HydroBASINS lev08 watershed · #1080015230
Bassin de Eerste 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 : Cape Winelands, City of Cape Town
Sub-basin area
628,8km²
Upstream area
628,8km²
Discharge
8,84m³/s
Mean elev.
199m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- 416.1 km²66.2% of basin
- City of Cape Town212.4 km²33.8% of basin
11 intersecting protected areas
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
47.67 km² overlap
Hottentotsholland Nature Reserve
IUCN Not ReportedForest Nature Reserve
42.94 km² overlap
Hottentots-Holland Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
15.06 km² overlap
Driftsands Nature Reserve
IUCN Not ReportedNature Reserve
3.30 km² overlap
Koopmanskloof Private Nature Reserve
IUCN Not ReportedNature Reserve
2.91 km² overlap
Mooiplaas Private Nature Reserve
IUCN Not ReportedNature Reserve
2.36 km² overlap
Assegaaibos Provincial Nature Reserve
IUCN Not ReportedNature Reserve
1.97 km² overlap
Papegaaiberg Nature Reserve
IUCN Not ReportedNature Reserve
1.39 km² overlap
Bracken Nature Reserve
IUCN Not ReportedNature Reserve
0.40 km² overlap
2 more protected areassorted by overlap area
Durbanville Nature Reserve
IUCN Not ReportedNature Reserve
0.06 km² overlap
Helderberg Marine Protected Area
IUCN Not ReportedMarine Protected Area
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 860 distinct species · 262 236 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Eerste River : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 35 interactions GloBI sur 4 types (connectance 6.6%, filtre Serrano α=0.2). 9 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°
16,3°C
Annual rain
785mm
Moisture idx (CMI)
-0,37
Runoff
412mm/an
PET
1 245mm
AET
630mm
Mean slope
6,0°
Water table
443cm
Forest
27%
Crops
35%
Urban
36%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)