HydroBASINS lev08 watershed · #1080679380
Bassin de Gambia River
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 10 administrative regions across 2 countries : Kaffrine, Lower Saloum, Médina Yoro Foula, Niamina Dankunku, Niamina East +5
Sub-basin area
770,3km²
Upstream area
65 508,9km²
Discharge
138,1m³/s
Mean elev.
20m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Nianija Bolon799 km²
- Bassin de Gambia River410 km²
10 dept-equivalent regions (GADM L2)
- 149.4 km²19.5% of basin
- 128.9 km²16.8% of basin
- 123.9 km²16.1% of basin
- 119.7 km²15.6% of basin
- 90.6 km²11.8% of basin
- 81.5 km²10.6% of basin
- 37.4 km²4.9% of basin
- Nioro du RipKaolack · Senegal16.6 km²2.2% of basin
2 moreFull L2 list
- Nianija12.1 km² · 1.6%
- Médina Yoro Foula7.4 km² · 1.0%
3 intersecting protected areas
Foret de Ndankou
IUCN Not ReportedForest Reserve
14.84 km² overlap
Foret de Ngayene
IUCN Not ReportedForest Reserve
7.66 km² overlap
Barrow Kunda
IUCN VICommunity Protected Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
423 distinct species · 13 088 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 19 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 Gambia River : 14 espèces reliées par 24 interactions GloBI sur 2 types (connectance 11.4%, 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°
27,6°C
Annual rain
685mm
Moisture idx (CMI)
-0,67
Runoff
52mm/an
PET
2 071mm
AET
577mm
Mean slope
0,5°
Water table
75cm
Forest
1%
Crops
32%
Urban
2%
Protected
3%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)