Ontologia

HydroBASINS lev08 watershed · #4080585030

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 7 administrative regions : Ageo, Kawagoe, Kawajima, Kitamoto, Kōnosu +2

Pfafstetter: 41301725

Sub-basin area

42,4km²

Upstream area

1 705,6km²

Discharge

29,48m³/s

Mean elev.

17m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 荒川795 km²

▲ Receives from 2 basins

7 dept-equivalent regions (GADM L2)

2 intersecting protected areas

  • Kitamoto

    IUCN IV

    Prefectural Wildlife Protection Area

    3.03 km² overlap

  • Ageo

    IUCN IV

    Prefectural Wildlife Protection Area

    0.10 km² overlap

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

Species present

1 390 distinct species · 16 264 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

16 264 obs · 2 cellules
Obs. / cellule
≥ 12 621
12 621–12 620
12 621–12 620
12 621–12 620
< 12 621

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

Ecological tissue

Sample of 34 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 : 23 espèces reliées par 68 interactions GloBI sur 4 types (connectance 10.2%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
68
Connectance
0.102
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°

14,7°C

Annual rain

1 377mm

Moisture idx (CMI)

0,24

Runoff

583mm/an

PET

1 044mm

AET

1 015mm

Mean slope

0,4°

Water table

17cm

Forest

0%

Crops

2%

Urban

95%

Protected

8%

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