Quasi National Park · jpn
Sado-Yahiko-Yoneyama
- Area
- 470 km²
- IUCN cat.
- V
- Year
- 1950
Overview
- Designation
- Quasi National Park
- IUCN category
- V · Paysage protégé
Paysage façonné par l'humain digne de conservation
- Established
- 1950
- Managing authority
- Niigata Prefecture
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
725 distinct species · 1 834 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 37 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).
Indicateurs du tissu écologique
Tissu écologique de Sado-Yahiko-Yoneyama : 30 espèces reliées par 50 interactions GloBI sur 5 types (connectance 7.5%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology4 basins · 3 lakes · 41 rivers
Hydrology metrics for this exact territory
Stream length here
48,6km
Lake surface here
5,12km²
Basins crossed
4
Max stream order
6
Max drainage
10 579km²
Discharge in basins
23,3m³/s
Mean precip.
1 926mm/an
Mean T°
11,9°C
Moisture idx
0,55
Max snow
20%
Mean runoff
1 308mm/an
Mean elev. (basins)
202m
Watersheds crossing here
Lakes (3, top by area)
Rivers / streams (41, ord ≥ 4)
- 大河津分水路ord 6len here6.02 km66%total9 km
- 早向川ord 6len here5.02 km100%total5 km
- 谷根川ord 2len here3.51 km42%total8 km
- 天王川ord 1len here3.27 km94%total3 km
- 梅津川ord 2len here2.46 km39%total6 km
- 新保川ord 1len here2.10 km23%total9 km
- 入川ord 1len here2.09 km32%total7 km
- 戸地川ord 2len here1.87 km35%total5 km
- 大川ord 1len here1.72 km100%total2 km
- 長江川ord 1len here1.50 km26%total6 km
- 大ザレ川ord 1len here1.50 km100%total2 km
- 大野川ord 1len here1.47 km100%total1 km
29 more river segmentssorted by Strahler order + length
- ブイガ沢ord 1len here1.28 km100%total1 km
- 小股沢ord 1len here1.14 km100%total1 km
- 石花川ord 2len here1.10 km24%total5 km
- 石田川ord 1len here1.04 km26%total4 km
- 関川ord 1len here1.04 km53%total2 km
- 白瀬川ord 1len here1.03 km31%total3 km
- 黒姫川ord 1len here0.97 km85%total1 km
- 馬首川ord 2len here0.95 km19%total5 km
- 大山川ord 1len here0.91 km100%total1 km
- 釜川ord 1len here0.91 km100%total1 km
- 古川ord 1len here0.88 km100%total1 km
- 稲葉川ord 1len here0.86 km25%total3 km
- 国府川ord 3len here0.66 km3%total20 km
- 西川ord 2len here0.44 km6%total8 km
- 五十浦川ord 1len here0.41 km32%total1 km
- 矢柄川ord 1len here0.37 km10%total4 km
- 山田川ord 1len here0.37 km8%total5 km
- 石名川ord 1len here0.35 km10%total3 km
- 達者川ord 1len here0.28 km17%total2 km
- 北狄川ord 1len here0.24 km16%total2 km
- 大倉川ord 1len here0.22 km6%total3 km
- 大通川放水路ord 3len here0.15 km1%total21 km
- 払川ord 1len here0.12 km3%total4 km
- 矢川ord 3len here0.10 km1%total8 km
- 小野見川ord 1len here0.10 km3%total4 km
- 椿川ord 1len here0.08 km3%total2 km
- 前川ord 1len here0.07 km3%total3 km
- 質場川ord 1len here0.02 km3%total1 km
- 歌見川ord 1len here≈ tangenttotal1 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 38.17882, 138.40879
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.