Ontologia

HydroBASINS lev08 watershed · #4080583020

Bassin de 山川

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 10 administrative regions : Bandō, Chikusei, Jōsō, Koga, Moriya +5

2% lakePfafstetter: 41301643

Sub-basin area

349km²

Upstream area

1 998,8km²

Discharge

38,51m³/s

Mean elev.

25m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 西浦川99 km²

▲ Receives from 2 basins

10 dept-equivalent regions (GADM L2)

2 more

10 intersecting protected areas

  • Shimotsuma

    IUCN IV

    Prefectural Wildlife Protection Area

    20.62 km² overlap

  • Yachiyo

    IUCN IV

    Prefectural Wildlife Protection Area

    4.86 km² overlap

  • Sanwa

    IUCN IV

    Prefectural Wildlife Protection Area

    3.10 km² overlap

  • Sakaijoato koen

    IUCN IV

    Prefectural Wildlife Protection Area

    1.40 km² overlap

  • Oyama

    IUCN IV

    Prefectural Wildlife Protection Area

    0.09 km² overlap

  • Sakasai jouseki

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.03 km² overlap

  • Ikoi-no-mori Forest Hachigata

    IUCN Not Applicable

    OECM

    0.02 km² overlap

  • Notsume

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.01 km² overlap

  • Oonogou

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.01 km² overlap

1 more protected areas

  • Higashifukita

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.01 km² overlap

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

Species present

1 444 distinct species · 4 462 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 462 obs · 10 cellules
Obs. / cellule
≥ 2 804
2 804–2 803
357–2 803
153–356
< 153

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

Ecological tissue

Sample of 35 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 山川 : 26 espèces reliées par 67 interactions GloBI sur 6 types (connectance 10.6%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
67
Connectance
0.106
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°

14,2°C

Annual rain

1 315mm

Moisture idx (CMI)

0,20

Runoff

516mm/an

PET

1 046mm

AET

1 002mm

Mean slope

0,6°

Water table

15cm

Forest

0%

Crops

6%

Urban

82%

Protected

9%

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