HydroBASINS lev08 watershed · #4080043650
Bassin de 岩木川
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 20 administrative regions : Ajigasawa, Aomori, Fujisaki, Fujisato, Goshogawara +15
Sub-basin area
2 437,2km²
Upstream area
2 437,2km²
Discharge
84,84m³/s
Mean elev.
249m
Administrative coverage
20 dept-equivalent regions (GADM L2)
- 497.6 km²20.4% of basin
- GoshogawaraAomori · Japan348.9 km²14.3% of basin
- 323.4 km²13.3% of basin
- 227.9 km²9.3% of basin
- 217.4 km²8.9% of basin
- 207.3 km²8.5% of basin
- NakadomariAomori · Japan150.2 km²6.2% of basin
- 147.0 km²6.0% of basin
30 intersecting protected areas
Shirakami Hakkoda
IUCN VGreen Corridor
80.54 km² overlap
Prefectural Natural Park
66.22 km² overlap
Tsugaru
IUCN VQuasi National Park
65.42 km² overlap
Kuroishi Onsenkyo
IUCN VPrefectural Natural Park
49.10 km² overlap
Towada hachimantai
IUCN IINational Park
38.94 km² overlap
Shirakami Sanchi
IUCN IbForest Ecosystem Reserve
35.74 km² overlap
Shirakamisanchi
IUCN IVNational Wildlife Protection Area
35.43 km² overlap
Shirakami-Sanchi
IUCN Not ApplicableWorld Heritage Site (natural or mixed)
33.95 km² overlap
Shirakami sanchi
IUCN IbNature Conservation Area
23.13 km² overlap
21 more protected areassorted by overlap area
Iwaki kogen
IUCN VPrefectural Natural Park
22.81 km² overlap
Ajara
IUCN IVPrefectural Wildlife Protection Area
21.89 km² overlap
Jusanko
IUCN IVPrefectural Wildlife Protection Area
20.76 km² overlap
Tsugaru shirakami
IUCN VPrefectural Natural Park
20.16 km² overlap
Towada
IUCN IVNational Wildlife Protection Area
14.67 km² overlap
Iwakisan
IUCN IVPrefectural Wildlife Protection Area
13.61 km² overlap
Hirakawa-aseishigawa
IUCN IVPrefectural Wildlife Protection Area
13.02 km² overlap
Hakkodasan
IUCN IVBiocenosis Protected Forest
12.24 km² overlap
Izume
IUCN IVPrefectural Wildlife Protection Area
12.06 km² overlap
Shigisawayama
IUCN IVPrefectural Wildlife Protection Area
8.15 km² overlap
Okawa
IUCN IVPrefectural Wildlife Protection Area
7.71 km² overlap
Ouu Mountain Range
IUCN VGreen Corridor
6.81 km² overlap
Shiura
IUCN IVPrefectural Wildlife Protection Area
6.72 km² overlap
Zatoishi
IUCN IVPrefectural Wildlife Protection Area
6.04 km² overlap
Ashinochishogun
IUCN VPrefectural Natural Park
6.01 km² overlap
Bonju
IUCN IVPrefectural Wildlife Protection Area
5.32 km² overlap
Tsugaru Shirakamiko
IUCN IVPrefectural Wildlife Protection Area
3.69 km² overlap
Kutoji
IUCN IVPrefectural Wildlife Protection Area
3.33 km² overlap
Iwakigawa
IUCN IVPrefectural Wildlife Protection Area
3.25 km² overlap
Tonosakiyama
IUCN IVPrefectural Wildlife Protection Area
2.93 km² overlap
Oppu dake
IUCN VPrefectural Nature Conservation Area
2.88 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 990 distinct species · 9 577 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 28 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 岩木川 : 21 espèces reliées par 50 interactions GloBI sur 4 types (connectance 10.1%, 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°
9,3°C
Annual rain
1 386mm
Moisture idx (CMI)
0,41
Runoff
972mm/an
PET
808mm
AET
745mm
Mean slope
8,1°
Water table
247cm
Forest
74%
Crops
4%
Urban
13%
Protected
16%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)