HydroBASINS lev08 watershed · #1080980110
Bassin de Volta
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 5 administrative regions : Ada East, Ada West, Central Tongu, North Tongu, South Tongu
Sub-basin area
407,8km²
Upstream area
408 773,3km²
Discharge
994,59m³/s
Mean elev.
17m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Agoriki1368 km²
- Bassin de Volta197 km²
5 dept-equivalent regions (GADM L2)
- 183.4 km²45.2% of basin
- 128.5 km²31.6% of basin
- 68.7 km²16.9% of basin
- 21.0 km²5.2% of basin
- 4.5 km²1.1% of basin
1 intersecting protected areas
Songor Ramsar Site
IUCN IVWetland of International Importance (Ramsar Site)
8.09 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
410 distinct species · 742 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 6 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 Volta : 6 espèces reliées par 3 interactions GloBI sur 1 type (connectance 20.0%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
27,1°C
Annual rain
978mm
Moisture idx (CMI)
-0,38
Runoff
143mm/an
PET
1 572mm
AET
828mm
Mean slope
0,6°
Water table
47cm
Forest
8%
Crops
38%
Urban
11%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)