HydroBASINS lev08 watershed · #4080468660
Bassin de 三内川
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 : Akita, Daisen, Kamikoani, Kitaakita
Sub-basin area
311,1km²
Upstream area
311,4km²
Discharge
12,26m³/s
Mean elev.
328m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 307.7 km²98.8% of basin
- 1.5 km²0.5% of basin
- 1.1 km²0.4% of basin
- 1.1 km²0.4% of basin
11 intersecting protected areas
Taiheizan Shuhen
IUCN IVBiocenosis Protected Forest
28.29 km² overlap
Taihe zan
IUCN VPrefectural Natural Park
24.90 km² overlap
Tsukushi mori
IUCN IVPrefectural Wildlife Protection Area
9.48 km² overlap
Hachimantai Taiheizan
IUCN VGreen Corridor
9.34 km² overlap
Bandorimori・Daibutsudake
IUCN IVBiocenosis Protected Forest
2.64 km² overlap
Bandori mori
IUCN VPrefectural Nature Conservation Area
1.30 km² overlap
Bandori mori
IUCN IVPrefectural Wildlife Protection Area
1.26 km² overlap
Tsubakidai
IUCN IVPrefectural Wildlife Protection Area
0.61 km² overlap
Komatasawa Sugi
IUCN IVRare Population Protected Forest
0.42 km² overlap
2 more protected areassorted by overlap area
Nibetsu
IUCN IVPrefectural Wildlife Protection Area
0.09 km² overlap
Frespo Goshono Hachiro Tope
IUCN Not ApplicableOECM
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 478 distinct species · 4 660 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 三内川 : 32 espèces reliées par 46 interactions GloBI sur 5 types (connectance 6.5%, 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°
9,3°C
Annual rain
1 695mm
Moisture idx (CMI)
0,51
Runoff
1 219mm/an
PET
829mm
AET
816mm
Mean slope
12,8°
Water table
385cm
Forest
88%
Crops
2%
Urban
5%
Protected
10%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)