Ontologia

HydroBASINS lev08 watershed · #4080591120

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 41 administrative regions : Adachi, Ageo, Arakawa, Asaka, Bunkyō +36

4% lakePfafstetter: 41301723

Sub-basin area

795,3km²

Upstream area

2 815,9km²

Discharge

55,17m³/s

Mean elev.

36m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 中川6 km²

▲ Receives from 2 basins

41 dept-equivalent regions (GADM L2)

33 more

30 intersecting protected areas

  • Arakawa nannbu

    IUCN IV

    Prefectural Wildlife Protection Area

    20.14 km² overlap

  • Sayama (saitama)

    IUCN V

    Prefectural Natural Park

    19.46 km² overlap

  • Higashi iruma

    IUCN IV

    Prefectural Wildlife Protection Area

    15.14 km² overlap

  • Angyo bunan

    IUCN V

    Prefectural Natural Park

    8.36 km² overlap

  • Kawaguchi

    IUCN IV

    Prefectural Wildlife Protection Area

    7.00 km² overlap

  • Sayamako

    IUCN IV

    Prefectural Wildlife Protection Area

    6.94 km² overlap

  • Niiza

    IUCN IV

    Prefectural Wildlife Protection Area

    6.60 km² overlap

  • Sayama (tokyo)

    IUCN V

    Prefectural Natural Park

    5.60 km² overlap

  • Murayamayamaguchi

    IUCN IV

    Prefectural Wildlife Protection Area

    4.08 km² overlap

21 more protected areas

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

Species present

3 750 distinct species · 141 650 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

141 650 obs · 24 cellules
Obs. / cellule
≥ 42 705
9 040–42 704
5 165–9 039
4 524–5 164
< 4 524

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 荒川 : 26 espèces reliées par 54 interactions GloBI sur 5 types (connectance 8.1%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
54
Connectance
0.081
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°

14,9°C

Annual rain

1 438mm

Moisture idx (CMI)

0,29

Runoff

679mm/an

PET

1 021mm

AET

1 011mm

Mean slope

0,7°

Water table

19cm

Forest

1%

Crops

1%

Urban

100%

Protected

10%

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