HydroBASINS lev08 watershed · #7080056940
Bassin de Nanaimo 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 : Cowichan Valley, Nanaimo
Sub-basin area
835,4km²
Upstream area
835,4km²
Discharge
20,14m³/s
Mean elev.
574m
Administrative coverage
2 dept-equivalent regions (GADM L2)
- Nanaimo645.3 km²77.0% of basin
- 192.7 km²23.0% of basin
14 intersecting protected areas
Ecological Reserve
8.93 km² overlap
Wildlife Management Area
3.42 km² overlap
Ecological Reserve
0.91 km² overlap
Nanaimo River
IUCN IVPrivately Owned Conservation Area
0.41 km² overlap
Parnissian Woods
IUCN IVPrivately Owned Conservation Area
0.15 km² overlap
Privately Owned Conservation Area
0.14 km² overlap
Privately Owned Conservation Area
0.10 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.09 km² overlap
Ecological Reserve
0.09 km² overlap
5 more protected areassorted by overlap area
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.08 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.07 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.05 km² overlap
MORDEN COLLIERY HISTORIC PARK
IUCN Not ReportedA - Park
0.04 km² overlap
Privately Owned Conservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 414 distinct species · 79 168 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 39 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 Nanaimo River : 26 espèces reliées par 96 interactions GloBI sur 5 types (connectance 13.0%, filtre Serrano α=0.2). 13 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°
7,2°C
Annual rain
1 689mm
Moisture idx (CMI)
0,57
Runoff
1 514mm/an
PET
708mm
AET
551mm
Mean slope
14,1°
Water table
646cm
Forest
92%
Crops
3%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)