HydroBASINS lev08 watershed · #4080043320
Bassin de 三面川
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 5 administrative regions : Murakami, Nishikawa, Oguni, Sekikawa, Tsuruoka
Sub-basin area
699,9km²
Upstream area
699,9km²
Discharge
24,7m³/s
Mean elev.
441m
Administrative coverage
5 dept-equivalent regions (GADM L2)
- 692.7 km²98.9% of basin
- 6.7 km²1.0% of basin
- 0.7 km²0.1% of basin
- 0.0 km²0.0% of basin
- 0.0 km²0.0% of basin
10 intersecting protected areas
Bandai asahi
IUCN IINational Park
225.03 km² overlap
Asahi Sanchi
IUCN IbForest Ecosystem Reserve
218.94 km² overlap
Otori asahi
IUCN IVNational Wildlife Protection Area
97.51 km² overlap
Green Corridor
25.37 km² overlap
Miomote
IUCN IVPrefectural Wildlife Protection Area
21.83 km² overlap
Senami
IUCN IVPrefectural Wildlife Protection Area
1.42 km² overlap
Narumi san
IUCN VPrefectural Nature Conservation Area
1.04 km² overlap
Suzuga taki
IUCN VPrefectural Nature Conservation Area
0.78 km² overlap
Prefectural Natural Park
0.24 km² overlap
1 more protected areassorted by overlap area
Common fishery right area
0.16 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
436 distinct species · 1 039 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 16 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 三面川 : 14 espèces reliées par 13 interactions GloBI sur 6 types (connectance 10.8%, filtre Serrano α=0.2). 2 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 967mm
Moisture idx (CMI)
0,56
Runoff
1 074mm/an
PET
870mm
AET
857mm
Mean slope
17,9°
Water table
571cm
Forest
87%
Crops
3%
Urban
2%
Protected
36%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)