HydroBASINS lev08 watershed · #1081614480
Bassin de Gaab
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 3 administrative regions : Berseba, Karas, Keetmanshoop Rural
Sub-basin area
75,2km²
Upstream area
59 068,1km²
Discharge
13,9m³/s
Mean elev.
619m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Sputloop539 km²
- Bassin de Fish River361 km²
3 dept-equivalent regions (GADM L2)
- 43.2 km²57.6% of basin
- 20.9 km²27.9% of basin
- 10.9 km²14.6% of basin
2 intersecting protected areas
Ai-Ais Hot Springs
IUCN IINational Park
22.63 km² overlap
Gondwana
IUCN Not ReportedPrivate Reserve
8.87 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
50 distinct species · 72 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 10 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 Gaab : 9 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 5 interactions GloBI sur 2 types (connectance 11.1%, 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°
20,3°C
Annual rain
88mm
Moisture idx (CMI)
-0,95
Runoff
12mm/an
PET
1 716mm
AET
72mm
Mean slope
5,3°
Water table
624cm
Forest
0%
Crops
0%
Urban
0%
Protected
42%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)