Rivière· 23 segments

円山川

Crosses 3 administrative regions : Asago, Toyooka, Yabu

rivière

Total length

65km

Max discharge

52,4m³/s

Max Strahler

Segments matched

River geography3 admin regions · 0 communes

Parent watershed

hybas-40800424901305 km²

3 administrative regions crossed (GADM L2)

Asago
Hyōgo · Japan
24.8 km
in this dpt
Toyooka
Hyōgo · Japan
19.8 km
in this dpt
Yabu
Hyōgo · Japan
6.5 km
in this dpt

10 intersecting protected areas

Saninkaigan
IUCN V
National Park
Asago Gunsan
IUCN V
Prefectural Natural Park
Lower Maruyama River and the Surrounding Rice Paddies
IUCN IV
Wetland of International Importance (Ramsar Site)
Maruyamagawa karyuiki
IUCN IV
National Wildlife Protection Area
Kinosaki
IUCN IV
Prefectural Wildlife Protection Area
Sasaura
IUCN IV
Prefectural Wildlife Protection Area
Toyooka nanbu
IUCN IV
Prefectural Wildlife Protection Area
Nishiyama
IUCN IV
Prefectural Wildlife Protection Area
Stork friendly Nakasuji Satoyama landscape
IUCN Not Applicable
OECM

1 more protected areassorted by area

Nojo
IUCN IV
Prefectural Wildlife Protection Area

1 page = 1 named river (aggregation of 23 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

304 distinct species · 537 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 9 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 円山川 : 8 espèces reliées par 6 interactions GloBI sur 2 types (connectance 16.7%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.167

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)