HydroBASINS lev08 watershed · #4080596350
Bassin de 笛吹川
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 16 administrative regions : Chichibu, Chūō, Fuefuki, Fujikawaguchiko, Hokuto +11
Sub-basin area
1 046km²
Upstream area
1 046,1km²
Discharge
27,16m³/s
Mean elev.
936m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
16 dept-equivalent regions (GADM L2)
- 287.5 km²27.5% of basin
- KōfuYamanashi · Japan203.3 km²19.4% of basin
- 202.1 km²19.3% of basin
- 193.4 km²18.5% of basin
- 53.1 km²5.1% of basin
- IchikawamisatoYamanashi · Japan37.6 km²3.6% of basin
- ChūōYamanashi · Japan31.8 km²3.0% of basin
- HokutoYamanashi · Japan8.5 km²0.8% of basin
8 moreFull L2 list
- Kawakami6.7 km² · 0.6%
- Shōwa6.4 km² · 0.6%
- Minami-Alps4.9 km² · 0.5%
- Tabayama3.0 km² · 0.3%
- Fujikawaguchiko2.3 km² · 0.2%
- Ōtsuki1.9 km² · 0.2%
- Nirasaki1.8 km² · 0.2%
- Chichibu1.8 km² · 0.2%
28 intersecting protected areas
Chichibu tama kai
IUCN VNational Park
235.26 km² overlap
Chichibu renpo
IUCN IVPrefectural Wildlife Protection Area
72.55 km² overlap
Daibosatsu
IUCN IVPrefectural Wildlife Protection Area
13.14 km² overlap
Mitake
IUCN IVPrefectural Wildlife Protection Area
12.44 km² overlap
Sekisuiji
IUCN IVPrefectural Wildlife Protection Area
9.23 km² overlap
Katayama
IUCN IVPrefectural Wildlife Protection Area
6.43 km² overlap
Tosakayama
IUCN IVPrefectural Wildlife Protection Area
3.67 km² overlap
Koganesawa yama
IUCN VPrefectural Nature Conservation Area
3.36 km² overlap
Atagoyama
IUCN IVPrefectural Wildlife Protection Area
2.98 km² overlap
19 more protected areassorted by overlap area
Kinpozan
IUCN IVPrefectural Wildlife Protection Area
2.54 km² overlap
Kinpusan
IUCN IVPrefectural Wildlife Protection Area
2.16 km² overlap
Fujizukamanriki
IUCN IVPrefectural Wildlife Protection Area
1.92 km² overlap
Shibire ko
IUCN VPrefectural Natural Park
1.19 km² overlap
Fuji hakone izu
IUCN VNational Park
1.00 km² overlap
Okuchichibu
IUCN IVPrefectural Wildlife Protection Area
0.93 km² overlap
Kimpozan
IUCN IVBiocenosis Protected Forest
0.70 km² overlap
Chichibusanchi
IUCN IVBiocenosis Protected Forest
0.59 km² overlap
Shionoyama
IUCN IVPrefectural Wildlife Protection Area
0.46 km² overlap
Chichibu Mountains
IUCN VGreen Corridor
0.44 km² overlap
Sangunbashi
IUCN IVPrefectural Wildlife Protection Area
0.28 km² overlap
Mitsutoge
IUCN IVPrefectural Wildlife Protection Area
0.15 km² overlap
Kurodake
IUCN VPrefectural Nature Conservation Area
0.14 km² overlap
Koganezawa
IUCN IVPrefectural Wildlife Protection Area
0.08 km² overlap
Karasawayama
IUCN IVPrefectural Wildlife Protection Area
0.05 km² overlap
Chateau Mercian Jyonohira Vineyard
IUCN Not ApplicableOECM
0.05 km² overlap
Kurodake
IUCN IVPrefectural Wildlife Protection Area
0.04 km² overlap
Kamihagihara
IUCN IVPrefectural Wildlife Protection Area
0.01 km² overlap
Shibireko
IUCN IVPrefectural Wildlife Protection Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 454 distinct species · 16 805 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 笛吹川 : 31 espèces reliées par 67 interactions GloBI sur 3 types (connectance 7.8%, filtre Serrano α=0.2). 11 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°
10,0°C
Annual rain
1 575mm
Moisture idx (CMI)
0,36
Runoff
861mm/an
PET
959mm
AET
937mm
Mean slope
14,8°
Water table
445cm
Forest
75%
Crops
6%
Urban
22%
Protected
25%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)