HydroBASINS lev08 watershed · #1080013810
Bassin de Ntlonyane
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 : Amathole
Sub-basin area
156,7km²
Upstream area
156,8km²
Discharge
1,8m³/s
Mean elev.
200m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 152.0 km²97.0% of basin
2 intersecting protected areas
Dwesa-Cwebe Nature Reserve
IUCN Not ReportedNature Reserve
16.31 km² overlap
Dwesa-Cwebe Marine Protected Area
IUCN Not ReportedMarine Protected Area
4.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 020 distinct species · 5 149 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 19 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 Ntlonyane : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 17 interactions GloBI sur 3 types (connectance 9.9%, 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°
18,6°C
Annual rain
1 036mm
Moisture idx (CMI)
-0,07
Runoff
362mm/an
PET
1 113mm
AET
878mm
Mean slope
5,8°
Water table
430cm
Forest
26%
Crops
15%
Urban
0%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)