Sakuma dam
| Sakuma dam | |||||||||
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| Coordinates | 35 ° 5 '58 " N , 137 ° 47' 39" E | ||||||||
| Data on the structure | |||||||||
| Lock type: | Gravity dam | ||||||||
| Construction time: | 1952-1957 | ||||||||
| Height of the barrier structure : | 155.5 m | ||||||||
| Building volume: | 1.12 million m³ | ||||||||
| Crown length: | 293.5 m | ||||||||
| Power plant output: | 350 plus 1200 MW | ||||||||
| Operator: | Electric Power Development Company | ||||||||
| Data on the reservoir | |||||||||
| Water surface | 7.15 km² | ||||||||
| Storage space | 326.848 million m³ | ||||||||
| Catchment area | 4th 156.5 km² | ||||||||
| Design flood : | 7th 700 m³ / s | ||||||||
The Sakuma Dam ( Jap. 佐久間ダム , Sakuma damu ) is a dam on Tenryū , located on the border between the village of Toyone in district Kitashitara of Aichi Prefecture and Sakuma in District Tenryū the City Hamamatsu in Shizuoka Prefecture on the island of Honshu in Japan . The structure is one of the tallest dams in Japan.
The Sakuma Dam is a hollow concrete gravity dam with several central flood reliefs . It supplies two hydropower plants: the Sakuma hydropower plant and the Shin Toyone hydropower plant, with installed capacities of 350 MW and 1200 MW respectively.
history
The potential of the Tenryu River for hydroelectric power generation was recognized by the Meiji government at the beginning of the 20th century. The Tenryu has a high and rapid drainage. Its mountainous catchments and tributaries have steep valleys and copious rainfall and were sparsely populated. Nevertheless, investments in water power were mainly made on Ōi and the development of Tenryu only began in the Taishō period . The private entrepreneur Fukuzawa Momosuke founded Tenryūgawa Denryoku (Tenryugawa Electric Power), which later became Yasaku Suiryoku Denki (Yasaku Hydroelectric) before it was nationalized in the pre-war period in 1938 to become Nippon Hassōden KK (Japan Electric Generation and Transmission Company). The first dam on Tenryu, the Yasuoka Dam , was completed in 1935. Then came the Iwakura Dam in 1938 . The Hiraoka Dam was started in 1938, but was not completed until 1951 because of the Second World War.
Construction of the Sakuma dam, now under the new Dengen Kaihatsu KK ( Electric Power Development Company ), began in 1952 and was completed in 1956. The construction company was the Hazama Society . Before the damming, the Iida railway line had to be relocated. In addition, 240 houses and 296 families had to be relocated. At the official opening ceremony on October 28, 1957, the Emperor Hirohito and his wife Kōjun were present and a commemorative stamp was issued on the occasion.
Surroundings
Sakuma Reservoir is a popular canoeing and camping attraction because it is very close to Hamamatsu's old town and easily accessible. The surrounding area is part of the Tenryu Okumikawa Quasi National Park .
See also
- List of the largest dams on earth
- List of the largest reservoirs on earth
- List of the largest hydroelectric plants in the world
- List of dams in the world
swell
- Japan Commission on Large Dams: Dams in Japan: Past, Present and Future. CRC Press, 2009, ISBN 978-0-415-49432-8 .
Web links
- Sakuma HVDC-back-to-back station ( Memento from May 26, 2005 in the Internet Archive )
- Sakuma HVDC-back-to-back station scheme ( Memento of May 27, 2005 in the Internet Archive ) (PDF file)
- The stamp