HydroBASINS lev08 watershed · #4080043020
Bassin de 姫川
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 8 administrative regions : Asahi, Hakuba, Itoigawa, Kurobe, Myōkō +3
Sub-basin area
734,7km²
Upstream area
734,7km²
Discharge
31,64m³/s
Mean elev.
1 062m
Administrative coverage
8 dept-equivalent regions (GADM L2)
- 285.8 km²38.9% of basin
- 259.3 km²35.3% of basin
- 178.4 km²24.3% of basin
- 6.0 km²0.8% of basin
- AsahiToyama · Japan2.4 km²0.3% of basin
- 1.3 km²0.2% of basin
- 1.0 km²0.1% of basin
- 0.7 km²0.1% of basin
26 intersecting protected areas
Chubusangaku
IUCN IINational Park
170.43 km² overlap
Hakubarenge
IUCN IVPrefectural Wildlife Protection Area
80.67 km² overlap
Myokotogakushirenzan
IUCN IINational Park
40.33 km² overlap
Hakuba sanroku
IUCN VPrefectural Natural Park
36.55 km² overlap
Kazabukidake
IUCN IVPrefectural Wildlife Protection Area
35.73 km² overlap
Kita alps hokubu
IUCN IVPrefectural Wildlife Protection Area
23.38 km² overlap
Amakazari and Togakushi
IUCN VGreen Corridor
19.98 km² overlap
Amakazari・Tenguharayama
IUCN IVBiocenosis Protected Forest
15.52 km² overlap
Biocenosis Protected Forest
13.34 km² overlap
17 more protected areassorted by overlap area
Hakuba mura
IUCN IVPrefectural Wildlife Protection Area
13.15 km² overlap
Renge Xxx
IUCN IVRare Population Protected Forest
8.97 km² overlap
Kotaki
IUCN IVPrefectural Wildlife Protection Area
5.13 km² overlap
Kita alps
IUCN IVNational Wildlife Protection Area
2.09 km² overlap
Myokosan
IUCN IVPrefectural Wildlife Protection Area
1.04 km² overlap
Inugadake Honshakunage
IUCN IVRare Population Protected Forest
1.00 km² overlap
Okususobanakyo
IUCN IVPrefectural Wildlife Protection Area
0.66 km² overlap
Hiuchiyama
IUCN IVPrefectural Wildlife Protection Area
0.46 km² overlap
Okususobana
IUCN IVPrefectural Wildlife Protection Area
0.38 km² overlap
Himekawa genryu
IUCN IVPrefectural Wildlife Protection Area
0.26 km² overlap
Biocenosis Protected Forest
0.17 km² overlap
Himekawa genryu
IUCN VPrefectural Nature Conservation Area
0.13 km² overlap
Kazafuki Sugi Idenshigen
IUCN IVRare Population Protected Forest
0.12 km² overlap
Kakuma ike
IUCN VPrefectural Nature Conservation Area
0.10 km² overlap
Asahi
IUCN VPrefectural Natural Park
0.08 km² overlap
Common fishery right area
0.01 km² overlap
Maikomidaira
IUCN VPrefectural Nature Conservation Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 380 distinct species · 17 937 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 姫川 : 21 espèces reliées par 35 interactions GloBI sur 5 types (connectance 8.0%, 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°
7,8°C
Annual rain
1 673mm
Moisture idx (CMI)
0,48
Runoff
1 478mm/an
PET
850mm
AET
837mm
Mean slope
20,1°
Water table
625cm
Forest
63%
Crops
24%
Urban
3%
Protected
39%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)