Ontologia

HydroBASINS lev08 watershed · #4080044660

Bassin de 夷隅川

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 8 administrative regions : Chōnan, Ichihara, Ichinomiya, Isumi, Katsuura +3

Pfafstetter: 41301714

Sub-basin area

280km²

Upstream area

280km²

Discharge

8,05m³/s

Mean elev.

84m

Administrative coverage

8 dept-equivalent regions (GADM L2)

11 intersecting protected areas

  • Fusano

    IUCN IV

    Prefectural Wildlife Protection Area

    19.90 km² overlap

  • Otaki

    IUCN IV

    Prefectural Wildlife Protection Area

    11.05 km² overlap

  • Kuniyoshi

    IUCN IV

    Prefectural Wildlife Protection Area

    8.19 km² overlap

  • Isumi

    IUCN IV

    Prefectural Wildlife Protection Area

    5.60 km² overlap

  • Shiikizeki-nakaharazeki

    IUCN IV

    Prefectural Wildlife Protection Area

    3.33 km² overlap

  • Amatsu

    IUCN IV

    Prefectural Wildlife Protection Area

    0.89 km² overlap

  • Kujukuri

    IUCN V

    Prefectural Natural Park

    0.73 km² overlap

  • Mangi jouato

    IUCN V

    Local Environment Conservation Area(Chiba)

    0.41 km² overlap

  • Ogakeike

    IUCN IV

    Prefectural Wildlife Protection Area

    0.35 km² overlap

2 more protected areas

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

Species present

1 053 distinct species · 4 607 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 607 obs · 9 cellules
Obs. / cellule
≥ 1 217
1 217–1 216
1 014–1 216
278–1 013
< 278

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

Ecological tissue

Sample of 28 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 夷隅川 : 26 espèces reliées par 35 interactions GloBI sur 3 types (connectance 7.1%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
35
Connectance
0.071
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°

15,0°C

Annual rain

1 838mm

Moisture idx (CMI)

0,50

Runoff

838mm/an

PET

914mm

AET

914mm

Mean slope

4,9°

Water table

156cm

Forest

89%

Crops

30%

Urban

6%

Protected

18%

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