HydroBASINS lev08 watershed · #1080928290
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, Bonthe
Sub-basin area
1 079,1km²
Upstream area
14 013,3km²
Discharge
705,07m³/s
Mean elev.
29m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Tabe1862 km²
- Bassin de Sewa731 km²
2 dept-equivalent regions (GADM L2)
- 626.5 km²58.3% of basin
- 448.0 km²41.7% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
180 distinct species · 844 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 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 Sewa : 13 espèces reliées par 13 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 3 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
3 180mm
Moisture idx (CMI)
0,50
Runoff
1 893mm/an
PET
1 569mm
AET
1 210mm
Mean slope
1,2°
Water table
35cm
Forest
8%
Crops
6%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)