HydroBASINS lev08 watershed · #1080715290
Bassin de Casamance
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 across 2 countries : Bigene, Farim, Goudomp, Sédhiou
Sub-basin area
628,5km²
Upstream area
6 980,4km²
Discharge
36,29m³/s
Mean elev.
25m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Casamance2432 km²
- Bassin de Casamance480 km²
4 dept-equivalent regions (GADM L2)
- 424.2 km²67.8% of basin
- 111.3 km²17.8% of basin
- BigeneCacheu · Guinea-Bissau51.0 km²8.1% of basin
- 39.6 km²6.3% of basin
2 intersecting protected areas
AMP Kassa-Balantacounda
IUCN VIMarine Protected Area
126.29 km² overlap
Foret de Mangaroungou
IUCN Not ReportedForest Reserve
9.92 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
89 distinct species · 987 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Bassin de Casamance : 22 espèces reliées par 35 interactions GloBI sur 3 types (connectance 8.6%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
26,8°C
Annual rain
1 251mm
Moisture idx (CMI)
-0,34
Runoff
461mm/an
PET
1 897mm
AET
812mm
Mean slope
0,8°
Water table
84cm
Forest
42%
Crops
15%
Urban
2%
Protected
2%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)