HydroBASINS lev08 watershed · #4080350130
Bassin de 札内川
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 9 administrative regions : Biratori, Hidaka, Makubetsu, Memuro, Nakasatsunai +4
Sub-basin area
613,3km²
Upstream area
613,3km²
Discharge
14,71m³/s
Mean elev.
627m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
9 dept-equivalent regions (GADM L2)
- 358.4 km²58.3% of basin
- 223.2 km²36.3% of basin
- 12.5 km²2.0% of basin
- 11.4 km²1.9% of basin
- 3.2 km²0.5% of basin
- 1.9 km²0.3% of basin
- 1.8 km²0.3% of basin
- 1.3 km²0.2% of basin
1 moreFull L2 list
- Taiki0.8 km² · 0.1%
4 intersecting protected areas
Hidakasanmyaku-Erimo-Tokachi
IUCN IINational Park
246.69 km² overlap
Hidaka Sammyaku
IUCN IbForest Ecosystem Reserve
234.02 km² overlap
Iwanai
IUCN IVPrefectural Wildlife Protection Area
6.79 km² overlap
Iwanai senkyou
IUCN VNatural Landscape Protection Area(Hokkaido)
0.20 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
928 distinct species · 4 178 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 札内川 : 22 espèces reliées par 86 interactions GloBI sur 6 types (connectance 11.0%, filtre Serrano α=0.2). 18 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°
4,0°C
Annual rain
1 511mm
Moisture idx (CMI)
0,54
Runoff
808mm/an
PET
678mm
AET
674mm
Mean slope
16,5°
Water table
490cm
Forest
29%
Crops
30%
Urban
2%
Protected
31%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)