HydroBASINS lev08 watershed · #4080045190
Bassin de 大井川
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 15 administrative regions : Fujieda, Hamamatsu, Hayakawa, Iida, Ina +10
Sub-basin area
1 291,9km²
Upstream area
1 291,9km²
Discharge
52,47m³/s
Mean elev.
1 102m
Administrative coverage
15 dept-equivalent regions (GADM L2)
- 493.8 km²38.2% of basin
- 454.5 km²35.2% of basin
- 164.3 km²12.7% of basin
- 116.2 km²9.0% of basin
- 14.5 km²1.1% of basin
- 12.2 km²0.9% of basin
- 11.3 km²0.9% of basin
- 6.6 km²0.5% of basin
29 intersecting protected areas
Senzumisakubo
IUCN IVPrefectural Wildlife Protection Area
182.86 km² overlap
Ikawa mountains and forest
IUCN Not ApplicableOECM
117.12 km² overlap
Minami alps
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
107.15 km² overlap
Minami-Alps
IUCN IVPrefectural Wildlife Protection Area
102.37 km² overlap
Okuoi
IUCN VPrefectural Natural Park
87.80 km² overlap
Forest Ecosystem Reserve
28.59 km² overlap
Minami alps
IUCN IINational Park
24.30 km² overlap
Tokaisizenhodokawane
IUCN IVPrefectural Wildlife Protection Area
16.97 km² overlap
Oigawa genryubu
IUCN IaWilderness Area
10.56 km² overlap
20 more protected areassorted by overlap area
Oigawakako
IUCN IVPrefectural Wildlife Protection Area
9.04 km² overlap
Oziro
IUCN IVPrefectural Wildlife Protection Area
8.49 km² overlap
Ikawako
IUCN IVPrefectural Wildlife Protection Area
7.34 km² overlap
Tokaishizenhodo sida
IUCN IVPrefectural Wildlife Protection Area
4.55 km² overlap
Chibasan
IUCN IVPrefectural Wildlife Protection Area
3.61 km² overlap
Sawarajima
IUCN IVPrefectural Wildlife Protection Area
2.40 km² overlap
Othusyogakko
IUCN IVPrefectural Wildlife Protection Area
0.93 km² overlap
Minami alps nanbu
IUCN IVPrefectural Wildlife Protection Area
0.74 km² overlap
Tokaisizenhodomori
IUCN IVPrefectural Wildlife Protection Area
0.60 km² overlap
Minamiarupusu（Hijiridaketo）
IUCN IVBiocenosis Protected Forest
0.49 km² overlap
Common fishery right area
0.43 km² overlap
Prefectural Wildlife Protection Area
0.33 km² overlap
Hakuho
IUCN IVPrefectural Wildlife Protection Area
0.25 km² overlap
Zaruga take
IUCN VPrefectural Nature Conservation Area
0.17 km² overlap
Tokaishizenhodohoruno
IUCN IVPrefectural Wildlife Protection Area
0.09 km² overlap
Mitsuminegawa joryu
IUCN IVPrefectural Wildlife Protection Area
0.04 km² overlap
Minamiarupusu（Shiomito）
IUCN IVBiocenosis Protected Forest
0.04 km² overlap
Kuchisakamoto
IUCN IVPrefectural Wildlife Protection Area
0.00 km² overlap
Kawakami Tsuga・Harimomi
IUCN IVRare Population Protected Forest
0.00 km² overlap
Zarugatake
IUCN IVPrefectural Wildlife Protection Area
0.00 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 879 distinct species · 10 292 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 8 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 大井川 : 6 espèces reliées par 9 interactions GloBI sur 2 types (connectance 25.0%, filtre Serrano α=0.2). 3 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°
9,4°C
Annual rain
2 176mm
Moisture idx (CMI)
0,60
Runoff
1 216mm/an
PET
863mm
AET
863mm
Mean slope
24,0°
Water table
759cm
Forest
84%
Crops
6%
Urban
7%
Protected
35%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)