Ontologia

HydroBASINS lev08 watershed · #4080572040

Bassin de 涸沼川

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 11 administrative regions : Hokota, Ibaraki, Ishioka, Kasama, Mito +6

20% lakePfafstetter: 41301582

Sub-basin area

473,4km²

Upstream area

473,4km²

Discharge

9,97m³/s

Mean elev.

63m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 那珂川1 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

11 dept-equivalent regions (GADM L2)

3 more

16 intersecting protected areas

  • Kasama

    IUCN V

    Prefectural Natural Park

    24.94 km² overlap

  • Agakuni atago

    IUCN V

    Prefectural Natural Park

    24.67 km² overlap

  • Hinuma

    IUCN IV

    National Wildlife Protection Area

    20.95 km² overlap

  • Oarai

    IUCN V

    Prefectural Natural Park

    18.74 km² overlap

  • Hinuma

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    9.54 km² overlap

  • Tomobe

    IUCN IV

    Prefectural Wildlife Protection Area

    7.26 km² overlap

  • Sashiroyama

    IUCN IV

    Prefectural Wildlife Protection Area

    5.83 km² overlap

  • Uchihara

    IUCN IV

    Prefectural Wildlife Protection Area

    5.50 km² overlap

  • Atagoyama

    IUCN IV

    Prefectural Wildlife Protection Area

    4.11 km² overlap

7 more protected areas

  • Kasamako

    IUCN IV

    Prefectural Wildlife Protection Area

    1.65 km² overlap

  • Mashiko

    IUCN V

    Prefectural Natural Park

    0.21 km² overlap

  • Obata jouato

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.07 km² overlap

  • Konaji

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.04 km² overlap

  • Inada

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.03 km² overlap

  • Noguchi ike

    IUCN V

    Prefectural Nature Conservation Area

    0.03 km² overlap

  • Yazure

    IUCN V

    Green Space Environment Conservation Area(Ibaraki)

    0.02 km² overlap

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

Species present

1 979 distinct species · 8 619 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

8 619 obs · 15 cellules
Obs. / cellule
≥ 1 922
1 612–1 921
574–1 611
297–573
< 297

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

Ecological tissue

Sample of 32 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 涸沼川 : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 3 types (connectance 13.0%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
73
Connectance
0.130
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°

13,5°C

Annual rain

1 383mm

Moisture idx (CMI)

0,27

Runoff

660mm/an

PET

1 003mm

AET

991mm

Mean slope

3,1°

Water table

113cm

Forest

28%

Crops

38%

Urban

34%

Protected

19%

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