Ontologia

HydroBASINS lev08 watershed · #4080044490

Bassin de 久慈川

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 16 administrative regions : Asakawa, Daigo, Hanawa, Hitachi, Hitachiōmiya +11

Pfafstetter: 41301560

Sub-basin area

1 481,1km²

Upstream area

1 481,1km²

Discharge

33,97m³/s

Mean elev.

319m

Administrative coverage

16 dept-equivalent regions (GADM L2)

8 more

30 intersecting protected areas

  • Okukuji (ibaraki)

    IUCN V

    Prefectural Natural Park

    110.45 km² overlap

  • Okukuji (fukushima)

    IUCN V

    Prefectural Natural Park

    48.63 km² overlap

  • Hanazono hananuki

    IUCN V

    Prefectural Natural Park

    42.35 km² overlap

  • Ota

    IUCN V

    Prefectural Natural Park

    27.78 km² overlap

  • Otanishiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    15.12 km² overlap

  • Takasuzu

    IUCN V

    Prefectural Natural Park

    10.76 km² overlap

  • Omiya

    IUCN IV

    Prefectural Wildlife Protection Area

    8.34 km² overlap

  • Daigochuo

    IUCN IV

    Prefectural Wildlife Protection Area

    5.53 km² overlap

  • Tanagura

    IUCN IV

    Prefectural Wildlife Protection Area

    5.40 km² overlap

21 more protected areas

  • Yamamoto

    IUCN IV

    Prefectural Wildlife Protection Area

    5.05 km² overlap

  • Takashiba

    IUCN IV

    Prefectural Wildlife Protection Area

    4.83 km² overlap

  • Ozato

    IUCN IV

    Prefectural Wildlife Protection Area

    4.69 km² overlap

  • Yamatsuriyama

    IUCN IV

    Prefectural Wildlife Protection Area

    4.03 km² overlap

  • Naka

    IUCN IV

    Prefectural Wildlife Protection Area

    3.82 km² overlap

  • Yamizo

    IUCN IV

    Prefectural Wildlife Protection Area

    3.58 km² overlap

  • Hanawa

    IUCN IV

    Prefectural Wildlife Protection Area

    3.44 km² overlap

  • Onaka

    IUCN IV

    Prefectural Wildlife Protection Area

    3.31 km² overlap

  • Osuga

    IUCN IV

    Prefectural Wildlife Protection Area

    3.27 km² overlap

  • Ryujin kyo

    IUCN IV

    Prefectural Wildlife Protection Area

    2.89 km² overlap

  • Fukuroda

    IUCN IV

    Prefectural Wildlife Protection Area

    2.78 km² overlap

  • Takasuzu

    IUCN IV

    Prefectural Wildlife Protection Area

    2.53 km² overlap

  • Goridaira

    IUCN IV

    Prefectural Wildlife Protection Area

    1.81 km² overlap

  • Machitsuki

    IUCN IV

    Prefectural Wildlife Protection Area

    1.76 km² overlap

  • Hozaka

    IUCN IV

    Prefectural Wildlife Protection Area

    1.53 km² overlap

  • Oyasawa

    IUCN IV

    Prefectural Wildlife Protection Area

    1.30 km² overlap

  • Ganma field

    IUCN IV

    Prefectural Wildlife Protection Area

    1.12 km² overlap

  • Nabeashi san

    IUCN V

    Prefectural Nature Conservation Area

    0.52 km² overlap

  • Tateyama(yamatsuri)

    IUCN IV

    Prefectural Wildlife Protection Area

    0.52 km² overlap

  • Yamizosan

    IUCN IV

    Prefectural Wildlife Protection Area

    0.51 km² overlap

  • Tokai

    IUCN IV

    Prefectural Wildlife Protection Area

    0.46 km² overlap

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

Species present

3 145 distinct species · 24 432 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

24 432 obs · 46 cellules
Obs. / cellule
≥ 8 633
986–8 632
398–985
164–397
< 164

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

Ecological tissue

Sample of 30 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 久慈川 : 22 espèces reliées par 35 interactions GloBI sur 4 types (connectance 7.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
35
Connectance
0.075
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°

11,9°C

Annual rain

1 482mm

Moisture idx (CMI)

0,36

Runoff

717mm/an

PET

942mm

AET

940mm

Mean slope

8,7°

Water table

314cm

Forest

80%

Crops

8%

Urban

10%

Protected

20%

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