HydroBASINS lev08 watershed · #7080055920
Bassin de Ash 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 3 administrative regions : Alberni-Clayoquot, Comox-Strathcona, Nanaimo
Sub-basin area
1 437,3km²
Upstream area
1 437,3km²
Discharge
130,05m³/s
Mean elev.
527m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 1391.0 km²96.5% of basin
- 26.5 km²1.8% of basin
- Nanaimo24.1 km²1.7% of basin
11 intersecting protected areas
STRATHCONA PARK
IUCN IIA - Park
246.34 km² overlap
Old Growth Management Areas (Mapped Legal)
IUCN Not ApplicableOld Growth Management Areas (Mapped Legal)
26.70 km² overlap
Wildlife Habitat Areas
IUCN Not ApplicableWildlife Habitat Areas
3.61 km² overlap
STAMP RIVER PARK
IUCN IIIA - Park
3.46 km² overlap
TAYLOR ARM PARK
IUCN IIA - Park
0.73 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.71 km² overlap
Somass
IUCN IVPrivately Owned Conservation Area
0.68 km² overlap
FOSSLI PARK
IUCN IIA - Park
0.52 km² overlap
SPROAT LAKE PARK
IUCN Not ReportedA - Park
0.40 km² overlap
2 more protected areassorted by overlap area
ʔUUʔINMITIS CONSERVANCY
IUCN IIConservancy
0.22 km² overlap
Ecological Reserve
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 841 distinct species · 154 833 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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 Ash River : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 97 interactions GloBI sur 4 types (connectance 11.3%, filtre Serrano α=0.2). 16 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°
7,0°C
Annual rain
2 074mm
Moisture idx (CMI)
0,66
Runoff
2 357mm/an
PET
689mm
AET
583mm
Mean slope
16,5°
Water table
698cm
Forest
76%
Crops
0%
Urban
1%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)