HydroBASINS lev08 watershed · #4080498270
Bassin de 最上川
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 12 administrative regions : Funagata, Higashine, Kahoku, Kami Town, Mogami +7
Sub-basin area
1 057,8km²
Upstream area
4 389,3km²
Discharge
129,37m³/s
Mean elev.
343m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 寒河江川487 km²
- Bassin de 最上川23 km²
12 dept-equivalent regions (GADM L2)
- 363.3 km²34.3% of basin
- 206.9 km²19.5% of basin
- 195.8 km²18.5% of basin
- 82.7 km²7.8% of basin
- 79.1 km²7.5% of basin
- 60.1 km²5.7% of basin
- 43.7 km²4.1% of basin
- 12.2 km²1.2% of basin
18 intersecting protected areas
Gosho zan
IUCN VPrefectural Natural Park
117.79 km² overlap
Ouu Mountain Range
IUCN VGreen Corridor
35.71 km² overlap
Tendo kogen
IUCN VPrefectural Natural Park
17.95 km² overlap
Funagatayama(Goshozan)
IUCN IVBiocenosis Protected Forest
15.33 km² overlap
Goshozan
IUCN IVPrefectural Wildlife Protection Area
12.51 km² overlap
Osaki seibu
IUCN IVPrefectural Wildlife Protection Area
4.67 km² overlap
Higashizawa koen
IUCN IVPrefectural Wildlife Protection Area
4.65 km² overlap
Funagata renpo
IUCN VPrefectural Natural Park
4.40 km² overlap
Goten
IUCN IVPrefectural Wildlife Protection Area
3.89 km² overlap
9 more protected areassorted by overlap area
Dewamitsumori
IUCN IVPrefectural Wildlife Protection Area
1.18 km² overlap
Zao renpo
IUCN IVPrefectural Wildlife Protection Area
1.12 km² overlap
Futakuchi kyokoku
IUCN VPrefectural Natural Park
1.12 km² overlap
Funagata
IUCN IVPrefectural Wildlife Protection Area
1.03 km² overlap
Hayama
IUCN IVPrefectural Wildlife Protection Area
0.93 km² overlap
Kawashimayama
IUCN VSatoyama Environment Conservation Area(Yamagata)
0.77 km² overlap
Tokurako
IUCN IVPrefectural Wildlife Protection Area
0.42 km² overlap
Tamugino
IUCN IVPrefectural Wildlife Protection Area
0.35 km² overlap
Zao
IUCN VQuasi National Park
0.12 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 139 distinct species · 8 949 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 最上川 : 24 espèces reliées par 35 interactions GloBI sur 5 types (connectance 6.6%, filtre Serrano α=0.2). 9 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°
10,0°C
Annual rain
1 580mm
Moisture idx (CMI)
0,43
Runoff
1 051mm/an
PET
892mm
AET
846mm
Mean slope
10,8°
Water table
328cm
Forest
69%
Crops
4%
Urban
11%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)