HydroBASINS lev08 watershed · #4080045700
Bassin de 一ノ河川
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 : Fukuoka, Gotō, Iki, Munakata, Ojika +3
Sub-basin area
1 977,7km²
Upstream area
1 977,7km²
Discharge
0,46m³/s
Mean elev.
79m
Administrative coverage
8 dept-equivalent regions (GADM L2)
- 733.0 km²37.1% of basin
- 433.5 km²21.9% of basin
- 239.7 km²12.1% of basin
- 143.5 km²7.3% of basin
- 27.5 km²1.4% of basin
- 19.5 km²1.0% of basin
- 1.3 km²0.1% of basin
- 0.6 km²0.0% of basin
30 intersecting protected areas
Common fishery right area
422.61 km² overlap
Saikai
IUCN VNational Park
271.66 km² overlap
Iki-Tsushima
IUCN VQuasi National Park
257.85 km² overlap
Uku
IUCN IVPrefectural Wildlife Protection Area
26.11 km² overlap
Tamanourawan
IUCN IVPrefectural Wildlife Protection Area
19.60 km² overlap
Arikawa
IUCN IVPrefectural Wildlife Protection Area
18.10 km² overlap
Mitake
IUCN IVPrefectural Wildlife Protection Area
17.34 km² overlap
Ina
IUCN IVNational Wildlife Protection Area
11.53 km² overlap
Sakito seibu shoto
IUCN IVPrefectural Wildlife Protection Area
8.30 km² overlap
21 more protected areassorted by overlap area
Nozakijima
IUCN IVPrefectural Wildlife Protection Area
7.11 km² overlap
Sannozan
IUCN IVPrefectural Wildlife Protection Area
6.42 km² overlap
Nanatake
IUCN IVPrefectural Wildlife Protection Area
6.10 km² overlap
Kisaka
IUCN IVPrefectural Wildlife Protection Area
5.56 km² overlap
Shushigawa
IUCN IVPrefectural Wildlife Protection Area
5.31 km² overlap
Shimayamajima
IUCN IVPrefectural Wildlife Protection Area
4.84 km² overlap
Takakobuyama
IUCN IVPrefectural Wildlife Protection Area
4.75 km² overlap
Danjogunto
IUCN IVNational Wildlife Protection Area
4.55 km² overlap
Danjo Gunto
IUCN IVBiocenosis Protected Forest
4.51 km² overlap
Uchiyami dam
IUCN IVPrefectural Wildlife Protection Area
4.49 km² overlap
Rare Population Protected Forest
4.25 km² overlap
Kawahara dam
IUCN IVPrefectural Wildlife Protection Area
3.99 km² overlap
Shiratake
IUCN IVPrefectural Wildlife Protection Area
3.83 km² overlap
Taterasan
IUCN IVPrefectural Wildlife Protection Area
3.60 km² overlap
Shushinouchi
IUCN IVNational Wildlife Protection Area
3.31 km² overlap
Toraboshiyama
IUCN IVPrefectural Wildlife Protection Area
3.14 km² overlap
Common fishery right area
3.04 km² overlap
Kamidake
IUCN IVPrefectural Wildlife Protection Area
2.71 km² overlap
Sago
IUCN IVPrefectural Wildlife Protection Area
2.08 km² overlap
Takenokojima shoto
IUCN IVPrefectural Wildlife Protection Area
1.55 km² overlap
Mitake Xxx
IUCN IVRare Population Protected Forest
1.50 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 351 distinct species · 7 132 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 一ノ河川 : 23 espèces reliées par 41 interactions GloBI sur 5 types (connectance 8.3%, 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°
15,4°C
Annual rain
2 064mm
Moisture idx (CMI)
0,54
Runoff
1 032mm/an
PET
937mm
AET
937mm
Mean slope
9,5°
Water table
323cm
Forest
57%
Crops
13%
Urban
2%
Protected
33%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)