HydroBASINS lev08 watershed · #5080592690
Bassin de Blackwood 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 2 administrative regions : Augusta-Margaret River, Nannup
Sub-basin area
1 737,4km²
Upstream area
21 789,4km²
Discharge
34,99m³/s
Mean elev.
93m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de St John Brook560 km²
- Bassin de Blackwood River419 km²
2 dept-equivalent regions (GADM L2)
- 900.9 km²51.9% of basin
- 836.0 km²48.1% of basin
13 intersecting protected areas
Blackwood River
IUCN IINational Park
203.52 km² overlap
Milyeannup
IUCN IINational Park
179.26 km² overlap
Wiltshire-Butler
IUCN IINational Park
116.49 km² overlap
Leeuwin-Naturaliste
IUCN IINational Park
31.63 km² overlap
Hilliger
IUCN IINational Park
19.74 km² overlap
Unnamed WA46400
IUCN IINational Park
15.71 km² overlap
Forest Grove
IUCN IINational Park
13.79 km² overlap
Scott
IUCN IINational Park
9.19 km² overlap
Easter
IUCN IINational Park
7.70 km² overlap
4 more protected areassorted by overlap area
Bramley
IUCN IINational Park
2.61 km² overlap
Conservation Covenant
0.31 km² overlap
Unnamed WA12952
IUCN VI5(1)(h) Reserve
0.20 km² overlap
Unnamed WA08910
IUCN V5(1)(h) Reserve
0.08 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 079 distinct species · 23 766 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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 Blackwood River : 28 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 43 interactions GloBI sur 3 types (connectance 6.1%, filtre Serrano α=0.2). 10 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
1 015mm
Moisture idx (CMI)
-0,11
Runoff
583mm/an
PET
1 139mm
AET
668mm
Mean slope
2,1°
Water table
140cm
Forest
93%
Crops
1%
Urban
0%
Protected
35%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)