HydroBASINS lev08 watershed · #1080015240
Bassin de Spaanschemat
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 1 administrative regions : City of Cape Town
Sub-basin area
638,2km²
Upstream area
638,2km²
Discharge
4,42m³/s
Mean elev.
122m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- City of Cape Town598.2 km²93.8% of basin
20 intersecting protected areas
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
232.45 km² overlap
Table Mountain National Park
IUCN Not ReportedNational Park
212.27 km² overlap
Cape of Good Hope Nature Reserve
IUCN Not ReportedNature Reserve
79.92 km² overlap
Cape Peninsula Nature Area
IUCN Not ReportedNature Reserve
53.00 km² overlap
Table Mountain Nature Reserve
IUCN Not ReportedNature Reserve
30.92 km² overlap
Table Mountain National Park Marine Protected Area
IUCN Not ReportedMarine Protected Area
30.03 km² overlap
False Bay Nature Reserve
IUCN Not ReportedNature Reserve
17.64 km² overlap
Silvermine Nature Reserve
IUCN Not ReportedNature Reserve
16.80 km² overlap
False Bay Nature Reserve
IUCN VIWetland of International Importance (Ramsar Site)
15.38 km² overlap
11 more protected areassorted by overlap area
Zeekoevlei Local Nature Reserve
IUCN Not ReportedNature Reserve
4.21 km² overlap
Wolfgat Nature Reserve
IUCN Not ReportedNature Reserve
2.60 km² overlap
Driftsands Nature Reserve
IUCN Not ReportedNature Reserve
1.04 km² overlap
Rondevlei Bird Sanctuary
IUCN Not ReportedNature Reserve
1.00 km² overlap
Greater Zandvlei Estuary Nature Reserve
IUCN Not ReportedNature Reserve
0.23 km² overlap
Red Hill Fynbos Private Nature Reserve
IUCN Not ReportedNature Reserve
0.21 km² overlap
Eagle's Rest Private Nature Reserve
IUCN Not ReportedNature Reserve
0.19 km² overlap
Robben island Marine Protected Area
IUCN Not ReportedMarine Protected Area
0.16 km² overlap
Helderberg Marine Protected Area
IUCN Not ReportedMarine Protected Area
0.04 km² overlap
False Bay Seal Island Provincial Nature Reserve
IUCN Not ReportedNature Reserve
0.03 km² overlap
Duikerklip Provincial Nature Reserve
IUCN Not ReportedNature Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
9 613 distinct species · 1 131 287 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Spaanschemat : 30 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 4 types (connectance 4.9%, 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
824mm
Moisture idx (CMI)
-0,26
Runoff
431mm/an
PET
1 111mm
AET
634mm
Mean slope
7,0°
Water table
482cm
Forest
23%
Crops
14%
Urban
48%
Protected
43%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)