HydroBASINS lev08 watershed · #4080616910
Bassin de 水窪川
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 : Hamamatsu, Iida, Kawanehon, Tenryū
Sub-basin area
339,7km²
Upstream area
4 494,9km²
Discharge
148,01m³/s
Mean elev.
815m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 大千瀬川359 km²
- Bassin de 天竜川183 km²
4 dept-equivalent regions (GADM L2)
- 332.0 km²97.7% of basin
- 5.1 km²1.5% of basin
- 2.3 km²0.7% of basin
- 0.3 km²0.1% of basin
11 intersecting protected areas
Senzumisakubo
IUCN IVPrefectural Wildlife Protection Area
56.71 km² overlap
Tenryu-Okumikawa
IUCN VQuasi National Park
7.97 km² overlap
Tokaisizenhodotatsuyama
IUCN IVPrefectural Wildlife Protection Area
5.33 km² overlap
Forest Ecosystem Reserve
3.14 km² overlap
Minami alps
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
1.43 km² overlap
Tatsuyamacho omine
IUCN IVPrefectural Wildlife Protection Area
0.48 km² overlap
Okuoi
IUCN VPrefectural Natural Park
0.21 km² overlap
Sejiri Xxx
IUCN IVRare Population Protected Forest
0.21 km² overlap
Keta gawa
IUCN VPrefectural Nature Conservation Area
0.20 km² overlap
2 more protected areassorted by overlap area
Misakubo shizen kyuyorin
IUCN IVPrefectural Wildlife Protection Area
0.17 km² overlap
Tokaishizenhodohokuen
IUCN IVPrefectural Wildlife Protection Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
860 distinct species · 2 866 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
11,2°C
Annual rain
2 155mm
Moisture idx (CMI)
0,56
Runoff
1 158mm/an
PET
943mm
AET
943mm
Mean slope
25,0°
Water table
820cm
Forest
99%
Crops
0%
Urban
0%
Protected
21%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)