Ontologia

HydroBASINS lev08 watershed · #4080580750

Bassin de 荒川

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 12 administrative regions : Chichibu, Hannō, Higashichichibu, Kawakami, Kōshū +7

Pfafstetter: 41301729

Sub-basin area

552,9km²

Upstream area

553,1km²

Discharge

10,97m³/s

Mean elev.

983m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 荒川418 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

12 dept-equivalent regions (GADM L2)

4 more

27 intersecting protected areas

  • Chichibu tama kai

    IUCN V

    National Park

    331.36 km² overlap

  • Buko

    IUCN V

    Prefectural Natural Park

    151.52 km² overlap

  • Chichibu Mountains

    IUCN V

    Green Corridor

    62.47 km² overlap

  • Okuchichibu

    IUCN IV

    Prefectural Wildlife Protection Area

    62.16 km² overlap

  • Shiroishiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    33.09 km² overlap

  • Chichibusanchi

    IUCN IV

    Biocenosis Protected Forest

    20.84 km² overlap

  • Nagatoro tamayodo

    IUCN V

    Prefectural Natural Park

    13.21 km² overlap

  • Ryokamisan

    IUCN IV

    Prefectural Wildlife Protection Area

    11.34 km² overlap

  • Yadake

    IUCN IV

    Prefectural Wildlife Protection Area

    8.53 km² overlap

18 more protected areas

  • Nakatsugawa

    IUCN IV

    Prefectural Wildlife Protection Area

    3.61 km² overlap

  • Okumusashi

    IUCN V

    Prefectural Natural Park

    2.91 km² overlap

  • Naguri genki plaza

    IUCN IV

    Prefectural Wildlife Protection Area

    2.24 km² overlap

  • Ochigawa oku

    IUCN IV

    Prefectural Wildlife Protection Area

    1.96 km² overlap

  • Okutama

    IUCN IV

    Prefectural Wildlife Protection Area

    1.55 km² overlap

  • Dodairasan

    IUCN IV

    Prefectural Wildlife Protection Area

    1.17 km² overlap

  • Hitsujiyama koen

    IUCN IV

    Prefectural Wildlife Protection Area

    1.08 km² overlap

  • Chichibu renpo

    IUCN IV

    Prefectural Wildlife Protection Area

    0.83 km² overlap

  • Ryokami

    IUCN V

    Prefectural Natural Park

    0.77 km² overlap

  • Yokose

    IUCN IV

    Prefectural Wildlife Protection Area

    0.73 km² overlap

  • Okuhashidate

    IUCN IV

    Prefectural Wildlife Protection Area

    0.58 km² overlap

  • Kinpozan

    IUCN IV

    Prefectural Wildlife Protection Area

    0.33 km² overlap

  • Kuroyama

    IUCN V

    Prefectural Natural Park

    0.27 km² overlap

  • Ogano machi takimae

    IUCN V

    Prefectural Nature Conservation Area

    0.22 km² overlap

  • Takashino chugakko

    IUCN IV

    Prefectural Wildlife Protection Area

    0.15 km² overlap

  • Tenmaru yama

    IUCN V

    Prefectural Nature Conservation Area

    0.07 km² overlap

  • Temmaruyama Hinoki・Xxx

    IUCN IV

    Rare Population Protected Forest

    0.07 km² overlap

  • Nishi chichibu

    IUCN V

    Prefectural Natural Park

    0.06 km² overlap

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

Species present

3 755 distinct species · 34 886 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

34 886 obs · 19 cellules
Obs. / cellule
≥ 11 334
2 591–11 333
1 619–2 590
1 513–1 618
< 1 513

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

Ecological tissue

Sample of 37 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 荒川 : 31 espèces reliées par 37 interactions GloBI sur 5 types (connectance 5.3%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
37
Connectance
0.053
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°

9,2°C

Annual rain

1 543mm

Moisture idx (CMI)

0,37

Runoff

648mm/an

PET

928mm

AET

906mm

Mean slope

22,6°

Water table

680cm

Forest

86%

Crops

10%

Urban

8%

Protected

91%

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