HydroBASINS lev08 watershed · #4080605590
Bassin de 天竜川
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 26 administrative regions : Achi, Agematsu, Anan, Hiraya, Iida +21
Sub-basin area
1 755,7km²
Upstream area
3 269,3km²
Discharge
106,28m³/s
Mean elev.
1 062m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 上川1010 km²
- Bassin de 三峰川503 km²
26 dept-equivalent regions (GADM L2)
- 325.4 km²18.5% of basin
- 238.8 km²13.6% of basin
- 169.6 km²9.7% of basin
- 162.5 km²9.3% of basin
- 103.9 km²5.9% of basin
- 98.0 km²5.6% of basin
- 77.5 km²4.4% of basin
- NakagawaNagano · Japan69.1 km²3.9% of basin
18 moreFull L2 list
- Toyooka68.8 km² · 3.9%
- Takagi66.2 km² · 3.8%
- Yasuoka66.2 km² · 3.8%
- Ina59.0 km² · 3.4%
- Takamori47.6 km² · 2.7%
- Shimojō44.7 km² · 2.5%
- Seinaiji43.5 km² · 2.5%
- Miyada37.6 km² · 2.1%
- Urugi37.4 km² · 2.1%
- Hiraya13.0 km² · 0.7%
- Tenryū9.8 km² · 0.6%
- Ōkuwa6.1 km² · 0.3%
- Nagiso4.7 km² · 0.3%
- Nakatsugawa3.1 km² · 0.2%
- Shizuoka2.0 km² · 0.1%
- Agematsu0.6 km² · 0.0%
- Neba0.4 km² · 0.0%
- Kiso0.2 km² · 0.0%
30 intersecting protected areas
Chuo alps
IUCN VQuasi National Park
204.84 km² overlap
Minami alps
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
78.64 km² overlap
Minami alps
IUCN IINational Park
39.27 km² overlap
Tenryu-Okumikawa
IUCN VQuasi National Park
38.39 km² overlap
Komagane kogen
IUCN IVPrefectural Wildlife Protection Area
38.02 km² overlap
Minami alps nanbu
IUCN IVPrefectural Wildlife Protection Area
34.86 km² overlap
Tenryukoshibu suikei
IUCN VPrefectural Natural Park
26.08 km² overlap
Koshibu dam shuhen
IUCN IVPrefectural Wildlife Protection Area
22.93 km² overlap
Chuoarupusu(Komagatake)
IUCN IVBiocenosis Protected Forest
21.73 km² overlap
21 more protected areassorted by overlap area
Minamiarupusu(Hijiridaketo)
IUCN IVBiocenosis Protected Forest
20.22 km² overlap
Mangogawa
IUCN IVPrefectural Wildlife Protection Area
17.77 km² overlap
Takayama
IUCN IVPrefectural Wildlife Protection Area
9.46 km² overlap
Ozimayama
IUCN IVPrefectural Wildlife Protection Area
8.67 km² overlap
Maruyama
IUCN IVPrefectural Wildlife Protection Area
7.50 km² overlap
Sennin zuka
IUCN IVPrefectural Wildlife Protection Area
5.80 km² overlap
Nokiyama
IUCN IVPrefectural Wildlife Protection Area
5.60 km² overlap
Odairatoge kenminno mori
IUCN IVPrefectural Wildlife Protection Area
5.36 km² overlap
Miyada
IUCN IVPrefectural Wildlife Protection Area
3.61 km² overlap
Tenryukyo shuhen
IUCN IVPrefectural Wildlife Protection Area
3.52 km² overlap
Oodairajuku
IUCN VLocal Environment Conservation Area(Nagano)
2.98 km² overlap
Minami-Alps
IUCN IVPrefectural Wildlife Protection Area
2.79 km² overlap
Ujinoriyama
IUCN IVPrefectural Wildlife Protection Area
2.72 km² overlap
Minamiarupusu(Shiomito)
IUCN IVBiocenosis Protected Forest
2.56 km² overlap
Sawashiroko shuhen
IUCN IVPrefectural Wildlife Protection Area
2.29 km² overlap
Surikogi
IUCN IVPrefectural Wildlife Protection Area
1.99 km² overlap
Yamabuki
IUCN IVPrefectural Wildlife Protection Area
1.99 km² overlap
Nosokoyama
IUCN VLocal Environment Conservation Area(Nagano)
1.33 km² overlap
Tsubameiwa
IUCN IVRare Population Protected Forest
0.98 km² overlap
Toyoguchiyama Shida
IUCN IVRare Population Protected Forest
0.58 km² overlap
Yakyo
IUCN IVPrefectural Wildlife Protection Area
0.56 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 867 distinct species · 38 337 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 18 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 天竜川 : 14 espèces reliées par 19 interactions GloBI sur 2 types (connectance 12.4%, filtre Serrano α=0.2). 4 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°
9,3°C
Annual rain
1 881mm
Moisture idx (CMI)
0,49
Runoff
1 071mm/an
PET
927mm
AET
926mm
Mean slope
16,9°
Water table
510cm
Forest
84%
Crops
7%
Urban
8%
Protected
23%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)