Ontologia

HydroBASINS lev08 watershed · #4080582850

Bassin de 小貝川

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 17 administrative regions : Chikusei, Haga, Ichikai, Jōsō, Kaminokawa +12

Pfafstetter: 41301642

Sub-basin area

729km²

Upstream area

729km²

Discharge

13,25m³/s

Mean elev.

86m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 西浦川99 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

17 dept-equivalent regions (GADM L2)

9 more

16 intersecting protected areas

  • Mashiko

    IUCN V

    Prefectural Natural Park

    13.20 km² overlap

  • Shimotsuma

    IUCN IV

    Prefectural Wildlife Protection Area

    7.36 km² overlap

  • Igashira koen

    IUCN IV

    Prefectural Wildlife Protection Area

    4.03 km² overlap

  • Takanezawa

    IUCN IV

    Prefectural Wildlife Protection Area

    2.91 km² overlap

  • Nemotoyama

    IUCN IV

    Prefectural Wildlife Protection Area

    1.98 km² overlap

  • Kokai shogakko

    IUCN IV

    Prefectural Wildlife Protection Area

    1.95 km² overlap

  • Kokaigawa fureai koen

    IUCN IV

    Prefectural Wildlife Protection Area

    1.34 km² overlap

  • Oguri

    IUCN IV

    Prefectural Wildlife Protection Area

    0.51 km² overlap

  • Kokaichuo shogakko

    IUCN IV

    Prefectural Wildlife Protection Area

    0.31 km² overlap

7 more protected areas

  • Tatara numa

    IUCN V

    Prefectural Nature Conservation Area

    0.25 km² overlap

  • Nemotoyama

    IUCN V

    Green Space Environment Conservation Area(Tochigi)

    0.24 km² overlap

  • Takadateyama

    IUCN IV

    Prefectural Wildlife Protection Area

    0.15 km² overlap

  • Kasama

    IUCN V

    Prefectural Natural Park

    0.11 km² overlap

  • Jouchinji

    IUCN V

    Green Space Environment Conservation Area(Tochigi)

    0.04 km² overlap

  • Ouchi higashi shogakko

    IUCN IV

    Prefectural Wildlife Protection Area

    0.04 km² overlap

  • Sakuraminami shogakko

    IUCN IV

    Prefectural Wildlife Protection Area

    0.01 km² overlap

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

Species present

1 505 distinct species · 11 839 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

11 839 obs · 21 cellules
Obs. / cellule
≥ 5 900
603–5 899
331–602
261–330
< 261

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

Ecological tissue

Sample of 29 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 小貝川 : 22 espèces reliées par 55 interactions GloBI sur 4 types (connectance 11.1%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
55
Connectance
0.111
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°

13,6°C

Annual rain

1 371mm

Moisture idx (CMI)

0,25

Runoff

590mm/an

PET

1 032mm

AET

1 008mm

Mean slope

1,6°

Water table

56cm

Forest

15%

Crops

42%

Urban

46%

Protected

5%

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