Ontologia

HydroBASINS lev08 watershed · #4080553040

Bassin de 黒川

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 6 administrative regions : Nasu, Nasushiobara, Nishigou, Otawara, Shirakawa +1

Pfafstetter: 41301588

Sub-basin area

314,2km²

Upstream area

314,3km²

Discharge

7,74m³/s

Mean elev.

465m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de 那珂川202 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

6 dept-equivalent regions (GADM L2)

12 intersecting protected areas

  • Nasu miyma

    IUCN IV

    Prefectural Wildlife Protection Area

    31.70 km² overlap

  • Nikko

    IUCN V

    National Park

    22.84 km² overlap

  • Yamizo

    IUCN V

    Prefectural Natural Park

    15.52 km² overlap

  • Yamizo

    IUCN IV

    Prefectural Wildlife Protection Area

    5.78 km² overlap

  • Nishigo

    IUCN IV

    Prefectural Wildlife Protection Area

    5.26 km² overlap

  • Nikko and Azuma Mountains

    IUCN V

    Green Corridor

    5.22 km² overlap

  • Yanome dam

    IUCN IV

    Prefectural Wildlife Protection Area

    4.54 km² overlap

  • Ashino-iono

    IUCN IV

    Prefectural Wildlife Protection Area

    3.01 km² overlap

  • Chifuriko

    IUCN IV

    Prefectural Wildlife Protection Area

    2.30 km² overlap

3 more protected areas

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

Species present

499 distinct species · 1 067 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 067 obs · 8 cellules
Obs. / cellule
≥ 247
247–246
159–246
151–158
< 151

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

Ecological tissue

Sample of 33 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 黒川 : 28 espèces reliées par 43 interactions GloBI sur 4 types (connectance 7.2%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
43
Connectance
0.072
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°

10,7°C

Annual rain

1 468mm

Moisture idx (CMI)

0,36

Runoff

775mm/an

PET

936mm

AET

924mm

Mean slope

5,8°

Water table

161cm

Forest

74%

Crops

17%

Urban

2%

Protected

22%

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