HydroBASINS lev08 watershed · #4080045260
Bassin de 豊川
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 21 administrative regions : Arai, Gamagōri, Hamamatsu, Hazu, Isshiki +16
Sub-basin area
2 046,3km²
Upstream area
2 046,3km²
Discharge
8,61m³/s
Mean elev.
166m
Administrative coverage
21 dept-equivalent regions (GADM L2)
- 478.4 km²23.4% of basin
- 468.9 km²22.9% of basin
- 259.0 km²12.7% of basin
- 184.1 km²9.0% of basin
- 155.3 km²7.6% of basin
- 101.5 km²5.0% of basin
- 54.8 km²2.7% of basin
- 49.8 km²2.4% of basin
30 intersecting protected areas
Hamana ko
IUCN VPrefectural Natural Park
125.45 km² overlap
Atsumi hanto
IUCN VPrefectural Natural Park
122.81 km² overlap
Mikawawan
IUCN VQuasi National Park
95.30 km² overlap
Tenryu-Okumikawa
IUCN VQuasi National Park
71.44 km² overlap
Hongu san
IUCN VPrefectural Natural Park
51.37 km² overlap
Mikkabiseibu
IUCN IVPrefectural Wildlife Protection Area
31.94 km² overlap
Common fishery right area
28.35 km² overlap
Sakurabuchi
IUCN VPrefectural Natural Park
25.42 km² overlap
Tenryugawaiseiensyunada
IUCN IVPrefectural Wildlife Protection Area
24.44 km² overlap
21 more protected areassorted by overlap area
Irago
IUCN IVPrefectural Wildlife Protection Area
22.19 km² overlap
Dando kogen
IUCN VPrefectural Natural Park
22.14 km² overlap
Aichikogen
IUCN VQuasi National Park
21.32 km² overlap
Ishimaki san tame
IUCN VPrefectural Natural Park
20.81 km² overlap
Horaiko
IUCN IVPrefectural Wildlife Protection Area
16.03 km² overlap
Otsudani
IUCN IVPrefectural Wildlife Protection Area
9.85 km² overlap
Mikawananbu
IUCN IVPrefectural Wildlife Protection Area
8.98 km² overlap
Hamakitahokuseibu
IUCN IVPrefectural Wildlife Protection Area
8.28 km² overlap
Kosaishi ochiba
IUCN IVPrefectural Wildlife Protection Area
8.04 km² overlap
Kosairenpo
IUCN IVPrefectural Wildlife Protection Area
6.50 km² overlap
Inohanako
IUCN IVPrefectural Wildlife Protection Area
6.33 km² overlap
Kanzanzi
IUCN IVPrefectural Wildlife Protection Area
6.15 km² overlap
Hosoekoshuhen
IUCN IVPrefectural Wildlife Protection Area
3.72 km² overlap
Kiga
IUCN IVPrefectural Wildlife Protection Area
3.50 km² overlap
Tokaishizenhodohokuen
IUCN IVPrefectural Wildlife Protection Area
3.34 km² overlap
Hosoekoenyama
IUCN IVPrefectural Wildlife Protection Area
3.32 km² overlap
Nishiura shogakko
IUCN IVPrefectural Wildlife Protection Area
2.70 km² overlap
Shibukawa
IUCN VPrefectural Nature Conservation Area
2.08 km² overlap
Katahara-kashima
IUCN IVPrefectural Wildlife Protection Area
2.01 km² overlap
Ise shima
IUCN VNational Park
1.95 km² overlap
Ichinomiya chugakko
IUCN IVPrefectural Wildlife Protection Area
1.54 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
3 451 distinct species · 31 341 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 26 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 豊川 : 21 espèces reliées par 33 interactions GloBI sur 2 types (connectance 9.4%, filtre Serrano α=0.2). 6 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°
15,0°C
Annual rain
1 981mm
Moisture idx (CMI)
0,49
Runoff
1 055mm/an
PET
996mm
AET
996mm
Mean slope
7,6°
Water table
258cm
Forest
45%
Crops
8%
Urban
47%
Protected
31%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)