Ruisseau· 3 segments
大川
Crosses 4 administrative regions : Hitachinaka, Minamiaizu, Naka, Nasushiobara
Total length
421km
Max discharge
0,8m³/s
Max Strahler
1
Segments matched
3
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
- HitachinakaIbaraki · Japan11.9 kmin this dpt
- NasushiobaraTochigi · Japan5.1 kmin this dpt
- NakaIbaraki · Japan4.6 kmin this dpt
- MinamiaizuFukushima · Japan0.0 kmin this dpt
6 intersecting protected areas
Nikko
IUCN VNational Park
Green Corridor
Nasu miyma
IUCN IVPrefectural Wildlife Protection Area
Osabisanchi
IUCN IVBiocenosis Protected Forest
Nanasen yama
IUCN VPrefectural Nature Conservation Area
Mito Works, Hitachi Group
IUCN Not ApplicableOECM
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
9 distinct species · 9 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 2 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 大川 : 2 espèces reliées par 1 interaction GloBI sur 1 type (connectance 100.0%, filtre Serrano α=0.2).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
421km
Max discharge
0,8m³/s
Max Strahler
1
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.