Ontologia

HydroBASINS lev08 watershed · #4080044750

Bassin de 養老川

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 7 administrative regions : Chōnan, Ichihara, Kimitsu, Kisarazu, Nagara +2

6% lakePfafstetter: 41301718

Sub-basin area

285,6km²

Upstream area

285,8km²

Discharge

7,48m³/s

Mean elev.

87m

Administrative coverage

7 dept-equivalent regions (GADM L2)

17 intersecting protected areas

  • Kamo

    IUCN IV

    Prefectural Wildlife Protection Area

    11.40 km² overlap

  • Yamakura

    IUCN IV

    Prefectural Wildlife Protection Area

    5.36 km² overlap

  • Kasamori tsurumai

    IUCN V

    Prefectural Natural Park

    4.73 km² overlap

  • Yoro keikoku okukiyosumi

    IUCN V

    Prefectural Natural Park

    4.14 km² overlap

  • Nanso tsurumai

    IUCN IV

    Prefectural Wildlife Protection Area

    3.94 km² overlap

  • Umegase keikoku

    IUCN V

    Prefectural Nature Conservation Area

    3.48 km² overlap

  • Yamakura damu shuuhen

    IUCN V

    Green Space Environment Conservation Area(Chiba)

    1.04 km² overlap

  • Daifuku yama hokubu

    IUCN V

    Prefectural Nature Conservation Area

    0.95 km² overlap

  • Hiraoka

    IUCN IV

    Prefectural Wildlife Protection Area

    0.88 km² overlap

8 more protected areas

  • Tsukide

    IUCN IV

    Prefectural Wildlife Protection Area

    0.44 km² overlap

  • Kasamori

    IUCN IV

    Prefectural Wildlife Protection Area

    0.40 km² overlap

  • Uchida

    IUCN IV

    Prefectural Wildlife Protection Area

    0.22 km² overlap

  • Minamiboso

    IUCN V

    Quasi National Park

    0.10 km² overlap

  • Takataki jinja no mori

    IUCN V

    Local Environment Conservation Area(Chiba)

    0.04 km² overlap

  • Kiyosumiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    0.04 km² overlap

  • Kitsuzenji no mori

    IUCN V

    Local Environment Conservation Area(Chiba)

    0.03 km² overlap

  • Otaki

    IUCN IV

    Prefectural Wildlife Protection Area

    0.03 km² overlap

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

Species present

2 060 distinct species · 12 690 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

12 690 obs · 6 cellules
Obs. / cellule
≥ 2 846
2 846–2 845
2 786–2 845
2 770–2 785
< 2 770

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

Ecological tissue

Sample of 19 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 養老川 : 14 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 28 interactions GloBI sur 3 types (connectance 12.1%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
22
Interactions affichées
28
Connectance
0.121
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°

15,1°C

Annual rain

1 671mm

Moisture idx (CMI)

0,44

Runoff

784mm/an

PET

934mm

AET

931mm

Mean slope

4,4°

Water table

144cm

Forest

69%

Crops

31%

Urban

29%

Protected

12%

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