HydroBASINS lev08 watershed · #4080040840
Bassin de 中山川
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 : Kumakōgen, Saijō, Tōon
Sub-basin area
201,4km²
Upstream area
201,6km²
Discharge
6,39m³/s
Mean elev.
418m
Administrative coverage
3 dept-equivalent regions (GADM L2)
- 163.7 km²81.3% of basin
- 35.4 km²17.6% of basin
- 1.7 km²0.8% of basin
6 intersecting protected areas
Ishizuchi
IUCN VQuasi National Park
5.67 km² overlap
Ishizuchisankei
IUCN IVNational Wildlife Protection Area
5.65 km² overlap
Ishizuchi Sankei
IUCN IbForest Ecosystem Reserve
4.11 km² overlap
Saragamine renpo
IUCN VPrefectural Natural Park
0.99 km² overlap
PREFECTURAL FOREST IN EHIME PREFECTURE
IUCN Not ApplicableOECM
0.00 km² overlap
Shikoku Mountains
IUCN VGreen Corridor
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
242 distinct species · 390 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 中山川 : 25 espèces reliées par 22 interactions GloBI sur 3 types (connectance 6.8%, filtre Serrano α=0.2). 1 bulle taxonomique (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°
13,6°C
Annual rain
1 789mm
Moisture idx (CMI)
0,44
Runoff
964mm/an
PET
973mm
AET
967mm
Mean slope
16,1°
Water table
442cm
Forest
62%
Crops
15%
Urban
18%
Protected
4%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)