HydroBASINS lev08 watershed · #1080952710
Bassin de Twewaa Stream
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 : Atiwa East, Fanteakwa North, Kwahu Afram Plains South, Kwahu South, Kwahu West
Sub-basin area
444,8km²
Upstream area
444,8km²
Discharge
3,9m³/s
Mean elev.
426m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 210.0 km²47.4% of basin
- 204.0 km²46.1% of basin
- 26.3 km²5.9% of basin
- 2.0 km²0.4% of basin
- 0.6 km²0.1% of basin
8 intersecting protected areas
Worobong North (Akim)
IUCN VIForest Reserve
130.21 km² overlap
Worobong South (Akim)
IUCN VIForest Reserve
82.37 km² overlap
Worobong South (Kwahu)
IUCN VIForest Reserve
40.67 km² overlap
Southern Scarp (Akim)
IUCN IVForest Reserve
26.25 km² overlap
Worobong North (Kwahu)
IUCN VIForest Reserve
11.26 km² overlap
Abisu
IUCN IVForest Reserve
6.98 km² overlap
Southern Scarp (Kwahu)
IUCN IVForest Reserve
6.32 km² overlap
Dede
IUCN IVForest Reserve
0.99 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
114 distinct species · 199 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 Twewaa Stream : 11 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 11 interactions GloBI sur 1 type (connectance 14.1%, filtre Serrano α=0.2). 2 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°
24,1°C
Annual rain
1 547mm
Moisture idx (CMI)
-0,04
Runoff
278mm/an
PET
1 622mm
AET
1 251mm
Mean slope
5,4°
Water table
294cm
Forest
41%
Crops
33%
Urban
3%
Protected
51%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)