HydroBASINS lev08 watershed · #4080038730
Bassin de 静内川
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 : Niikappu, Shinhidaka, Taiki
Sub-basin area
665,3km²
Upstream area
665,3km²
Discharge
17,6m³/s
Mean elev.
641m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 650.8 km²97.7% of basin
- 15.6 km²2.3% of basin
- 0.0 km²0.0% of basin
8 intersecting protected areas
Hidakasanmyaku-Erimo-Tokachi
IUCN IINational Park
379.87 km² overlap
Hidaka Sammyaku
IUCN IbForest Ecosystem Reserve
291.23 km² overlap
Kyuniikappu shuchikubokujo
IUCN IVPrefectural Wildlife Protection Area
17.10 km² overlap
Shizunaigawa
IUCN IVPrefectural Wildlife Protection Area
1.88 km² overlap
Rare Population Protected Forest
0.24 km² overlap
Hidaka tobu
IUCN VICoastline Marine Resource Development Area, designated sea area
0.00 km² overlap
Shizunai jinja
IUCN VEnvironmental Green Space Protection Area(Hokkaido)
0.00 km² overlap
Common fishery right area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
345 distinct species · 833 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 静内川 : 29 espèces reliées par 45 interactions GloBI sur 5 types (connectance 6.4%, 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°
4,3°C
Annual rain
1 446mm
Moisture idx (CMI)
0,54
Runoff
859mm/an
PET
659mm
AET
658mm
Mean slope
22,1°
Water table
666cm
Forest
14%
Crops
27%
Urban
0%
Protected
22%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)