HydroBASINS lev08 watershed · #5080079250
Bassin de Nelson Bay 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 1 administrative regions : Circular Head
Sub-basin area
123km²
Upstream area
123,1km²
Discharge
3,45m³/s
Mean elev.
118m
Administrative coverage
1 dept-equivalent regions (GADM L2)
- 123.1 km²99.9% of basin
3 intersecting protected areas
Arthur-Pieman
IUCN VIConservation Area
72.22 km² overlap
Rebecca Creek
IUCN IVConservation Area
1.98 km² overlap
Sundown Point
IUCN IIIState Reserve
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
729 distinct species · 3 864 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 44 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 Nelson Bay River : 36 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 45 interactions GloBI sur 5 types (connectance 4.5%, 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°
12,0°C
Annual rain
1 336mm
Moisture idx (CMI)
0,38
Runoff
889mm/an
PET
818mm
AET
702mm
Mean slope
1,8°
Water table
93cm
Forest
100%
Crops
0%
Urban
0%
Protected
60%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)