HydroBASINS lev08 watershed · #4080447490
Bassin de 長木川
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 : Hirakawa, Kosaka, Ōdate, Ōwani
Sub-basin area
250,5km²
Upstream area
250,5km²
Discharge
7,71m³/s
Mean elev.
255m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
4 dept-equivalent regions (GADM L2)
- 245.4 km²97.9% of basin
- 2.2 km²0.9% of basin
- 1.9 km²0.8% of basin
- 1.3 km²0.5% of basin
7 intersecting protected areas
Shirakami Hakkoda
IUCN VGreen Corridor
19.24 km² overlap
Odate naganeyama
IUCN IVPrefectural Wildlife Protection Area
4.97 km² overlap
Shoshigenai
IUCN IVPrefectural Wildlife Protection Area
4.18 km² overlap
Hakamakoshiyama
IUCN IVPrefectural Wildlife Protection Area
2.97 km² overlap
Prefectural Natural Park
0.41 km² overlap
Rare Population Protected Forest
0.09 km² overlap
Kangamori
IUCN IVPrefectural Wildlife Protection Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
929 distinct species · 4 005 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 33 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 長木川 : 29 espèces reliées par 46 interactions GloBI sur 3 types (connectance 7.7%, 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 463mm
Moisture idx (CMI)
0,43
Runoff
973mm/an
PET
832mm
AET
785mm
Mean slope
11,7°
Water table
371cm
Forest
92%
Crops
2%
Urban
10%
Protected
5%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)