HydroBASINS lev08 watershed · #1080014750
Bassin de Hoëkraalrivier
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 : Eden
Sub-basin area
422,2km²
Upstream area
422,2km²
Discharge
1,37m³/s
Mean elev.
357m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 420.8 km²99.7% of basin
13 intersecting protected areas
Wilderness National Lake Area
IUCN Not ReportedProtected Environment
77.40 km² overlap
Garden Route National Park
IUCN Not ReportedNational Park
76.02 km² overlap
Cape Floral Region Protected Areas
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
60.05 km² overlap
Goukamma Provincial Nature Reserve
IUCN Not ReportedNature Reserve
7.22 km² overlap
Wilderness Lakes
IUCN IIWetland of International Importance (Ramsar Site)
2.00 km² overlap
Black River Private Nature Reserve
IUCN Not ReportedNature Reserve
1.55 km² overlap
Church Millwood Nature Reserve
IUCN Not ReportedForest Nature Reserve
0.97 km² overlap
Lake Pleasant Private Nature Reserve Section No.2
IUCN Not ReportedNature Reserve
0.82 km² overlap
Lake Pleasant Private Nature Reserve Section No.6
IUCN Not ReportedNature Reserve
0.10 km² overlap
4 more protected areassorted by overlap area
Otters Creek Private Nature Reserve
IUCN Not ReportedNature Reserve
0.04 km² overlap
Lake Pleasant Private Nature Reserve
IUCN Not ReportedNature Reserve
0.04 km² overlap
Bosnes Private Nature Reserve
IUCN Not ReportedNature Reserve
0.04 km² overlap
Lake Pleasant Private Nature Reserve Section No.3
IUCN Not ReportedNature Reserve
0.03 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 777 distinct species · 126 727 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 Hoëkraalrivier : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 20 interactions GloBI sur 5 types (connectance 4.9%, filtre Serrano α=0.2). 3 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°
16,0°C
Annual rain
780mm
Moisture idx (CMI)
-0,32
Runoff
102mm/an
PET
1 151mm
AET
663mm
Mean slope
10,6°
Water table
493cm
Forest
60%
Crops
3%
Urban
2%
Protected
20%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)