Ruisseau· 10 segments

里川

Crosses 4 administrative regions : Hitachi, Hitachiōta, Naka, Yamatsuri

ruisseau

Total length

73km

Max discharge

4,7m³/s

Max Strahler

Segments matched

River geography4 admin regions · 0 communes

Parent watershed

hybas-40800444901481 km²

4 administrative regions crossed (GADM L2)

Hitachiōta
Ibaraki · Japan
45.1 km
in this dpt
Hitachi
Ibaraki · Japan
5.1 km
in this dpt
Naka
Ibaraki · Japan
0.4 km
in this dpt
Yamatsuri
Fukushima · Japan
0.0 km
in this dpt

9 intersecting protected areas

Hanazono hananuki
IUCN V
Prefectural Natural Park
Ota
IUCN V
Prefectural Natural Park
Ozato
IUCN IV
Prefectural Wildlife Protection Area
Onaka
IUCN IV
Prefectural Wildlife Protection Area
Osuga
IUCN IV
Prefectural Wildlife Protection Area
Goridaira
IUCN IV
Prefectural Wildlife Protection Area
Nabeashi san
IUCN V
Prefectural Nature Conservation Area
Tamadare
IUCN V
Prefectural Nature Conservation Area
Tokorosanno megaten! Kagakunosato
IUCN Not Applicable
OECM

1 page = 1 named river (aggregation of 10 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

35 distinct species · 63 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de 里川 : 7 espèces reliées par 6 interactions GloBI sur 3 types (connectance 21.4%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.214

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)