Rivière· 5 segments
大沢川
Crosses 4 administrative regions : Fujisato, Hachimantai, Kitaakita, Noshiro
Total length
473km
Max discharge
9,1m³/s
Max Strahler
4
Segments matched
5
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
- FujisatoAkita · Japan7.6 kmin this dpt
- HachimantaiIwate · Japan7.3 kmin this dpt
- KitaakitaAkita · Japan0.9 kmin this dpt
- NoshiroAkita · Japan0.0 kmin this dpt
6 intersecting protected areas
Ouu Mountain Range
IUCN VGreen Corridor
Hachimantaishi yagamidake
IUCN IVPrefectural Wildlife Protection Area
Kimimachi zaka
IUCN VPrefectural Natural Park
Kimimachi zaka
IUCN IVPrefectural Wildlife Protection Area
Mato
IUCN IVPrefectural Wildlife Protection Area
Kurayama fuketsu
IUCN VPrefectural Nature Conservation Area
1 page = 1 named river (aggregation of 5 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
90 distinct species · 175 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 13 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 大沢川 : 12 espèces reliées par 10 interactions GloBI sur 2 types (connectance 11.0%, filtre Serrano α=0.2). 2 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
473km
Max discharge
9,1m³/s
Max Strahler
4
Segments matched
5
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.