HydroBASINS lev08 watershed · #4080646910
Bassin de 吉野川
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 14 administrative regions : Ino, Kami, Kumakōgen, Kōchi, Miyoshi +9
Sub-basin area
1 158,5km²
Upstream area
1 158,5km²
Discharge
62,79m³/s
Mean elev.
774m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
14 dept-equivalent regions (GADM L2)
- 295.3 km²25.5% of basin
- 208.4 km²18.0% of basin
- 192.1 km²16.6% of basin
- 147.9 km²12.8% of basin
- MiyoshiTokushima · Japan127.3 km²11.0% of basin
- 92.8 km²8.0% of basin
- 48.7 km²4.2% of basin
- 20.0 km²1.7% of basin
6 moreFull L2 list
- Shikokuchūō10.8 km² · 0.9%
- Niihama7.9 km² · 0.7%
- Saijō5.8 km² · 0.5%
- Kōchi0.5 km² · 0.0%
- Kumakōgen0.4 km² · 0.0%
- Niyodogawa0.2 km² · 0.0%
26 intersecting protected areas
Shikoku Mountains
IUCN VGreen Corridor
56.23 km² overlap
Ishizuchi
IUCN VQuasi National Park
22.41 km² overlap
Kajinomori
IUCN VPrefectural Natural Park
15.72 km² overlap
Tsurugisan
IUCN VQuasi National Park
14.27 km² overlap
Ishizuchi sankei
IUCN IVPrefectural Wildlife Protection Area
13.09 km² overlap
Kuishi yama jingamori
IUCN VPrefectural Natural Park
12.40 km² overlap
Ishizuchisankei
IUCN IVNational Wildlife Protection Area
12.39 km² overlap
Sameura
IUCN IVPrefectural Wildlife Protection Area
10.83 km² overlap
Shiraga
IUCN IVPrefectural Wildlife Protection Area
7.25 km² overlap
17 more protected areassorted by overlap area
Oboke
IUCN IVPrefectural Wildlife Protection Area
5.83 km² overlap
Sasagamine
IUCN IbNature Conservation Area
4.99 km² overlap
Shiraga yama
IUCN VPrefectural Natural Park
4.68 km² overlap
Kajiga mori
IUCN IVPrefectural Wildlife Protection Area
4.34 km² overlap
Ishizuchi Sankei
IUCN IbForest Ecosystem Reserve
3.75 km² overlap
Kuishiyama
IUCN IVPrefectural Wildlife Protection Area
3.30 km² overlap
Hokigamine
IUCN IVPrefectural Wildlife Protection Area
2.60 km² overlap
Rare Population Protected Forest
2.12 km² overlap
Ananaigawa dam
IUCN IVPrefectural Wildlife Protection Area
1.84 km² overlap
Okumononobe
IUCN VPrefectural Natural Park
1.39 km² overlap
Ryugado
IUCN VPrefectural Natural Park
0.38 km² overlap
Nokanoike
IUCN IVPrefectural Wildlife Protection Area
0.17 km² overlap
Nokanoike yama
IUCN VPrefectural Nature Conservation Area
0.11 km² overlap
The Forests of Nakae A Forest Project Good for the Planet -Two-Storied Forest in Akutagawa-
IUCN Not ApplicableOECM
0.11 km² overlap
Tsuzurao
IUCN IVPrefectural Wildlife Protection Area
0.09 km² overlap
Yasui keikoku
IUCN VPrefectural Natural Park
0.04 km² overlap
Hodono
IUCN IVPrefectural Wildlife Protection Area
0.02 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 476 distinct species · 17 217 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Not enough documented interactions to build a meaningful graph for this territory.
Hydroclimate (BasinATLAS lev08)
Mean T°
11,7°C
Annual rain
2 162mm
Moisture idx (CMI)
0,59
Runoff
1 430mm/an
PET
874mm
AET
874mm
Mean slope
21,4°
Water table
664cm
Forest
99%
Crops
0%
Urban
1%
Protected
9%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)