HydroBASINS lev08 watershed · #4080043170
Bassin de 信濃川
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 : Izumozaki, Kariwa, Kashiwazaki, Nagaoka, Tsubame +1
Sub-basin area
354,5km²
Upstream area
10 578,5km²
Discharge
485,87m³/s
Mean elev.
71m
Administrative coverage
Hydrographic chain
▼ Drains into
Outlet (drains to ocean / endorheic)
▲ Receives from 2 basins
- Bassin de 渋海川351 km²
- Bassin de 信濃川152 km²
6 dept-equivalent regions (GADM L2)
- 303.7 km²85.6% of basin
- 22.4 km²6.3% of basin
- KashiwazakiNiigata · Japan16.1 km²4.5% of basin
- 7.0 km²2.0% of basin
- 3.5 km²1.0% of basin
- 2.0 km²0.6% of basin
9 intersecting protected areas
Sado-Yahiko-Yoneyama
IUCN VQuasi National Park
14.26 km² overlap
Prefectural Natural Park
12.42 km² overlap
Yahiko
IUCN IVPrefectural Wildlife Protection Area
1.56 km² overlap
Watabe
IUCN IVPrefectural Wildlife Protection Area
1.44 km² overlap
Kugamiyama
IUCN IVPrefectural Wildlife Protection Area
0.97 km² overlap
Yukyuzan
IUCN IVPrefectural Wildlife Protection Area
0.85 km² overlap
YUKIGUNI BOTANICAL GARDENS
IUCN Not ApplicableOECM
0.36 km² overlap
Happodai ikoino mori
IUCN IVPrefectural Wildlife Protection Area
0.08 km² overlap
Joushouin
IUCN VGreen Space Environment Conservation Area(Niigata)
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
753 distinct species · 2 094 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 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 信濃川 : 31 espèces reliées par 50 interactions GloBI sur 2 types (connectance 7.5%, filtre Serrano α=0.2). 6 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°
12,5°C
Annual rain
2 241mm
Moisture idx (CMI)
0,59
Runoff
1 695mm/an
PET
928mm
AET
906mm
Mean slope
4,6°
Water table
132cm
Forest
38%
Crops
21%
Urban
33%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)