HydroBASINS lev08 watershed · #1080616660
Bassin de Tchangol Alas
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 3 administrative regions across 2 countries : Kanel, Maghama, Sélibaby
Sub-basin area
476km²
Upstream area
332 168,4km²
Discharge
474,13m³/s
Mean elev.
49m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sénégal السنغال1607 km²
- Bassin de Tchangol Tsiaki422 km²
3 dept-equivalent regions (GADM L2)
- 419.3 km²88.4% of basin
- 28.3 km²6.0% of basin
- 26.7 km²5.6% of basin
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
138 distinct species · 400 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 25 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 Tchangol Alas : 21 espèces reliées par 22 interactions GloBI sur 3 types (connectance 7.3%, filtre Serrano α=0.2). 4 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°
28,7°C
Annual rain
519mm
Moisture idx (CMI)
-0,76
Runoff
118mm/an
PET
2 125mm
AET
436mm
Mean slope
0,4°
Water table
92cm
Forest
0%
Crops
11%
Urban
1%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)