Ontologia

HydroBASINS lev08 watershed · #4080271990

Bassin de 天塩川

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 6 administrative regions : Enbetsu, Horonobe, Nakagawa, Sarufutsu, Teshio +1

Pfafstetter: 41200143

Sub-basin area

920,9km²

Upstream area

4 897,9km²

Discharge

130,81m³/s

Mean elev.

103m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de イワナ川49 km²

▲ Receives from 2 basins

6 dept-equivalent regions (GADM L2)

8 intersecting protected areas

  • Hokudai nakagawa kenkyurin

    IUCN IV

    Prefectural Wildlife Protection Area

    104.21 km² overlap

  • Hokudai teshio kenkyurin

    IUCN IV

    Prefectural Wildlife Protection Area

    3.23 km² overlap

  • Horonobe

    IUCN IV

    Prefectural Wildlife Protection Area

    1.91 km² overlap

  • Dannoppu

    IUCN IV

    Prefectural Wildlife Protection Area

    1.70 km² overlap

  • Shirikoma

    IUCN IV

    Prefectural Wildlife Protection Area

    0.41 km² overlap

  • Shirikoma

    IUCN IV

    Biocenosis Protected Forest

    0.35 km² overlap

  • Nakagawa

    IUCN V

    Environmental Green Space Protection Area(Hokkaido)

    0.25 km² overlap

  • Rishiri rebun sarobetsu

    IUCN II

    National Park

    0.01 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

697 distinct species · 6 904 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 904 obs · 26 cellules
Obs. / cellule
≥ 1 225
885–1 224
352–884
115–351
< 115

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Ecological tissue

Sample of 45 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

Indicateurs du tissu écologique

Tissu écologique de Bassin de 天塩川 : 40 espèces reliées par 40 interactions GloBI sur 4 types (connectance 4.0%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
45
Interactions affichées
40
Connectance
0.040
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

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

Hydroclimate (BasinATLAS lev08)

Mean T°

5,9°C

Annual rain

1 241mm

Moisture idx (CMI)

0,50

Runoff

902mm/an

PET

617mm

AET

595mm

Mean slope

6,7°

Water table

174cm

Forest

75%

Crops

0%

Urban

0%

Protected

12%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)