Ontologia

HydroBASINS lev08 watershed · #4080043370

Bassin de 赤川

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 5 administrative regions : Mikawa, Murakami, Nishikawa, Sakata, Tsuruoka

4% lakePfafstetter: 41301338

Sub-basin area

877,8km²

Upstream area

877,9km²

Discharge

35,44m³/s

Mean elev.

470m

Administrative coverage

5 dept-equivalent regions (GADM L2)

17 intersecting protected areas

  • Bandai asahi

    IUCN II

    National Park

    238.77 km² overlap

  • Asahi Sanchi

    IUCN Ib

    Forest Ecosystem Reserve

    228.86 km² overlap

  • Otori asahi

    IUCN IV

    National Wildlife Protection Area

    140.23 km² overlap

  • Tamugimata

    IUCN IV

    Prefectural Wildlife Protection Area

    59.03 km² overlap

  • Shonai kaihin

    IUCN V

    Prefectural Natural Park

    29.89 km² overlap

  • Mayasan

    IUCN IV

    Prefectural Wildlife Protection Area

    12.38 km² overlap

  • Chokai-Asahi and Iide-Azuma

    IUCN V

    Green Corridor

    6.49 km² overlap

  • Gassan

    IUCN IV

    Biocenosis Protected Forest

    6.36 km² overlap

  • Takadateyama

    IUCN IV

    Prefectural Wildlife Protection Area

    5.16 km² overlap

8 more protected areas

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

Species present

1 336 distinct species · 6 012 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 012 obs · 27 cellules
Obs. / cellule
≥ 1 386
541–1 385
167–540
111–166
< 111

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

Ecological tissue

Sample of 33 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 赤川 : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 54 interactions GloBI sur 3 types (connectance 9.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
54
Connectance
0.091
Patrimoniales
1
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°

9,6°C

Annual rain

1 931mm

Moisture idx (CMI)

0,56

Runoff

1 203mm/an

PET

853mm

AET

840mm

Mean slope

13,7°

Water table

413cm

Forest

65%

Crops

14%

Urban

8%

Protected

34%

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