HydroBASINS lev08 watershed · #4080498060
Bassin de 最上小国川
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 8 administrative regions : Funagata, Kami Town, Mogami, Obanazawa, Shinjo +3
Sub-basin area
398,9km²
Upstream area
399km²
Discharge
14,84m³/s
Mean elev.
450m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- 318.7 km²79.8% of basin
- 55.3 km²13.9% of basin
- 19.5 km²4.9% of basin
- 2.1 km²0.5% of basin
- 1.8 km²0.4% of basin
- 1.6 km²0.4% of basin
- 0.1 km²0.0% of basin
- 0.0 km²0.0% of basin
9 intersecting protected areas
Ouu Mountain Range
IUCN VGreen Corridor
70.94 km² overlap
Kurikoma
IUCN IIQuasi National Park
57.69 km² overlap
Gosho zan
IUCN VPrefectural Natural Park
2.82 km² overlap
Kurikoma
IUCN IVPrefectural Wildlife Protection Area
2.36 km² overlap
Tashiro
IUCN IVPrefectural Wildlife Protection Area
0.65 km² overlap
Kamuro
IUCN IVPrefectural Wildlife Protection Area
0.61 km² overlap
Osaki seibu
IUCN IVPrefectural Wildlife Protection Area
0.36 km² overlap
Yutorinumatetsugyo
IUCN IVRare Population Protected Forest
0.06 km² overlap
Yutori numa
IUCN VPrefectural Nature Conservation Area
0.04 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
380 distinct species · 896 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 29 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 最上小国川 : 23 espèces reliées par 26 interactions GloBI sur 5 types (connectance 6.4%, 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°
9,1°C
Annual rain
1 681mm
Moisture idx (CMI)
0,49
Runoff
1 169mm/an
PET
857mm
AET
836mm
Mean slope
15,0°
Water table
481cm
Forest
85%
Crops
1%
Urban
0%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)