HydroBASINS lev08 watershed · #1080015200
Bassin de Lourens
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 : Cape Winelands, City of Cape Town, Overberg
Sub-basin area
434,3km²
Upstream area
434,3km²
Discharge
4,37m³/s
Mean elev.
300m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- City of Cape Town289.8 km²66.7% of basin
- 118.5 km²27.3% of basin
- 9.1 km²2.1% of basin
14 intersecting protected areas
Hottentots-Holland Mountain Catchment Area
IUCN Not ReportedMountain Catchment Area
116.65 km² overlap
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
85.02 km² overlap
Steenbras Nature Reserve
IUCN Not ReportedNature Reserve
76.09 km² overlap
Lourens River Protected Natural Environment
IUCN Not ReportedProtected Environment
44.12 km² overlap
Vergelegen Nature Reserve
IUCN Not ReportedNature Reserve
29.85 km² overlap
Hottentotsholland Nature Reserve
IUCN Not ReportedForest Nature Reserve
18.55 km² overlap
Kogelberg Nature Reserve
IUCN Not ReportedNature Reserve
7.78 km² overlap
Helderberg Nature Reserve
IUCN Not ReportedNature Reserve
2.90 km² overlap
Land-en-Zeezicht Nature Reserve
IUCN Not ReportedNature Reserve
2.85 km² overlap
5 more protected areassorted by overlap area
Betty's Bay Marine Protected Area
IUCN Not ReportedMarine Protected Area
1.55 km² overlap
Brodie Link Provincial Nature Reserve
IUCN Not ReportedNature Reserve
0.92 km² overlap
Helderberg Marine Protected Area
IUCN Not ReportedMarine Protected Area
0.39 km² overlap
Harmony Flats Provincial Nature Reserve
IUCN Not ReportedNature Reserve
0.09 km² overlap
Rooi Els Nature Reserve
IUCN Not ReportedNature Reserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
6 106 distinct species · 386 869 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 Lourens : 31 espèces reliées par 27 interactions GloBI sur 4 types (connectance 4.5%, filtre Serrano α=0.2). 4 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°
15,4°C
Annual rain
855mm
Moisture idx (CMI)
-0,23
Runoff
452mm/an
PET
1 121mm
AET
645mm
Mean slope
10,8°
Water table
536cm
Forest
39%
Crops
11%
Urban
17%
Protected
72%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)