HydroBASINS lev08 watershed · #4080616250
Bassin de 江の川
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 7 administrative regions : Gōtsu, Iinan, Kawamoto, Misato, Miyoshi +2
Sub-basin area
666,6km²
Upstream area
3 475,2km²
Discharge
98,72m³/s
Mean elev.
306m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 江の川337 km²
- Bassin de 出羽川143 km²
7 dept-equivalent regions (GADM L2)
- 279.6 km²41.9% of basin
- 142.9 km²21.4% of basin
- 104.6 km²15.7% of basin
- 68.3 km²10.3% of basin
- 40.4 km²6.1% of basin
- 21.8 km²3.3% of basin
- MiyoshiHiroshima · Japan8.8 km²1.3% of basin
14 intersecting protected areas
Go gawa suikei
IUCN VPrefectural Natural Park
19.50 km² overlap
Daisen oki
IUCN VNational Park
11.84 km² overlap
Sanbesan
IUCN IVPrefectural Wildlife Protection Area
10.94 km² overlap
Yugakai
IUCN IVPrefectural Wildlife Protection Area
7.06 km² overlap
Dangyokei-kannon daki
IUCN VPrefectural Natural Park
5.27 km² overlap
Maruyamajo shinrinyoku koen
IUCN IVPrefectural Wildlife Protection Area
1.93 km² overlap
Ikoinomura shimane
IUCN IVPrefectural Wildlife Protection Area
1.89 km² overlap
Futatsuyama
IUCN IVPrefectural Wildlife Protection Area
1.81 km² overlap
Hamahara dam
IUCN IVPrefectural Wildlife Protection Area
1.46 km² overlap
5 more protected areassorted by overlap area
Kannon daki
IUCN IVPrefectural Wildlife Protection Area
1.18 km² overlap
Sambesam Buna・Mizunara
IUCN IVRare Population Protected Forest
0.60 km² overlap
Prefectural Nature Conservation Area
0.28 km² overlap
Dangyokei
IUCN IVPrefectural Wildlife Protection Area
0.16 km² overlap
Hananotani Shakunage
IUCN IVRare Population Protected Forest
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
392 distinct species · 1 241 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 19 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 江の川 : 17 espèces reliées par 17 interactions GloBI sur 4 types (connectance 8.9%, filtre Serrano α=0.2). 3 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°
12,7°C
Annual rain
1 817mm
Moisture idx (CMI)
0,48
Runoff
967mm/an
PET
941mm
AET
937mm
Mean slope
13,8°
Water table
447cm
Forest
97%
Crops
2%
Urban
0%
Protected
8%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)