HydroBASINS lev08 watershed · #1081365950
Bassin de Cassema
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 : Bocoio, Sumbe
Sub-basin area
370,7km²
Upstream area
370,9km²
Discharge
3,31m³/s
Mean elev.
1 058m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
2 dept-equivalent regions (GADM L2)
- BocoioBenguela · Angola316.7 km²85.8% of basin
- Sumbe52.5 km²14.2% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 distinct species · 1 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°
23,2°C
Annual rain
1 047mm
Moisture idx (CMI)
-0,35
Runoff
285mm/an
PET
1 601mm
AET
886mm
Mean slope
6,4°
Water table
478cm
Forest
96%
Crops
3%
Urban
0%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)