HydroBASINS lev08 watershed · #4080470600
Bassin de 檜木内川
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, Kitaakita, Semboku
Sub-basin area
321,4km²
Upstream area
321,5km²
Discharge
11,36m³/s
Mean elev.
373m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 310.6 km²96.5% of basin
- 4.1 km²1.3% of basin
- 4.0 km²1.2% of basin
- 2.9 km²0.9% of basin
11 intersecting protected areas
Hachimantai Taiheizan
IUCN VGreen Corridor
14.78 km² overlap
Bandorimori・Daibutsudake
IUCN IVBiocenosis Protected Forest
8.58 km² overlap
Horiuchi
IUCN IVPrefectural Wildlife Protection Area
6.53 km² overlap
Budomori
IUCN IVBiocenosis Protected Forest
5.52 km² overlap
Sotonoyama-daiitokusan
IUCN IVPrefectural Wildlife Protection Area
3.82 km² overlap
Tazawako dakigaeri
IUCN VPrefectural Natural Park
2.12 km² overlap
Tazawako
IUCN IVPrefectural Wildlife Protection Area
0.60 km² overlap
Moriyoshi zan
IUCN VPrefectural Natural Park
0.28 km² overlap
Yukitsubaki
IUCN IVRare Population Protected Forest
0.05 km² overlap
2 more protected areassorted by overlap area
Bandori mori
IUCN VPrefectural Nature Conservation Area
0.00 km² overlap
Bandori mori
IUCN IVPrefectural Wildlife Protection Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
619 distinct species · 1 888 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 檜木内川 : 25 espèces reliées par 34 interactions GloBI sur 3 types (connectance 7.3%, 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°
9,0°C
Annual rain
1 628mm
Moisture idx (CMI)
0,48
Runoff
1 114mm/an
PET
837mm
AET
818mm
Mean slope
13,4°
Water table
401cm
Forest
90%
Crops
2%
Urban
1%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)