HydroBASINS lev08 watershed · #4080587490
Bassin de 利根川
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 23 administrative regions : Abiko, Bandō, Goka, Jōsō, Kashiwa +18
Sub-basin area
584,6km²
Upstream area
9 505,7km²
Discharge
135,4m³/s
Mean elev.
16m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de 渡良瀬川2572 km²
- Bassin de 利根川1169 km²
23 dept-equivalent regions (GADM L2)
- NodaChiba · Japan89.9 km²15.4% of basin
- 88.7 km²15.2% of basin
- 81.5 km²13.9% of basin
- 44.9 km²7.7% of basin
- OyamaTochigi · Japan33.5 km²5.7% of basin
- 32.3 km²5.5% of basin
- 25.5 km²4.4% of basin
- 25.5 km²4.4% of basin
15 moreFull L2 list
- Abiko23.8 km² · 4.1%
- Sugito23.7 km² · 4.0%
- Goka23.0 km² · 3.9%
- Toride20.5 km² · 3.5%
- Kurihashi17.4 km² · 3.0%
- Nogi12.2 km² · 2.1%
- Jōsō12.1 km² · 2.1%
- Kasukabe9.0 km² · 1.5%
- Washimiya8.0 km² · 1.4%
- Nagareyama5.7 km² · 1.0%
- Ōtone3.4 km² · 0.6%
- Kuki2.9 km² · 0.5%
- Kitakawabe0.5 km² · 0.1%
- Kazo0.5 km² · 0.1%
- Miyashiro0.4 km² · 0.1%
14 intersecting protected areas
Moriyatoride
IUCN IVPrefectural Wildlife Protection Area
19.39 km² overlap
Nogi
IUCN IVPrefectural Wildlife Protection Area
10.74 km² overlap
Sugaonuma
IUCN IVPrefectural Wildlife Protection Area
9.56 km² overlap
Toride
IUCN IVPrefectural Wildlife Protection Area
5.34 km² overlap
Sashima
IUCN IVPrefectural Wildlife Protection Area
4.49 km² overlap
Sowa
IUCN IVPrefectural Wildlife Protection Area
2.57 km² overlap
Sugao numa
IUCN VPrefectural Nature Conservation Area
2.24 km² overlap
Sanwa
IUCN IVPrefectural Wildlife Protection Area
0.49 km² overlap
Inba tega
IUCN VPrefectural Natural Park
0.09 km² overlap
5 more protected areassorted by overlap area
Yotsuike Four Ponds, Abiko Plant, NEC
IUCN Not ApplicableOECM
0.04 km² overlap
TOPPAN HOLDINGS INC. Technical Research Laboratory
IUCN Not ApplicableOECM
0.01 km² overlap
Maeda Corporation ICI General Center
IUCN Not ApplicableOECM
0.01 km² overlap
Katori
IUCN VGreen Space Environment Conservation Area(Ibaraki)
0.01 km² overlap
Naka yahagi
IUCN VGreen Space Environment Conservation Area(Ibaraki)
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 481 distinct species · 22 166 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 利根川 : 32 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 61 interactions GloBI sur 5 types (connectance 7.1%, filtre Serrano α=0.2). 10 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°
14,5°C
Annual rain
1 329mm
Moisture idx (CMI)
0,22
Runoff
533mm/an
PET
1 037mm
AET
1 001mm
Mean slope
0,5°
Water table
16cm
Forest
0%
Crops
6%
Urban
88%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)