HydroBASINS lev08 watershed · #4080040810
Bassin de 蒼社川
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 3 administrative regions : Imabari, Matsuyama, Saijō
Sub-basin area
601km²
Upstream area
601km²
Discharge
7,94m³/s
Mean elev.
176m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 282.3 km²47.0% of basin
- 199.5 km²33.2% of basin
- 67.3 km²11.2% of basin
13 intersecting protected areas
Setonaikai
IUCN VNational Park
98.85 km² overlap
Common fishery right area
50.52 km² overlap
Kutsunashichito kaiiki
IUCN IVPrefectural Wildlife Protection Area
29.42 km² overlap
Okudogo tama gawa
IUCN VPrefectural Natural Park
10.08 km² overlap
Shimoidai dogoyama
IUCN IVPrefectural Wildlife Protection Area
3.36 km² overlap
Takanawa
IUCN IVPrefectural Wildlife Protection Area
2.36 km² overlap
Tamagawa dam
IUCN IVPrefectural Wildlife Protection Area
1.99 km² overlap
Shishimagahara karakohama
IUCN IVPrefectural Wildlife Protection Area
1.54 km² overlap
Takanawasan
IUCN IVPrefectural Wildlife Protection Area
0.73 km² overlap
4 more protected areassorted by overlap area
Matsuyamajo
IUCN IVPrefectural Wildlife Protection Area
0.59 km² overlap
Nishiyama
IUCN IVPrefectural Wildlife Protection Area
0.18 km² overlap
PREFECTURAL FOREST IN EHIME PREFECTURE
IUCN Not ApplicableOECM
0.07 km² overlap
Odagahama beach in Imabari, Ehime
IUCN Not ApplicableOECM
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
768 distinct species · 4 421 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 蒼社川 : 24 espèces reliées par 32 interactions GloBI sur 2 types (connectance 7.9%, filtre Serrano α=0.2). 5 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°
14,9°C
Annual rain
1 501mm
Moisture idx (CMI)
0,31
Runoff
808mm/an
PET
1 020mm
AET
1 005mm
Mean slope
8,2°
Water table
267cm
Forest
31%
Crops
18%
Urban
34%
Protected
20%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)