HydroBASINS lev08 watershed · #1080896430
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 2 administrative regions : Bo, Kenema
Sub-basin area
387,2km²
Upstream area
8 890,7km²
Discharge
422,56m³/s
Mean elev.
236m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sewa502 km²
- Bassin de Stream270 km²
2 dept-equivalent regions (GADM L2)
- 216.7 km²56.2% of basin
- 168.9 km²43.8% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
75 distinct species · 100 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°
25,5°C
Annual rain
2 753mm
Moisture idx (CMI)
0,38
Runoff
1 702mm/an
PET
1 695mm
AET
1 294mm
Mean slope
5,0°
Water table
190cm
Forest
1%
Crops
3%
Urban
8%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)