HydroBASINS lev08 watershed · #5080056470
Bassin de Balgay Branch Drain
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 15 administrative regions : Cambridge, Chittering, Claremont, Cockburn, Cottesloe +10
Sub-basin area
1 048,4km²
Upstream area
1 048,4km²
Discharge
0,17m³/s
Mean elev.
49m
Administrative coverage
15 dept-equivalent regions (GADM L2)
- 577.3 km²55.1% of basin
- 175.6 km²16.8% of basin
- 98.9 km²9.4% of basin
- 74.8 km²7.1% of basin
- 44.0 km²4.2% of basin
- 19.1 km²1.8% of basin
- 12.2 km²1.2% of basin
- 10.4 km²1.0% of basin
7 moreFull L2 list
- Nedlands3.4 km² · 0.3%
- Cottesloe3.1 km² · 0.3%
- Mosman Park1.7 km² · 0.2%
- Fremantle1.3 km² · 0.1%
- Claremont0.3 km² · 0.0%
- Vincent0.1 km² · 0.0%
- Peppermint Grove0.1 km² · 0.0%
23 intersecting protected areas
Yeal
IUCN IaNature Reserve
39.67 km² overlap
Yanchep
IUCN IINational Park
29.13 km² overlap
Unnamed WA49994
IUCN IIConservation Park
27.73 km² overlap
Rottnest Island
IUCN Not AssignedState Reserve
27.56 km² overlap
Neerabup
IUCN IINational Park
9.73 km² overlap
Lake Joondalup
IUCN IaNature Reserve
4.44 km² overlap
Marmion
IUCN IIMarine Park
4.13 km² overlap
Bold Park
IUCN Not AssignedBotanic Gardens
1.87 km² overlap
Neerabup
IUCN IaNature Reserve
1.32 km² overlap
14 more protected areassorted by overlap area
Woodvale
IUCN IV5(1)(h) Reserve
0.38 km² overlap
Unnamed WA43290
IUCN IIConservation Park
0.27 km² overlap
Unnamed WA21176
IUCN VI5(1)(h) Reserve
0.11 km² overlap
Swan River
IUCN Not AssignedManagement Area
0.09 km² overlap
Unnamed WA31906
IUCN IaNature Reserve
0.05 km² overlap
Lake Joondalup
IUCN IaNature Reserve
0.04 km² overlap
Unnamed WA52237
IUCN II5(1)(h) Reserve
0.02 km² overlap
Unnamed WA50067
IUCN VI5(1)(h) Reserve
0.01 km² overlap
Unnamed WA50514
IUCN VI5(1)(h) Reserve
0.01 km² overlap
Marmion
IUCN IaMarine Park
0.01 km² overlap
Unnamed WA46926
IUCN V5(1)(h) Reserve
0.01 km² overlap
Unnamed WA46756
IUCN IIConservation Park
0.01 km² overlap
Unnamed WA45772
IUCN V5(1)(h) Reserve
0.00 km² overlap
Unnamed WA45773
IUCN V5(1)(h) Reserve
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 559 distinct species · 506 157 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 Balgay Branch Drain : 21 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 29 interactions GloBI sur 4 types (connectance 6.7%, 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°
18,4°C
Annual rain
742mm
Moisture idx (CMI)
-0,45
Runoff
254mm/an
PET
1 344mm
AET
614mm
Mean slope
1,4°
Water table
228cm
Forest
53%
Crops
3%
Urban
25%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)