Ontologia

HydroBASINS lev08 watershed · #4080573750

Bassin de 神流川

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 27 administrative regions : Annaka, Chichibu, Fujioka, Higashiagatsuma, Kamikawa +22

2% lakePfafstetter: 41301680

Sub-basin area

1 783,5km²

Upstream area

1 783,5km²

Discharge

14,19m³/s

Mean elev.

582m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 利根川1169 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

27 dept-equivalent regions (GADM L2)

19 more

30 intersecting protected areas

  • Myogi-Arafune-Sakukogen

    IUCN V

    Quasi National Park

    103.47 km² overlap

  • Jobu

    IUCN V

    Prefectural Natural Park

    37.12 km² overlap

  • Joshinetsukogen

    IUCN II

    National Park

    33.61 km² overlap

  • Hanamagariyama

    IUCN IV

    Prefectural Wildlife Protection Area

    29.95 km² overlap

  • Myogi

    IUCN IV

    Prefectural Wildlife Protection Area

    20.57 km² overlap

  • Usuiko

    IUCN IV

    Prefectural Wildlife Protection Area

    15.01 km² overlap

  • Kitazawa

    IUCN IV

    Prefectural Wildlife Protection Area

    14.59 km² overlap

  • Harunasan

    IUCN IV

    Prefectural Wildlife Protection Area

    11.41 km² overlap

  • Misato

    IUCN IV

    Prefectural Wildlife Protection Area

    10.38 km² overlap

21 more protected areas

  • Akihata

    IUCN IV

    Prefectural Wildlife Protection Area

    7.08 km² overlap

  • Oshio

    IUCN IV

    Prefectural Wildlife Protection Area

    6.03 km² overlap

  • Oneyama

    IUCN IV

    Prefectural Wildlife Protection Area

    5.92 km² overlap

  • Oketayama

    IUCN IV

    Prefectural Wildlife Protection Area

    4.32 km² overlap

  • Kannnonyama

    IUCN IV

    Prefectural Wildlife Protection Area

    4.28 km² overlap

  • Sannako

    IUCN IV

    Prefectural Wildlife Protection Area

    3.63 km² overlap

  • Kozu

    IUCN IV

    Prefectural Wildlife Protection Area

    3.58 km² overlap

  • Kanoyama

    IUCN IV

    Prefectural Wildlife Protection Area

    3.44 km² overlap

  • Kannako

    IUCN IV

    Prefectural Wildlife Protection Area

    3.07 km² overlap

  • Kannako

    IUCN IV

    Prefectural Wildlife Protection Area

    2.99 km² overlap

  • Uenonarahara Shiojito

    IUCN IV

    Biocenosis Protected Forest

    2.98 km² overlap

  • Kamikawa

    IUCN IV

    Prefectural Wildlife Protection Area

    2.90 km² overlap

  • Kitazawa

    IUCN V

    Prefectural Nature Conservation Area

    2.57 km² overlap

  • Shorinzan

    IUCN IV

    Prefectural Wildlife Protection Area

    2.50 km² overlap

  • Mikabo shinrin koen

    IUCN IV

    Prefectural Wildlife Protection Area

    2.44 km² overlap

  • Iwahana

    IUCN IV

    Prefectural Wildlife Protection Area

    2.18 km² overlap

  • Asama

    IUCN IV

    National Wildlife Protection Area

    1.55 km² overlap

  • Hino

    IUCN IV

    Prefectural Wildlife Protection Area

    1.55 km² overlap

  • Nishi chichibu

    IUCN V

    Prefectural Natural Park

    1.41 km² overlap

  • Temmaruyama Hinoki・Xxx

    IUCN IV

    Rare Population Protected Forest

    1.11 km² overlap

  • Tenmaru yama

    IUCN V

    Prefectural Nature Conservation Area

    1.10 km² overlap

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

Species present

3 908 distinct species · 34 958 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

34 958 obs · 55 cellules
Obs. / cellule
≥ 2 346
1 609–2 345
700–1 608
476–699
< 476

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 神流川 : 28 espèces reliées par 44 interactions GloBI sur 4 types (connectance 6.6%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
44
Connectance
0.066
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°

11,3°C

Annual rain

1 259mm

Moisture idx (CMI)

0,19

Runoff

574mm/an

PET

1 002mm

AET

930mm

Mean slope

13,2°

Water table

451cm

Forest

73%

Crops

8%

Urban

20%

Protected

18%

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