HydroBASINS lev08 watershed · #4080045330
Bassin de 矢作川
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 23 administrative regions : Achi, Anjō, Ena, Gamagōri, Hekinan +18
Sub-basin area
1 897,9km²
Upstream area
1 897,9km²
Discharge
53,18m³/s
Mean elev.
441m
Administrative coverage
23 dept-equivalent regions (GADM L2)
- 845.9 km²44.6% of basin
- 373.7 km²19.7% of basin
- 243.4 km²12.8% of basin
- 89.9 km²4.7% of basin
- 69.0 km²3.6% of basin
- 63.9 km²3.4% of basin
- 55.9 km²2.9% of basin
- 44.7 km²2.4% of basin
15 moreFull L2 list
- Nishio39.0 km² · 2.1%
- Shinshiro35.8 km² · 1.9%
- Hekinan12.9 km² · 0.7%
- Nakatsugawa8.1 km² · 0.4%
- Toki4.8 km² · 0.3%
- Seto4.6 km² · 0.2%
- Mizunami2.6 km² · 0.1%
- Achi1.0 km² · 0.1%
- Nagakute0.5 km² · 0.0%
- Kariya0.5 km² · 0.0%
- Kira0.3 km² · 0.0%
- Urugi0.3 km² · 0.0%
- Otowa0.1 km² · 0.0%
- Toyokawa0.0 km² · 0.0%
- Gamagōri0.0 km² · 0.0%
30 intersecting protected areas
Aichikogen
IUCN VQuasi National Park
173.17 km² overlap
Tenryu-Okumikawa
IUCN VQuasi National Park
23.09 km² overlap
Hongu san
IUCN VPrefectural Natural Park
21.21 km² overlap
Dando kogen
IUCN VPrefectural Natural Park
15.26 km² overlap
Okazaki tobu
IUCN IVPrefectural Wildlife Protection Area
10.61 km² overlap
Chausuyama maruyama
IUCN IVPrefectural Wildlife Protection Area
10.31 km² overlap
Mikawawan
IUCN VQuasi National Park
6.87 km² overlap
Showano mori
IUCN IVPrefectural Wildlife Protection Area
6.68 km² overlap
Okazaki
IUCN IVPrefectural Wildlife Protection Area
6.57 km² overlap
21 more protected areassorted by overlap area
Tokkawa land of Fireflies
IUCN Not ApplicableOECM
5.10 km² overlap
Kuragari
IUCN IVPrefectural Wildlife Protection Area
4.73 km² overlap
Sanage
IUCN IVPrefectural Wildlife Protection Area
4.67 km² overlap
Kuragaike
IUCN IVPrefectural Wildlife Protection Area
4.66 km² overlap
Asuke
IUCN IVPrefectural Wildlife Protection Area
4.26 km² overlap
Kamiyahagiohunayama
IUCN IVPrefectural Wildlife Protection Area
4.25 km² overlap
Toyota Technical Center Shimoyama
IUCN Not ApplicableOECM
3.86 km² overlap
Ikimonofureaino sato
IUCN IVPrefectural Wildlife Protection Area
3.12 km² overlap
Rokushosan
IUCN IVPrefectural Wildlife Protection Area
2.38 km² overlap
Toki mikuni yama
IUCN VPrefectural Natural Park
2.31 km² overlap
Mikawako
IUCN IVPrefectural Wildlife Protection Area
2.04 km² overlap
Ohirata
IUCN IVPrefectural Wildlife Protection Area
1.31 km² overlap
Otaki keikoku
IUCN IVPrefectural Wildlife Protection Area
1.22 km² overlap
Mennoki
IUCN IVPrefectural Wildlife Protection Area
1.21 km² overlap
Sanageyama
IUCN IVPrefectural Wildlife Protection Area
1.16 km² overlap
Isegami kogen
IUCN IVPrefectural Wildlife Protection Area
1.13 km² overlap
Oidaira shogakko
IUCN IVPrefectural Wildlife Protection Area
1.03 km² overlap
Nokiyama
IUCN IVPrefectural Wildlife Protection Area
0.99 km² overlap
Asahi kogen
IUCN IVPrefectural Wildlife Protection Area
0.92 km² overlap
Dandouradani
IUCN IVPrefectural Wildlife Protection Area
0.92 km² overlap
Kojimaen
IUCN Not ApplicableOECM
0.62 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
4 347 distinct species · 29 808 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 38 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 矢作川 : 31 espèces reliées par 36 interactions GloBI sur 4 types (connectance 5.1%, filtre Serrano α=0.2). 7 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°
13,2°C
Annual rain
1 992mm
Moisture idx (CMI)
0,49
Runoff
1 011mm/an
PET
992mm
AET
992mm
Mean slope
9,7°
Water table
329cm
Forest
79%
Crops
2%
Urban
21%
Protected
18%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)