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Yamakuni River

From Wikipedia, the free encyclopedia

Native name山国川 (Japanese)
Location
IslandKyushu
RegionŌita Prefecture, Fukuoka Prefecture
Physical characteristics
Mouth 
 • location
Yoshitomi, Fukuoka, Nakatsu, Ōita
 • coordinates
33°37′06″N 131°11′10″E / 33.618281°N 131.186234°E / 33.618281; 131.186234
Length56 km (35 mi)[1]
Basin size540 km2 (210 sq mi)[1]
Discharge 
 • maximum4800 cubic meters/s in 1944[1]

The Yamakuni River (山国川, Yamakuni-gawa) is a river that flows through the Ōita Prefecture in Japan. In its lower reaches it provides the boundary to the Fukuoka Prefecture to the west.

Yamakuni River near Aonodōmon Tunnel

The Yamakuni River arises on the slopes of the sacred Mount Hiko on the border of Oita and Fukuoka prefectures, flowing towards the sea through the Yabakei and Nakatsu plains, and empties into the Seto Inland Sea.[1] Tributaries include the Yamaoi River, Atoda River and Yamautsuri River.

It is known as the largest rapid river in Kyushu, and when torrential rain occurs in the upper reaches, a large amount of rain flows down in a short time, which has the characteristic of causing flooding.

Structures

Yamakuni River from Domombashi Bridge

The Yabakei Dam[2] on a tributary, the Yamautsuri River, and Heisei Ozeki Barrage,[3] help control the river system.

Yamakuni River from Zenkaibashi Bridge

The Yabakei Bridge over it, is the longest stone bridge in Japan.[4][5][6][7]

Tourism

It runs through the Yabakei Gorge (Shinyabakei Gorge) and is adjacent to Aonodōmon (Blue Tunnel) in the Yaba-Hita-Hikosan Quasi-National Park. Its upper reaches include the scenic Marinkyo Gorge.[1]

History

Significant floods have occurred in September 1944 (typhoon), September 1993 (typhoon) and July 2012.[1] Drought is also frequent and was recorded in 9 of the first 31 years after the construction of the Heisei flood barrier.[1]

References

  1. ^ a b c d e f g "山国川". Retrieved 1 October 2022.
  2. ^ "Yabakei Dam". Structurae. Retrieved 1 October 2022.
  3. ^ "Heisei Ozeki Dam". Structurae. Retrieved 1 October 2022.
  4. ^ 文化審議会の答申(国宝・重要文化財(建造物)の指定)について [On the Report of the Council of Cultural Affairs (Designation of National Treasures and Important Cultural Properties (Structures))] (PDF) (in Japanese). Agency for Cultural Affairs. 20 May 2022. Retrieved 23 May 2022.
  5. ^ 耶馬渓橋 [Yabakei Bridge] (in Japanese). Nakatasu City. 9 May 2017. Retrieved 23 May 2022.
  6. ^ 耶馬渓橋が国の重要文化財に指定されることが決定しました! [Decision on the Designation of Yabakei Bridge as a National Important Cultural Property!] (PDF) (in Japanese). Nakatasu City. 21 May 2022. Retrieved 23 May 2022.
  7. ^ 耶馬渓橋が国の重要文化財に指定決定! [Decision to Designate Yabakei Bridge a National Important Cultural Property!] (PDF) (in Japanese). Nakatasu City. May 2022. Retrieved 23 May 2022.


This page was last edited on 10 July 2023, at 09:26
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