HydroBASINS lev08 watershed · #4080540870
Bassin de 破間川
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 10 administrative regions : Kawaguchi, Minakami, Minamiuonuma, Nagaoka, Ojiya +5
Sub-basin area
1 507,4km²
Upstream area
1 507,4km²
Discharge
74,32m³/s
Mean elev.
599m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
10 dept-equivalent regions (GADM L2)
- 664.9 km²44.1% of basin
- MinamiuonumaNiigata · Japan571.5 km²37.9% of basin
- YuzawaNiigata · Japan148.6 km²9.9% of basin
- 48.8 km²3.2% of basin
- 43.0 km²2.8% of basin
- 18.2 km²1.2% of basin
- 12.1 km²0.8% of basin
- 0.5 km²0.0% of basin
30 intersecting protected areas
Echigosanzan-Tadami
IUCN IIQuasi National Park
269.48 km² overlap
Uonuma renpo
IUCN VPrefectural Natural Park
137.45 km² overlap
Yunotani okutadamiko
IUCN IVPrefectural Wildlife Protection Area
125.78 km² overlap
Minakami
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
106.26 km² overlap
Jujikyo
IUCN IVPrefectural Wildlife Protection Area
91.52 km² overlap
Echigo line
IUCN VGreen Corridor
69.50 km² overlap
Mikuni Line
IUCN VGreen Corridor
58.28 km² overlap
Mantaroyama
IUCN IVPrefectural Wildlife Protection Area
52.86 km² overlap
Echigosanzan
IUCN IVPrefectural Wildlife Protection Area
46.66 km² overlap
21 more protected areassorted by overlap area
Forest Ecosystem Reserve
44.88 km² overlap
Joshinetsukogen
IUCN IINational Park
39.61 km² overlap
Sumon
IUCN IVPrefectural Wildlife Protection Area
30.92 km² overlap
Sakatoyama
IUCN IVPrefectural Wildlife Protection Area
12.57 km² overlap
Asakusadake
IUCN IVPrefectural Wildlife Protection Area
11.64 km² overlap
Sumondake
IUCN IVBiocenosis Protected Forest
10.76 km² overlap
Nakanoshima
IUCN IVPrefectural Wildlife Protection Area
8.65 km² overlap
Gongendo
IUCN IVPrefectural Wildlife Protection Area
8.13 km² overlap
Ontakesan
IUCN IVPrefectural Wildlife Protection Area
4.60 km² overlap
Prefectural Natural Park
4.34 km² overlap
Naritasan
IUCN IVPrefectural Wildlife Protection Area
3.00 km² overlap
Yamanoaikawa
IUCN IVPrefectural Wildlife Protection Area
2.61 km² overlap
Tadami
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve
1.59 km² overlap
Okuaizu
IUCN IbForest Ecosystem Reserve
1.59 km² overlap
Tanikawadake
IUCN IVPrefectural Wildlife Protection Area
1.24 km² overlap
Tadami
IUCN IVPrefectural Wildlife Protection Area
1.10 km² overlap
Okuhayade awasumon
IUCN VPrefectural Natural Park
0.94 km² overlap
Prefectural Nature Conservation Area
0.73 km² overlap
Sennokurayama
IUCN IVPrefectural Wildlife Protection Area
0.71 km² overlap
Tonegawa genryubu
IUCN IbNature Conservation Area
0.59 km² overlap
Uramakihata keikoku
IUCN VPrefectural Nature Conservation Area
0.42 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
1 452 distinct species · 5 717 observations
Source: GBIF Occurrence snapshot 2026-05-01.
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).
Indicateurs du tissu écologique
Tissu écologique de Bassin de 破間川 : 23 espèces reliées par 27 interactions GloBI sur 6 types (connectance 7.1%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
10,0°C
Annual rain
1 909mm
Moisture idx (CMI)
0,53
Runoff
1 458mm/an
PET
898mm
AET
886mm
Mean slope
17,2°
Water table
509cm
Forest
53%
Crops
18%
Urban
7%
Protected
35%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)