Prefectural Natural Park · jpn
Okukuji (ibaraki)
- Area
- 111 km²
- IUCN cat.
- V
- Year
- 1953
Overview
- Designation
- Prefectural Natural Park
- IUCN category
- V · Paysage protégé
Paysage façonné par l'humain digne de conservation
- Established
- 1953
- Managing authority
- Ibaraki Prefecture
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
245 distinct species · 1 076 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 30 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 Okukuji (ibaraki) : 28 espèces reliées par 27 interactions GloBI sur 5 types (connectance 5.8%, filtre Serrano α=0.2). 3 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology2 basins · 0 lakes · 14 rivers
Hydrology metrics for this exact territory
Stream length here
43,5km
Basins crossed
2
Max stream order
4
Max drainage
1 666km²
Discharge in basins
2,6m³/s
Mean precip.
1 482mm/an
Mean T°
11,9°C
Moisture idx
0,36
Max snow
12%
Mean runoff
717mm/an
Mean elev. (basins)
319m
Watersheds crossing here
Rivers / streams (14, ord ≥ 4)
- 久慈川ord 4len here21.33 km24%total90 km
- 玉川ord 4len here4.68 km24%total20 km
- 竜神川ord 1len here3.72 km98%total4 km
- 押川ord 4len here3.25 km22%total15 km
- 殕石沢ord 1len here2.39 km49%total5 km
- 滝川ord 2len here2.26 km54%total4 km
- 湯沢川ord 1len here1.52 km100%total2 km
- 大沢川ord 1len here1.26 km16%total8 km
- 久隆川ord 1len here1.25 km23%total6 km
- 大野川ord 2len here1.09 km14%total8 km
- 荒沢ord 1len here0.32 km6%total5 km
- 浅川ord 3len here0.19 km1%total22 km
2 more river segmentssorted by Strahler order + length
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
- 36.73586, 140.38771
- 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.