HydroBASINS lev08 watershed · #4080040800
Bassin de 重信川
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 : Imabari, Iyo, Kumakōgen, Masaki, Matsuyama +3
Sub-basin area
475,1km²
Upstream area
475,3km²
Discharge
10,76m³/s
Mean elev.
385m
Administrative coverage
8 dept-equivalent regions (GADM L2)
- 227.6 km²47.9% of basin
- 170.9 km²36.0% of basin
- 55.4 km²11.7% of basin
- 6.8 km²1.4% of basin
- 4.9 km²1.0% of basin
- 3.6 km²0.8% of basin
- 3.4 km²0.7% of basin
- 2.3 km²0.5% of basin
12 intersecting protected areas
Okudogo tama gawa
IUCN VPrefectural Natural Park
46.18 km² overlap
Saragamine renpo
IUCN VPrefectural Natural Park
16.68 km² overlap
Shimoidai dogoyama
IUCN IVPrefectural Wildlife Protection Area
4.70 km² overlap
Saragamine misakatoge
IUCN IVPrefectural Wildlife Protection Area
3.31 km² overlap
Choshi dam
IUCN IVPrefectural Wildlife Protection Area
1.75 km² overlap
PREFECTURAL FOREST IN EHIME PREFECTURE
IUCN Not ApplicableOECM
1.28 km² overlap
Tagamisan
IUCN IVPrefectural Wildlife Protection Area
0.32 km² overlap
Senzoku miyauchi
IUCN IVPrefectural Wildlife Protection Area
0.18 km² overlap
Setonaikai
IUCN VNational Park
0.13 km² overlap
3 more protected areassorted by overlap area
Takanawasan
IUCN IVPrefectural Wildlife Protection Area
0.11 km² overlap
Kutsunashichito kaiiki
IUCN IVPrefectural Wildlife Protection Area
0.07 km² overlap
Common fishery right area
0.06 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 070 distinct species · 6 082 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 32 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 重信川 : 25 espèces reliées par 49 interactions GloBI sur 3 types (connectance 9.3%, filtre Serrano α=0.2). 8 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°
13,8°C
Annual rain
1 713mm
Moisture idx (CMI)
0,42
Runoff
849mm/an
PET
975mm
AET
968mm
Mean slope
13,0°
Water table
365cm
Forest
69%
Crops
6%
Urban
26%
Protected
17%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)