HydroBASINS lev08 watershed · #4080041130
Bassin de 安田川
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 10 administrative regions : Aki, Geisei, Kami, Kitagawa, Kōnan +5
Sub-basin area
589,1km²
Upstream area
589,1km²
Discharge
0,18m³/s
Mean elev.
392m
Administrative coverage
10 dept-equivalent regions (GADM L2)
- 310.9 km²52.8% of basin
- 106.5 km²18.1% of basin
- 64.1 km²10.9% of basin
- 49.4 km²8.4% of basin
- 37.2 km²6.3% of basin
- 10.1 km²1.7% of basin
- 1.4 km²0.2% of basin
- 1.3 km²0.2% of basin
2 moreFull L2 list
- Naka0.3 km² · 0.0%
- Nankoku0.1 km² · 0.0%
16 intersecting protected areas
Uchiharano
IUCN IVPrefectural Wildlife Protection Area
8.54 km² overlap
Common fishery right area
8.21 km² overlap
Shikoku Mountains
IUCN VGreen Corridor
7.35 km² overlap
Nishibun
IUCN IVPrefectural Wildlife Protection Area
3.62 km² overlap
Teiyama
IUCN IVPrefectural Wildlife Protection Area
3.32 km² overlap
Tei sumiyoshi
IUCN VPrefectural Natural Park
3.09 km² overlap
Ryugado
IUCN VPrefectural Natural Park
2.70 km² overlap
Mitsubishi Corporation Thousand Year Forest(also known as Yataro's Forest)
IUCN Not ApplicableOECM
2.69 km² overlap
Kotogahama
IUCN IVPrefectural Wildlife Protection Area
2.08 km² overlap
7 more protected areassorted by overlap area
Yanase
IUCN VPrefectural Natural Park
1.15 km² overlap
Senbonyama
IUCN IVPrefectural Wildlife Protection Area
1.00 km² overlap
Rare Population Protected Forest
0.81 km² overlap
Higashiyama Forest Park - Aki City Kochi Prefecture and Tokio Marine & Nichido Forest for Future -
IUCN Not ApplicableOECM
0.78 km² overlap
Rare Population Protected Forest
0.08 km² overlap
Rare Population Protected Forest
0.04 km² overlap
Okumononobe
IUCN VPrefectural Natural Park
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 454 distinct species · 11 557 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 15 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 安田川 : 12 espèces reliées par 14 interactions GloBI sur 2 types (connectance 13.3%, 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°
14,5°C
Annual rain
2 254mm
Moisture idx (CMI)
0,59
Runoff
1 761mm/an
PET
919mm
AET
919mm
Mean slope
18,1°
Water table
496cm
Forest
89%
Crops
2%
Urban
6%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)