HydroBASINS lev08 watershed · #4080039510
Bassin de 佐敷川
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 : Akune, Amakusa, Ashikita, Izumi, Kuma +7
Sub-basin area
1 123km²
Upstream area
1 123km²
Discharge
13,25m³/s
Mean elev.
186m
Administrative coverage
12 dept-equivalent regions (GADM L2)
- 314.5 km²28.0% of basin
- 171.8 km²15.3% of basin
- 156.7 km²14.0% of basin
- 147.1 km²13.1% of basin
- 109.3 km²9.7% of basin
- YatsushiroKumamoto · Japan52.3 km²4.7% of basin
- SatsumasendaiKagoshima · Japan44.2 km²3.9% of basin
- 34.5 km²3.1% of basin
25 intersecting protected areas
Ashikita kaigan
IUCN VPrefectural Natural Park
66.67 km² overlap
Common fishery right area
59.42 km² overlap
Nagashima
IUCN IVPrefectural Wildlife Protection Area
38.74 km² overlap
Unzen amakusa
IUCN VNational Park
33.06 km² overlap
Common fishery right area
25.53 km² overlap
Ashikita
IUCN IVPrefectural Wildlife Protection Area
16.90 km² overlap
Izumi-Takaono
IUCN IVNational Wildlife Protection Area
8.56 km² overlap
Akune
IUCN VPrefectural Natural Park
6.89 km² overlap
Minamata
IUCN IVPrefectural Wildlife Protection Area
6.38 km² overlap
16 more protected areassorted by overlap area
Sendai gawa ryuiki
IUCN VPrefectural Natural Park
6.22 km² overlap
Wetland of International Importance (Ramsar Site)
4.78 km² overlap
Tobashira oshima
IUCN IVPrefectural Wildlife Protection Area
3.11 km² overlap
Kumagawa kako
IUCN IVPrefectural Wildlife Protection Area
1.62 km² overlap
Fukuhama
IUCN IVPrefectural Wildlife Protection Area
1.61 km² overlap
Kogawa
IUCN IVPrefectural Wildlife Protection Area
1.11 km² overlap
Maizuru koen
IUCN IVPrefectural Wildlife Protection Area
0.50 km² overlap
Izumi shogakko
IUCN IVPrefectural Wildlife Protection Area
0.45 km² overlap
Yuzuriha
IUCN IVPrefectural Wildlife Protection Area
0.31 km² overlap
Rare Population Protected Forest
0.28 km² overlap
Okawa
IUCN VPrefectural Nature Conservation Area
0.26 km² overlap
Shibisan Buna To Idenshigen
IUCN IVRare Population Protected Forest
0.19 km² overlap
Rare Population Protected Forest
0.06 km² overlap
Xxx
IUCN IVRare Population Protected Forest
0.04 km² overlap
Ono shogakko
IUCN IVPrefectural Wildlife Protection Area
0.04 km² overlap
Muta shitsugen
IUCN VPrefectural Nature Conservation Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 480 distinct species · 71 694 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 21 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 佐敷川 : 13 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 49 interactions GloBI sur 2 types (connectance 19.4%, filtre Serrano α=0.2). 10 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°
15,7°C
Annual rain
2 371mm
Moisture idx (CMI)
0,55
Runoff
1 446mm/an
PET
1 064mm
AET
1 064mm
Mean slope
10,5°
Water table
314cm
Forest
68%
Crops
11%
Urban
12%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)