HydroBASINS lev08 watershed · #4080040630
Bassin de 甲突川
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 : Aira, Amakusa, Hioki, Ibusuki, Kagoshima +7
Sub-basin area
1 934,4km²
Upstream area
1 934,4km²
Discharge
4,59m³/s
Mean elev.
137m
Administrative coverage
12 dept-equivalent regions (GADM L2)
- 695.1 km²36.0% of basin
- 371.9 km²19.2% of basin
- 141.5 km²7.3% of basin
- MinamikyūshūKagoshima · Japan114.9 km²5.9% of basin
- 104.3 km²5.4% of basin
- Kami-AmakusaKumamoto · Japan87.8 km²4.5% of basin
- 85.0 km²4.4% of basin
- 69.6 km²3.6% of basin
4 moreFull L2 list
- Kirishima49.3 km² · 2.5%
- Kajiki38.5 km² · 2.0%
- Satsumasendai18.7 km² · 1.0%
- Hioki5.2 km² · 0.3%
30 intersecting protected areas
Unzen amakusa
IUCN VNational Park
238.42 km² overlap
Common fishery right area
122.95 km² overlap
Kirishima kinkowan
IUCN IINational Park
76.47 km² overlap
Itsuwa
IUCN IVPrefectural Wildlife Protection Area
37.39 km² overlap
Common fishery right area
29.90 km² overlap
Oidake
IUCN IVPrefectural Wildlife Protection Area
28.98 km² overlap
Goshoura
IUCN IVPrefectural Wildlife Protection Area
20.21 km² overlap
Ikedako unagiike
IUCN IVPrefectural Wildlife Protection Area
17.48 km² overlap
Fukuregi
IUCN IVPrefectural Wildlife Protection Area
14.69 km² overlap
21 more protected areassorted by overlap area
Ushibuka
IUCN IVPrefectural Wildlife Protection Area
14.49 km² overlap
Kyunan
IUCN IVPrefectural Wildlife Protection Area
13.97 km² overlap
Hirakawa
IUCN IVPrefectural Wildlife Protection Area
12.53 km² overlap
Jumanyama
IUCN IVPrefectural Wildlife Protection Area
12.42 km² overlap
Kagoshimaken kenminno mori
IUCN IVPrefectural Wildlife Protection Area
9.29 km² overlap
Amakusa seibu
IUCN IVPrefectural Wildlife Protection Area
9.27 km² overlap
Sengan zan-matsushima
IUCN IVPrefectural Wildlife Protection Area
7.23 km² overlap
Imuta ike
IUCN VPrefectural Natural Park
5.81 km² overlap
Satsunan Kaigan
IUCN VPrefectural Natural Park
5.04 km² overlap
Iso
IUCN IVPrefectural Wildlife Protection Area
4.36 km² overlap
Nagasakibana
IUCN IVPrefectural Wildlife Protection Area
3.03 km² overlap
Tomioka
IUCN IVPrefectural Wildlife Protection Area
2.78 km² overlap
Uwatoko
IUCN IVPrefectural Wildlife Protection Area
1.14 km² overlap
Yokomine
IUCN IVPrefectural Wildlife Protection Area
1.05 km² overlap
Hondoeikanko
IUCN IVPrefectural Wildlife Protection Area
0.95 km² overlap
Chiringashima
IUCN IVPrefectural Wildlife Protection Area
0.55 km² overlap
Mizobe shochugakko
IUCN IVPrefectural Wildlife Protection Area
0.51 km² overlap
Oshima
IUCN IVPrefectural Wildlife Protection Area
0.46 km² overlap
Hachiman koen
IUCN IVPrefectural Wildlife Protection Area
0.40 km² overlap
Sumiyoshi
IUCN IVPrefectural Wildlife Protection Area
0.38 km² overlap
Shiroyama
IUCN IVPrefectural Wildlife Protection Area
0.32 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
880 distinct species · 4 509 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 甲突川 : 23 espèces reliées par 20 interactions GloBI sur 2 types (connectance 6.2%, filtre Serrano α=0.2). 3 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°
16,7°C
Annual rain
2 295mm
Moisture idx (CMI)
0,53
Runoff
1 440mm/an
PET
1 070mm
AET
1 070mm
Mean slope
9,0°
Water table
271cm
Forest
68%
Crops
8%
Urban
19%
Protected
25%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)