HydroBASINS lev08 watershed · #5080575990
Bassin de Williams 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 5 administrative regions : Dungog, Gloucester, Great Lakes, Maitland, Port Stephens
Sub-basin area
1 273,8km²
Upstream area
1 273,8km²
Discharge
9,8m³/s
Mean elev.
228m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
5 dept-equivalent regions (GADM L2)
- 1098.9 km²86.3% of basin
- 161.6 km²12.7% of basin
- 8.8 km²0.7% of basin
- 3.0 km²0.2% of basin
- 0.6 km²0.0% of basin
9 intersecting protected areas
Barrington Tops
IUCN IbNational Park
199.88 km² overlap
Gondwana Rainforests of Australia
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
176.43 km² overlap
Wallaroo
IUCN IINational Park
16.51 km² overlap
Columbey
IUCN IINational Park
12.85 km² overlap
Black Bulga
IUCN IIState Conservation Area
10.08 km² overlap
Monkerai
IUCN IaNature Reserve
6.59 km² overlap
Killarney
IUCN IaNature Reserve
4.35 km² overlap
Columbey
IUCN IIState Conservation Area
2.40 km² overlap
Seaham Swamp
IUCN IVNature Reserve
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 539 distinct species · 156 176 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 Williams River : 22 espèces reliées par 42 interactions GloBI sur 4 types (connectance 10.3%, filtre Serrano α=0.2). 7 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°
16,8°C
Annual rain
1 108mm
Moisture idx (CMI)
-0,14
Runoff
244mm/an
PET
1 293mm
AET
932mm
Mean slope
8,1°
Water table
369cm
Forest
86%
Crops
0%
Urban
0%
Protected
20%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)