HydroBASINS lev08 watershed · #1080014220
Bassin de Great Fish 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 2 administrative regions : Amathole, Cacadu
Sub-basin area
13,4km²
Upstream area
30 263,2km²
Discharge
25,92m³/s
Mean elev.
51m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de Great Fish River301 km²
- Bassin de Kap River174 km²
2 dept-equivalent regions (GADM L2)
- 8.8 km²65.8% of basin
- 4.2 km²31.1% of basin
1 intersecting protected areas
Great Fish River Mouth Wetland Nature Reserve
IUCN Not ReportedNature Reserve
2.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
595 distinct species · 8 166 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Great Fish River : 23 espèces reliées par 29 interactions GloBI sur 2 types (connectance 7.1%, filtre Serrano α=0.2). 6 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°
18,1°C
Annual rain
574mm
Moisture idx (CMI)
-0,48
Runoff
98mm/an
PET
1 095mm
AET
491mm
Mean slope
3,6°
Water table
355cm
Forest
55%
Crops
7%
Urban
0%
Protected
15%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)