HydroBASINS lev08 watershed · #4080043260
Bassin de 加治川
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 : Aga, Agano, Oguni, Seirō, Shibata +1
Sub-basin area
499,8km²
Upstream area
499,9km²
Discharge
17,3m³/s
Mean elev.
384m
Administrative coverage
6 dept-equivalent regions (GADM L2)
- ShibataNiigata · Japan432.1 km²86.4% of basin
- 39.8 km²8.0% of basin
- 18.3 km²3.7% of basin
- 8.2 km²1.6% of basin
- 0.9 km²0.2% of basin
- 0.4 km²0.1% of basin
18 intersecting protected areas
Tainai ninoji
IUCN VPrefectural Natural Park
74.67 km² overlap
Bandai asahi
IUCN IINational Park
61.39 km² overlap
Iidesan Shuhen
IUCN IbForest Ecosystem Reserve
51.67 km² overlap
Kitamatadake
IUCN IVPrefectural Wildlife Protection Area
32.22 km² overlap
Manaitakura yama
IUCN VPrefectural Nature Conservation Area
1.17 km² overlap
Manaitakurayama Sugi
IUCN IVRare Population Protected Forest
1.13 km² overlap
Ijimino koen
IUCN IVPrefectural Wildlife Protection Area
0.94 km² overlap
Haramaki
IUCN IVPrefectural Wildlife Protection Area
0.39 km² overlap
Iidesan
IUCN IVPrefectural Wildlife Protection Area
0.28 km² overlap
9 more protected areassorted by overlap area
Gozu renpo
IUCN VPrefectural Natural Park
0.18 km² overlap
Fujitsukahama
IUCN IVPrefectural Wildlife Protection Area
0.14 km² overlap
Akataniyama Sugi Idenshigen
IUCN IVRare Population Protected Forest
0.12 km² overlap
Kiyogata
IUCN IVPrefectural Wildlife Protection Area
0.11 km² overlap
Sarugajoiwa Oofujishida
IUCN IVRare Population Protected Forest
0.08 km² overlap
Common fishery right area
0.07 km² overlap
Gozurenpo
IUCN IVPrefectural Wildlife Protection Area
0.07 km² overlap
Kaiya
IUCN IVPrefectural Wildlife Protection Area
0.06 km² overlap
Sannoumori
IUCN VGreen Space Environment Conservation Area(Niigata)
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
597 distinct species · 1 487 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 加治川 : 23 espèces reliées par 29 interactions GloBI sur 4 types (connectance 6.2%, filtre Serrano α=0.2). 8 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°
10,8°C
Annual rain
1 902mm
Moisture idx (CMI)
0,53
Runoff
1 071mm/an
PET
885mm
AET
867mm
Mean slope
12,6°
Water table
355cm
Forest
47%
Crops
16%
Urban
15%
Protected
28%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)