HydroBASINS lev08 watershed · #4080038810
Bassin de 沙流川
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 6 administrative regions : Biratori, Hidaka, Memuro, Mukawa, Niikappu +1
Sub-basin area
1 340,1km²
Upstream area
1 340,1km²
Discharge
37,91m³/s
Mean elev.
581m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- 740.1 km²55.1% of basin
- 545.6 km²40.6% of basin
- 27.1 km²2.0% of basin
- 23.1 km²1.7% of basin
- 5.8 km²0.4% of basin
- 0.4 km²0.0% of basin
11 intersecting protected areas
Hidakasanmyaku-Erimo-Tokachi
IUCN IINational Park
598.80 km² overlap
Hidaka Sammyaku
IUCN IbForest Ecosystem Reserve
313.40 km² overlap
Nissho
IUCN IVPrefectural Wildlife Protection Area
7.96 km² overlap
Horokaushappu
IUCN IVPrefectural Wildlife Protection Area
5.55 km² overlap
Hobetsu
IUCN IVPrefectural Wildlife Protection Area
0.57 km² overlap
Hiratori
IUCN IVPrefectural Wildlife Protection Area
0.53 km² overlap
Rare Population Protected Forest
0.08 km² overlap
Hidaka Ezomatsu
IUCN IVRare Population Protected Forest
0.01 km² overlap
Common fishery right area
0.01 km² overlap
2 more protected areassorted by overlap area
Taisetsu and Hidaka
IUCN VGreen Corridor
0.00 km² overlap
Hidaka seibu
IUCN VICoastline Marine Resource Development Area, designated sea area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
679 distinct species · 2 007 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 沙流川 : 29 espèces reliées par 53 interactions GloBI sur 5 types (connectance 7.2%, 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°
4,7°C
Annual rain
1 392mm
Moisture idx (CMI)
0,49
Runoff
907mm/an
PET
690mm
AET
680mm
Mean slope
15,9°
Water table
471cm
Forest
60%
Crops
16%
Urban
0%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)