HydroBASINS lev08 watershed · #1080980060
Bassin de Bia
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 7 administrative regions across 2 countries : Aowin, Bia West, Bodi, Juaboso, Sefwi-Akontombra +2
Sub-basin area
1 157km²
Upstream area
6 762,9km²
Discharge
75,33m³/s
Mean elev.
155m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Bia2136 km²
- Bassin · #10809743001386 km²
7 dept-equivalent regions (GADM L2)
- 343.1 km²29.8% of basin
- 321.2 km²27.9% of basin
- 280.2 km²24.3% of basin
- 105.7 km²9.2% of basin
- 74.3 km²6.4% of basin
- 21.3 km²1.9% of basin
- 6.3 km²0.5% of basin
6 intersecting protected areas
Bia Tawya
IUCN VIForest Reserve
414.96 km² overlap
Bia National Park
IUCN IINational Park
127.00 km² overlap
Bia National Park
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
121.82 km² overlap
Bia Resource Reserve
IUCN VIResource Reserve
120.60 km² overlap
Dadieso
IUCN IIIForest Reserve
61.31 km² overlap
Bodi
IUCN VIForest Reserve
22.91 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
547 distinct species · 2 016 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 Bia : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 24 interactions GloBI sur 3 types (connectance 4.8%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
26,6°C
Annual rain
1 549mm
Moisture idx (CMI)
-0,05
Runoff
415mm/an
PET
1 623mm
AET
1 247mm
Mean slope
2,6°
Water table
88cm
Forest
12%
Crops
17%
Urban
1%
Protected
54%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)