
Water table
31cm
Forest
17%
Crops
5%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)