HydroBASINS lev08 watershed · #4080037450
Bassin de 小平蘂川
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 4 administrative regions : Numata, Obira, Rumoi, Tomamae
Sub-basin area
470,6km²
Upstream area
470,6km²
Discharge
17,5m³/s
Mean elev.
212m
Administrative coverage
4 dept-equivalent regions (GADM L2)
- 448.9 km²95.2% of basin
- 14.9 km²3.2% of basin
- 4.6 km²1.0% of basin
- 3.0 km²0.6% of basin
3 intersecting protected areas
Tappu
IUCN IVPrefectural Wildlife Protection Area
4.98 km² overlap
Obiracho hongo koen
IUCN IVPrefectural Wildlife Protection Area
0.09 km² overlap
Tappu Yachidamo Idenshigen
IUCN IVRare Population Protected Forest
0.05 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
69 distinct species · 129 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 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 小平蘂川 : 19 espèces reliées par 12 interactions GloBI sur 4 types (connectance 6.3%, 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°
6,1°C
Annual rain
1 314mm
Moisture idx (CMI)
0,46
Runoff
1 036mm/an
PET
715mm
AET
657mm
Mean slope
11,0°
Water table
292cm
Forest
99%
Crops
2%
Urban
0%
Protected
1%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)