Ontologia

HydroBASINS lev08 watershed · #4080577650

Bassin de 利根川

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 29 administrative regions : Chiyoda, Fujimi, Fukaya, Gyōda, Hanyū +24

Pfafstetter: 41301670

Sub-basin area

1 169km²

Upstream area

6 348,9km²

Discharge

90,67m³/s

Mean elev.

106m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 利根川585 km²

▲ Receives from 2 basins

29 dept-equivalent regions (GADM L2)

21 more

25 intersecting protected areas

  • Jobu

    IUCN V

    Prefectural Natural Park

    24.76 km² overlap

  • Akihara

    IUCN IV

    Prefectural Wildlife Protection Area

    6.36 km² overlap

  • Kanayama

    IUCN IV

    Prefectural Wildlife Protection Area

    3.30 km² overlap

  • Akagiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    2.45 km² overlap

  • Higashiokawara

    IUCN IV

    Prefectural Wildlife Protection Area

    2.14 km² overlap

  • Nagatoro tamayodo

    IUCN V

    Prefectural Natural Park

    1.99 km² overlap

  • Tatebayashi

    IUCN IV

    Prefectural Wildlife Protection Area

    1.97 km² overlap

  • Misato

    IUCN IV

    Prefectural Wildlife Protection Area

    1.72 km² overlap

  • Nabewari san nanmen

    IUCN V

    Prefectural Nature Conservation Area

    1.36 km² overlap

16 more protected areas

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

Species present

2 965 distinct species · 17 406 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

17 406 obs · 36 cellules
Obs. / cellule
≥ 1 976
944–1 975
606–943
378–605
< 378

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

Ecological tissue

Sample of 36 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 利根川 : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 77 interactions GloBI sur 6 types (connectance 10.4%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
77
Connectance
0.104
Patrimoniales
1
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°

14,1°C

Annual rain

1 292mm

Moisture idx (CMI)

0,18

Runoff

476mm/an

PET

1 055mm

AET

970mm

Mean slope

1,6°

Water table

48cm

Forest

8%

Crops

6%

Urban

84%

Protected

4%

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