Ontologia

HydroBASINS lev08 watershed · #4080541050

Bassin de 千曲川

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 26 administrative regions : Iiyama, Iizuna, Jōetsu, Kawaguchi, Kijimadaira +21

Pfafstetter: 41301250

Sub-basin area

2 351,2km²

Upstream area

8 213,6km²

Discharge

332,06m³/s

Mean elev.

865m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 信濃川152 km²

▲ Receives from 2 basins

26 dept-equivalent regions (GADM L2)

18 more

30 intersecting protected areas

  • Joshinetsukogen

    IUCN II

    National Park

    681.38 km² overlap

  • Shiga Highland

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    146.49 km² overlap

  • Saburyuyama Shuhen

    IUCN Ib

    Forest Ecosystem Reserve

    125.47 km² overlap

  • Azuma

    IUCN IV

    Prefectural Wildlife Protection Area

    57.21 km² overlap

  • Myokotogakushirenzan

    IUCN II

    National Park

    50.85 km² overlap

  • Takai

    IUCN IV

    Prefectural Wildlife Protection Area

    46.97 km² overlap

  • Saburuyama

    IUCN IV

    Prefectural Wildlife Protection Area

    43.53 km² overlap

  • Naebasan

    IUCN IV

    Prefectural Wildlife Protection Area

    39.17 km² overlap

  • Shiga kogen

    IUCN IV

    Prefectural Wildlife Protection Area

    33.86 km² overlap

21 more protected areas

  • Togakushiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    30.86 km² overlap

  • Mikuni Line

    IUCN V

    Green Corridor

    15.34 km² overlap

  • Nagamine

    IUCN IV

    Prefectural Wildlife Protection Area

    15.11 km² overlap

  • Komatsubara Shitsugen

    IUCN IV

    Biocenosis Protected Forest

    14.73 km² overlap

  • Kayanotairato

    IUCN IV

    Biocenosis Protected Forest

    14.01 km² overlap

  • Kiyotsukyo

    IUCN IV

    Prefectural Wildlife Protection Area

    13.77 km² overlap

  • Naebayama Shitsugen

    IUCN IV

    Biocenosis Protected Forest

    13.32 km² overlap

  • Yakebitai

    IUCN IV

    Prefectural Wildlife Protection Area

    13.19 km² overlap

  • Nozori

    IUCN IV

    Prefectural Wildlife Protection Area

    12.37 km² overlap

  • Yonago

    IUCN IV

    Rare Population Protected Forest

    11.25 km² overlap

  • Minakami

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    10.47 km² overlap

  • Datehada

    IUCN IV

    Prefectural Wildlife Protection Area

    8.74 km² overlap

  • Annandaira

    IUCN IV

    Prefectural Wildlife Protection Area

    8.08 km² overlap

  • Torikabuto yama

    IUCN V

    Prefectural Nature Conservation Area

    5.75 km² overlap

  • Jigokudani

    IUCN IV

    Prefectural Wildlife Protection Area

    5.70 km² overlap

  • Naebasan

    IUCN IV

    Prefectural Wildlife Protection Area

    5.43 km² overlap

  • Kosugeyama

    IUCN V

    Local Environment Conservation Area(Nagano)

    5.09 km² overlap

  • Nojiri

    IUCN IV

    Prefectural Wildlife Protection Area

    5.01 km² overlap

  • Koshasan

    IUCN IV

    Prefectural Wildlife Protection Area

    4.26 km² overlap

  • Ryugakubo

    IUCN IV

    Prefectural Wildlife Protection Area

    4.05 km² overlap

  • Hokuryuko

    IUCN IV

    Prefectural Wildlife Protection Area

    3.67 km² overlap

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

Species present

4 030 distinct species · 81 330 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

81 330 obs · 71 cellules
Obs. / cellule
≥ 17 314
2 544–17 313
698–2 543
379–697
< 379

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 千曲川 : 19 espèces reliées par 45 interactions GloBI sur 4 types (connectance 11.1%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
45
Connectance
0.111
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°

8,9°C

Annual rain

1 657mm

Moisture idx (CMI)

0,45

Runoff

1 377mm/an

PET

884mm

AET

855mm

Mean slope

14,0°

Water table

427cm

Forest

72%

Crops

14%

Urban

11%

Protected

35%

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