HydroBASINS lev08 watershed · #4080041800
Bassin de 錦川
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 59 administrative regions : Abu, Akitakata, Akiōta, Asakuchi, Atō +54
Sub-basin area
14 400,6km²
Upstream area
14 400,6km²
Discharge
6,28m³/s
Mean elev.
273m
Administrative coverage
59 dept-equivalent regions (GADM L2)
- 911.4 km²6.3% of basin
- 867.0 km²6.0% of basin
- 748.1 km²5.2% of basin
- 731.7 km²5.1% of basin
- ShimonosekiYamaguchi · Japan720.4 km²5.0% of basin
- 705.0 km²4.9% of basin
- 645.3 km²4.5% of basin
- HigashihiroshimaHiroshima · Japan631.2 km²4.4% of basin
51 moreFull L2 list
- Hamada538.6 km² · 3.7%
- Hatsukaichi481.1 km² · 3.3%
- Fukuyama479.6 km² · 3.3%
- Mine473.6 km² · 3.3%
- Mihara444.4 km² · 3.1%
- Nagato359.7 km² · 2.5%
- Kure352.6 km² · 2.4%
- Kitahiroshima352.2 km² · 2.4%
- Akiōta343.6 km² · 2.4%
- Yoshika335.0 km² · 2.3%
- Tsuwano307.3 km² · 2.1%
- Onomichi293.3 km² · 2.0%
- Ube291.5 km² · 2.0%
- Atō290.8 km² · 2.0%
- Hōfu183.5 km² · 1.3%
- Sera170.8 km² · 1.2%
- Fuchū City163.2 km² · 1.1%
- Yanai143.2 km² · 1.0%
- Imabari142.5 km² · 1.0%
- Suō-Ōshima140.3 km² · 1.0%
- San'yō-Onoda128.0 km² · 0.9%
- Abu122.0 km² · 0.8%
- Takehara113.7 km² · 0.8%
- Kasaoka112.0 km² · 0.8%
- Etajima103.5 km² · 0.7%
- Hikari92.6 km² · 0.6%
- Kudamatsu89.6 km² · 0.6%
- Akitakata86.3 km² · 0.6%
- Gōtsu65.6 km² · 0.5%
- Ōtake63.8 km² · 0.4%
- Asakuchi58.3 km² · 0.4%
- Kurashiki47.5 km² · 0.3%
- Ōsakikamijima44.4 km² · 0.3%
- Tabuse44.0 km² · 0.3%
- Kaminoseki35.5 km² · 0.2%
- Jinsekikōgen34.0 km² · 0.2%
- Hirao32.4 km² · 0.2%
- Kamijima31.7 km² · 0.2%
- Kumano29.8 km² · 0.2%
- Ibara25.5 km² · 0.2%
- Waki19.8 km² · 0.1%
- Satoshō16.6 km² · 0.1%
- Marugame16.5 km² · 0.1%
- Saka15.0 km² · 0.1%
- Kaita13.3 km² · 0.1%
- Matsuyama10.1 km² · 0.1%
- Fuchū8.2 km² · 0.1%
- Tadotsu4.6 km² · 0.0%
- Miyoshi3.1 km² · 0.0%
- Yakage1.8 km² · 0.0%
- Ōnan0.1 km² · 0.0%
30 intersecting protected areas
Setonaikai
IUCN VNational Park
742.85 km² overlap
Common fishery right area
295.12 km² overlap
Nishichugokusanchi
IUCN VQuasi National Park
281.99 km² overlap
Kitanagatokaigan
IUCN VQuasi National Park
193.53 km² overlap
Common fishery right area
172.59 km² overlap
Yamaguchi genjibotaru hasseichi
IUCN IIINational Natural Monument
142.42 km² overlap
Common fishery right area
82.14 km² overlap
Chomon Kyo
IUCN VPrefectural Natural Park
58.13 km² overlap
Akiyoshidai
IUCN VQuasi National Park
45.38 km² overlap
21 more protected areassorted by overlap area
Omijima
IUCN IVPrefectural Wildlife Protection Area
42.79 km² overlap
Miyajima
IUCN IVPrefectural Wildlife Protection Area
37.34 km² overlap
Rakan zan
IUCN VPrefectural Natural Park
37.17 km² overlap
Toyota
IUCN VPrefectural Natural Park
35.85 km² overlap
Akiyoshidai
IUCN IVPrefectural Wildlife Protection Area
31.93 km² overlap
Oharako
IUCN IVPrefectural Wildlife Protection Area
31.00 km² overlap
Iwaki san
IUCN VPrefectural Natural Park
28.12 km² overlap
Common fishery right area
24.18 km² overlap
Common fishery right area
21.74 km² overlap
Yasumiyama
IUCN IVPrefectural Wildlife Protection Area
20.39 km² overlap
Kanmuriyama
IUCN IVPrefectural Wildlife Protection Area
17.79 km² overlap
Iwami
IUCN VICoastline Marine Resource Development Area, designated sea area
17.60 km² overlap
Higashimagura-Maruyama dam
IUCN IVPrefectural Wildlife Protection Area
15.45 km² overlap
Itsukijima shuhen
IUCN IVPrefectural Wildlife Protection Area
14.06 km² overlap
Rakanzan
IUCN IVPrefectural Wildlife Protection Area
14.03 km² overlap
Sandankyo
IUCN IVPrefectural Wildlife Protection Area
13.94 km² overlap
Fukuoji
IUCN IVPrefectural Wildlife Protection Area
13.14 km² overlap
Mikuradake
IUCN IVPrefectural Wildlife Protection Area
12.79 km² overlap
Ushitayama
IUCN IVPrefectural Wildlife Protection Area
12.68 km² overlap
Sagatani
IUCN IVPrefectural Wildlife Protection Area
12.50 km² overlap
Jakuchisan
IUCN IVPrefectural Wildlife Protection Area
11.93 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
7 143 distinct species · 108 438 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 錦川 : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 41 interactions GloBI sur 3 types (connectance 10.1%, 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°
13,6°C
Annual rain
1 742mm
Moisture idx (CMI)
0,42
Runoff
886mm/an
PET
979mm
AET
971mm
Mean slope
11,2°
Water table
403cm
Forest
68%
Crops
7%
Urban
16%
Protected
14%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)