HydroBASINS lev08 watershed · #4080043000
Bassin de 舟川
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 4 administrative regions : Asahi, Itoigawa, Kurobe, Nyūzen
Sub-basin area
351,2km²
Upstream area
351,2km²
Discharge
7,2m³/s
Mean elev.
406m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- AsahiToyama · Japan145.4 km²41.4% of basin
- 127.4 km²36.3% of basin
- 61.9 km²17.6% of basin
- 4.8 km²1.4% of basin
15 intersecting protected areas
Asahi
IUCN VPrefectural Natural Park
61.20 km² overlap
Daira
IUCN IVPrefectural Wildlife Protection Area
22.47 km² overlap
Common fishery right area
7.03 km² overlap
Oyashirazu koshirazu
IUCN VPrefectural Natural Park
7.00 km² overlap
Common fishery right area
5.44 km² overlap
Shiroyama
IUCN IVPrefectural Wildlife Protection Area
2.64 km² overlap
Maikomidaira
IUCN VPrefectural Nature Conservation Area
0.81 km² overlap
Aimoto
IUCN IVPrefectural Wildlife Protection Area
0.27 km² overlap
Kurobegawa kako
IUCN IVPrefectural Wildlife Protection Area
0.16 km² overlap
6 more protected areassorted by overlap area
Hakuba sanroku
IUCN VPrefectural Natural Park
0.08 km² overlap
Kanayamadani
IUCN VPrefectural Nature Conservation Area
0.04 km² overlap
Sugisawa no sawasugi
IUCN IIINational Natural Monument
0.04 km² overlap
Inugadake Honshakunage
IUCN IVRare Population Protected Forest
0.03 km² overlap
Sawasugi
IUCN VPrefectural Nature Conservation Area
0.03 km² overlap
Akiha jinja
IUCN VGreen Space Environment Conservation Area(Niigata)
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 523 distinct species · 6 318 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 23 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 舟川 : 14 espèces reliées par 35 interactions GloBI sur 6 types (connectance 9.3%, filtre Serrano α=0.2). 14 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°
11,5°C
Annual rain
1 941mm
Moisture idx (CMI)
0,51
Runoff
1 557mm/an
PET
941mm
AET
928mm
Mean slope
16,0°
Water table
502cm
Forest
53%
Crops
23%
Urban
12%
Protected
26%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)