HydroBASINS lev08 watershed · #7080056950
Bassin de Chemainus 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 : Capital, Cowichan Valley, Nanaimo
Sub-basin area
1 246,3km²
Upstream area
1 246,3km²
Discharge
5,33m³/s
Mean elev.
263m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 626.7 km²50.1% of basin
- 361.5 km²28.9% of basin
- Nanaimo99.6 km²8.0% of basin
30 intersecting protected areas
National Park
25.28 km² overlap
RUCKLE PARK
IUCN IIA - Park
5.32 km² overlap
BURGOYNE BAY PARK
IUCN IIA - Park
5.01 km² overlap
Ecological Reserve
4.18 km² overlap
Ecological Reserve
3.62 km² overlap
BODEGA RIDGE PARK
IUCN IIA - Park
3.21 km² overlap
Regional Park
3.16 km² overlap
Mount Maxwell - Phase II
IUCN IVPrivately Owned Conservation Area
2.74 km² overlap
MOUNT MAXWELL PARK
IUCN IIA - Park
2.34 km² overlap
21 more protected areassorted by overlap area
Wildlife Habitat Areas
IUCN Not ApplicableWildlife Habitat Areas
2.09 km² overlap
Chemainus Estuary - Catalyst
IUCN IVPrivately Owned Conservation Area
1.90 km² overlap
Privately Protected Area
1.61 km² overlap
DIONISIO POINT PARK
IUCN IIA - Park
1.41 km² overlap
Bluffs Park
IUCN IVPrivately Owned Conservation Area
1.39 km² overlap
WAKES COVE PARK
IUCN IIA - Park
1.32 km² overlap
Ecological Reserve
1.29 km² overlap
Privately Owned Conservation Area
1.28 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
1.23 km² overlap
CHEMAINUS RIVER PARK
IUCN IIA - Park
1.18 km² overlap
HEMER PARK
IUCN IIA - Park
1.11 km² overlap
St Mary Lake
IUCN IVPrivately Owned Conservation Area
1.11 km² overlap
MOUNT ERSKINE PARK
IUCN IIA - Park
1.08 km² overlap
Mount Parke Regional Park
IUCN IVRegional Park
0.91 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.90 km² overlap
WALLACE ISLAND MARINE PARK
IUCN Not ReportedA - Park
0.85 km² overlap
Mount Galiano Park
IUCN IVPrivately Owned Conservation Area
0.81 km² overlap
Privately Owned Conservation Area
0.78 km² overlap
Privately Owned Conservation Area
0.76 km² overlap
MONTAGUE HARBOUR MARINE PARK
IUCN IIA - Park
0.70 km² overlap
Ecological Reserve
0.67 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 351 distinct species · 342 474 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Chemainus River : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 4 types (connectance 10.8%, filtre Serrano α=0.2). 12 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°
8,6°C
Annual rain
1 270mm
Moisture idx (CMI)
0,38
Runoff
1 142mm/an
PET
744mm
AET
532mm
Mean slope
9,2°
Water table
433cm
Forest
91%
Crops
3%
Urban
1%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)