HydroBASINS lev08 watershed · #7080016270
Bassin de Seymour 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 : Fraser Valley, Greater Vancouver, Squamish-Lillooet
Sub-basin area
1 543,7km²
Upstream area
1 543,7km²
Discharge
3,16m³/s
Mean elev.
560m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 1079.5 km²69.7% of basin
- 402.7 km²26.0% of basin
- 3.0 km²0.2% of basin
30 intersecting protected areas
A - Park
64.96 km² overlap
PINECONE BURKE PARK
IUCN IIA - Park
38.38 km² overlap
MOUNT SEYMOUR PARK
IUCN IIA - Park
35.68 km² overlap
Old Growth Management Areas (Mapped Legal)
IUCN Not ApplicableOld Growth Management Areas (Mapped Legal)
28.94 km² overlap
CYPRESS PARK
IUCN IIA - Park
28.71 km² overlap
Sea To Sky Wildland Areas
IUCN Not ApplicableSea To Sky Wildland Areas
20.53 km² overlap
Belcarra Regional Park
IUCN IVProtected Area
10.30 km² overlap
Protected Area
8.95 km² overlap
Pacific Spirit Regional Park
IUCN IVProtected Area
6.48 km² overlap
21 more protected areassorted by overlap area
STAWAMUS CHIEF PARK
IUCN IIIA - Park
5.29 km² overlap
Fraser River Delta
IUCN Not ReportedWetland of International Importance (Ramsar Site)
4.90 km² overlap
Wildlife Management Area
4.52 km² overlap
Stanley Park
IUCN Not ReportedNational Historic site
3.02 km² overlap
Sea Island Conservation Area
IUCN Not ApplicableConservation Area
1.41 km² overlap
Wildlife Management Area
1.31 km² overlap
Capilano River Regional Park
IUCN IVProtected Area
1.00 km² overlap
SHANNON FALLS PARK
IUCN IIIA - Park
0.91 km² overlap
Grauer
IUCN IVPrivately Owned Conservation Area
0.50 km² overlap
DUC Fee Simple Lands
IUCN IVOwnership by Environmental Non-Governmental Organization
0.50 km² overlap
Protected Area
0.48 km² overlap
MURRIN PARK
IUCN Not ReportedA - Park
0.32 km² overlap
PORTEAU COVE PARK
IUCN Not ReportedA - Park
0.31 km² overlap
Maplewood Conservation Area
IUCN Not ApplicableNature Reserve
0.23 km² overlap
Everett Crowley Park
IUCN Not ApplicablePark
0.21 km² overlap
Privately Protected Area
0.17 km² overlap
Swishswash Island
IUCN IVPrivately Owned Conservation Area
0.17 km² overlap
Wildlife Management Area
0.15 km² overlap
Open Space of Lions Bay
IUCN Not ApplicableOECM
0.15 km² overlap
Strait of Georgia and Howe Sound Glass Sponge Reef Closure (Queen Charlotte Channel)
IUCN Not ApplicableOther Effective Area-Based Conservation Measure
0.12 km² overlap
Protected Area
0.11 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
10 162 distinct species · 3 380 702 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 Seymour River : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 75 interactions GloBI sur 4 types (connectance 10.1%, 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°
7,2°C
Annual rain
1 358mm
Moisture idx (CMI)
0,48
Runoff
1 624mm/an
PET
700mm
AET
547mm
Mean slope
18,1°
Water table
566cm
Forest
68%
Crops
1%
Urban
23%
Protected
12%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)