Ontologia

HydroBASINS lev08 watershed · #4080044860

Bassin de 多摩川

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 39 administrative regions : Akiruno, Akishima, Chichibu, Chōfu, Fuchū +34

3% lakePfafstetter: 41301732

Sub-basin area

1 253,1km²

Upstream area

1 253,1km²

Discharge

31,1m³/s

Mean elev.

523m

Administrative coverage

39 dept-equivalent regions (GADM L2)

31 more

30 intersecting protected areas

  • Chichibu tama kai

    IUCN V

    National Park

    533.01 km² overlap

  • Tamagawa

    IUCN IV

    Prefectural Wildlife Protection Area

    48.81 km² overlap

  • Takao jinba

    IUCN V

    Prefectural Natural Park

    43.42 km² overlap

  • Takao

    IUCN IV

    Prefectural Wildlife Protection Area

    43.07 km² overlap

  • Chichibu renpo

    IUCN IV

    Prefectural Wildlife Protection Area

    27.10 km² overlap

  • Mitake

    IUCN IV

    Prefectural Wildlife Protection Area

    26.55 km² overlap

  • Okutama

    IUCN IV

    Prefectural Wildlife Protection Area

    24.05 km² overlap

  • Akigawa kyuryo

    IUCN IV

    Prefectural Wildlife Protection Area

    22.77 km² overlap

  • Tama kyuryo

    IUCN V

    Prefectural Natural Park

    20.24 km² overlap

21 more protected areas

  • Setagaya

    IUCN IV

    Prefectural Wildlife Protection Area

    19.17 km² overlap

  • Akikawa kyuryo

    IUCN V

    Prefectural Natural Park

    14.09 km² overlap

  • Meiji no Mori Takao

    IUCN V

    Quasi National Park

    6.97 km² overlap

  • Takiyama

    IUCN V

    Prefectural Natural Park

    6.81 km² overlap

  • Okutamako

    IUCN IV

    Prefectural Wildlife Protection Area

    6.77 km² overlap

  • Hamura kusabana kyuryo

    IUCN V

    Prefectural Natural Park

    5.36 km² overlap

  • Tamagawa

    IUCN IV

    Prefectural Wildlife Protection Area

    5.17 km² overlap

  • Nanao

    IUCN IV

    Prefectural Wildlife Protection Area

    3.81 km² overlap

  • Okutama tominno mori

    IUCN IV

    Prefectural Wildlife Protection Area

    3.55 km² overlap

  • Mitosan

    IUCN IV

    Prefectural Wildlife Protection Area

    2.67 km² overlap

  • Hinohara nanbu

    IUCN V

    Prefectural Nature Conservation Area

    2.59 km² overlap

  • Ome

    IUCN IV

    Prefectural Wildlife Protection Area

    2.58 km² overlap

  • Sayama (tokyo)

    IUCN V

    Prefectural Natural Park

    1.80 km² overlap

  • Itsukaichi

    IUCN IV

    Prefectural Wildlife Protection Area

    1.75 km² overlap

  • Ikuta ryokuchi

    IUCN IV

    Prefectural Wildlife Protection Area

    1.64 km² overlap

  • Yamano furusato mura

    IUCN IV

    Prefectural Wildlife Protection Area

    1.62 km² overlap

  • Chofushi jindaiji

    IUCN IV

    Prefectural Wildlife Protection Area

    1.43 km² overlap

  • Okuchichibu

    IUCN IV

    Prefectural Wildlife Protection Area

    1.02 km² overlap

  • Buko

    IUCN V

    Prefectural Natural Park

    0.82 km² overlap

  • Chichibu Mountains

    IUCN V

    Green Corridor

    0.77 km² overlap

  • Sayamako

    IUCN IV

    Prefectural Wildlife Protection Area

    0.72 km² overlap

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

Species present

6 725 distinct species · 315 032 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

315 032 obs · 35 cellules
Obs. / cellule
≥ 83 505
20 384–83 504
5 794–20 383
2 245–5 793
< 2 245

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

Ecological tissue

Sample of 40 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 多摩川 : 31 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 65 interactions GloBI sur 4 types (connectance 7.9%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
65
Connectance
0.079
Patrimoniales
2
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°

12,1°C

Annual rain

1 547mm

Moisture idx (CMI)

0,36

Runoff

750mm/an

PET

981mm

AET

976mm

Mean slope

13,0°

Water table

400cm

Forest

57%

Crops

5%

Urban

46%

Protected

57%

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