Rivière· 8 segments

思川

Crosses 8 administrative regions : Fujioka, Kanuma, Mibu, Nishikata, Nogi +3

rivière

Total length

117km

Max discharge

15,5m³/s

Max Strahler

Segments matched

River geography8 admin regions · 0 communes

Parent watershed

hybas-40805775402572 km²

8 administrative regions crossed (GADM L2)

Kanuma
Tochigi · Japan
35.3 km
in this dpt
Oyama
Tochigi · Japan
19.3 km
in this dpt
Tochigi
Tochigi · Japan
6.3 km
in this dpt
Nishikata
Tochigi · Japan
5.4 km
in this dpt
Nogi
Tochigi · Japan
3.4 km
in this dpt
Tsuga
Tochigi · Japan
3.1 km
in this dpt
Fujioka
Tochigi · Japan
0.1 km
in this dpt
Mibu
Tochigi · Japan
0.0 km
in this dpt

12 intersecting protected areas

Maenikko
IUCN V
Prefectural Natural Park
Watarase-yusuichi
IUCN Not Reported
Wetland of International Importance (Ramsar Site)
Watarase yusuichi
IUCN IV
National Wildlife Protection Area
Oyama
IUCN IV
Prefectural Wildlife Protection Area
Awano
IUCN IV
Prefectural Wildlife Protection Area
Kamidono
IUCN IV
Prefectural Wildlife Protection Area
Washijo
IUCN IV
Prefectural Wildlife Protection Area
Awano
IUCN V
Green Space Environment Conservation Area(Tochigi)
Kokubunji
IUCN IV
Prefectural Wildlife Protection Area

3 more protected areassorted by area

Ioji
IUCN IV
Prefectural Wildlife Protection Area
Iouji
IUCN V
Green Space Environment Conservation Area(Tochigi)
Souja
IUCN V
Green Space Environment Conservation Area(Tochigi)

1 page = 1 named river (aggregation of 8 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

282 distinct species · 508 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 27 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 思川 : 18 espèces reliées par 38 interactions GloBI sur 4 types (connectance 9.4%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.094

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)