The Shintoyone Dam (新豊根ダム) is a multipurpose
dam in the village of
Toyone in the
Aichi Prefecture
is a prefecture of Japan located in the Chūbu region of Honshū. Aichi Prefecture has a population of 7,552,873 () and a geographic area of with a population density of . Aichi Prefecture borders Mie Prefecture to the west, Gifu Prefectur ...
of
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
.
History
The potential of the Tenryū River valley for hydroelectric power development was realized by the
Meiji government at the start of the 20th century. The Tenryū River was characterized by a high volume of flow and a fast current. Its mountainous upper reaches and tributaries were areas of steep valleys and abundant rainfall, and were sparsely populated. However, the bulk of investment in hydroelectric power generation in the region was centered on the
Ōi River, and it was not until the
Taishō period that development began on the Tenryū River. With the completion of the
Sakuma Dam
The is a dam on the Tenryū River, located on the border of Toyone, Kitashitara District, Aichi Prefecture on the island of Honshū, Japan. It is one of the tallest dams in Japan and supports a 350 MW hydroelectric power station. Nearby a freq ...
, one of the tallest dams in Japan, on the main stream of the Tenryū River, developers turned their eyes to the confluence of the Ōnyugawa (大入川), a major tributary of the Tenryū River, and the Ōchisegawa (大千瀬川) in Aichi Prefecture. The Ōnyugawa was also of interest in that it was prone to flooding. Preliminary design work began in 1962, with construction beginning in 1969 after some opposition from the 100 households who needed to be relocated, and over increasing controversy regarding the issues of dams on the Tenryū and Ōi rivers rapidly filling with sand and silt from the mountains upstream, with the resultant reduction of the amount of sand and silt reaching the river mouth creating problems with
coastal erosion. Construction was completed by the
Kumagai Gumi in August 1973.
Design
The Shintoyone Dam is a concrete arch dam with a height of meters and a length of . It impounds a reservoir called with a surface area of . The catchment basin for the reservoir is square kilometers. The reservoir is connected by two tunnels to the
pumped-storage hydroelectric power plant constructed next to the
Sakuma Dam
The is a dam on the Tenryū River, located on the border of Toyone, Kitashitara District, Aichi Prefecture on the island of Honshū, Japan. It is one of the tallest dams in Japan and supports a 350 MW hydroelectric power station. Nearby a freq ...
which creates the lower reservoir of the scheme.
Surroundings
The Shintone Dam Reservoir is a popular attraction as the surrounding area is part of the
Tenryū-Okumikawa Quasi-National Park
is a quasi-national park in the Tōkai region of Honshū in Japan. It is rated a protected landscape (category V) according to the IUCN. The park includes the Tenryū-kyō Gorge of the upper Tenryū River in Iida, Sakuma Dam and its surrounding ...
.
See also
*
List of power stations in Japan
*
List of pumped-storage hydroelectric power stations
References
*Japan Commission on Large Dams. ''Dams in Japan:Past, Present and Future''. CRC Press (2009).
External links
photo site
{{Dams in Aichi prefecture
Dams completed in 1972
Dams in Aichi Prefecture
Arch dams