Rivière· 100 segments
千曲川
Crosses 20 administrative regions : Chichibu, Chikuma, Iiyama, Kawakami, Komoro +15
Total length
211km
Max discharge
271m³/s
Max Strahler
6
Segments matched
100
River geography20 admin regions · 0 communes
20 administrative regions crossed (GADM L2)
- NaganoNagano · Japan46.5 kmin this dpt
- KawakamiNagano · Japan26.7 kmin this dpt
- IiyamaNagano · Japan25.6 kmin this dpt
- MinamimakNagano · Japan20.4 kmin this dpt
- ChikumaNagano · Japan18.9 kmin this dpt
- SakuNagano · Japan18.5 kmin this dpt
- NakanoNagano · Japan12.9 kmin this dpt
- SakaeNagano · Japan10.8 kmin this dpt
- UedaNagano · Japan10.8 kmin this dpt
- KoumiNagano · Japan7.4 kmin this dpt
- KomoroNagano · Japan5.0 kmin this dpt
- SakakiNagano · Japan4.5 kmin this dpt
- SakuhoNagano · Japan4.4 kmin this dpt
- TōmiNagano · Japan3.1 kmin this dpt
- TsunanNiigata · Japan2.0 kmin this dpt
- SuzakaNagano · Japan1.9 kmin this dpt
- NozawaonsenNagano · Japan1.9 kmin this dpt
- ObuseNagano · Japan1.5 kmin this dpt
- MinamiaikiNagano · Japan0.0 kmin this dpt
- ChichibuSaitama · Japan0.0 kmin this dpt
13 intersecting protected areas
Chichibu tama kai
IUCN VNational Park
Yatsugatake-Chushinkogen
IUCN VQuasi National Park
Chichibu Mountains
IUCN VGreen Corridor
Okuchichibu
IUCN IVPrefectural Wildlife Protection Area
Kinpozan
IUCN IVPrefectural Wildlife Protection Area
Hijiri yama kogen
IUCN VPrefectural Natural Park
Nagamine
IUCN IVPrefectural Wildlife Protection Area
Kosugeyama
IUCN VLocal Environment Conservation Area(Nagano)
Hokuryuko
IUCN IVPrefectural Wildlife Protection Area
4 more protected areassorted by area
Uminokuchi
IUCN IVPrefectural Wildlife Protection Area
Matsubara ko kogen
IUCN IVPrefectural Wildlife Protection Area
Minamimaki
IUCN IVPrefectural Wildlife Protection Area
Daiunji
IUCN VLocal Environment Conservation Area(Nagano)
1 page = 1 named river (aggregation of 100 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
603 distinct species · 1 146 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 20 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 千曲川 : 17 espèces reliées par 19 interactions GloBI sur 6 types (connectance 10.0%, 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).
Hydrology (HydroRIVERS v10)
Total length
211km
Max discharge
271,0m³/s
Max Strahler
6
Segments matched
100
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.