A dam is a barrier that stops or restricts the flow of surface water or underground streams. Reservoirs created by dams not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture, and navigability. Hydropower is often used in conjunction with dams to generate electricity. A dam can also be used to collect or store water which can be evenly distributed between locations. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. The earliest known dam is the Jawa Dam in Jordan, dating to 3,000 BC.
The Kuma River is a river in Kumamoto Prefecture, central Western part of Kyūshū, Japan. It is sometimes referred as Kumagawa River. It is the longest river in Kyushu, with the length of 115 km long and has a drainage area of 1,880 km2 (730 sq mi). The tidal flat of the Kuma River estuary is approximately 1000 hectares.
Malampuzha Dam is the largest dam and reservoirs in Kerala, located near Palakkad, in the state of Kerala in South India, built post independence by the then Madras state. Situated in the scenic hills of the Western Ghats in the background it is a combination of a masonry dam with a length of 1,849 metres and an earthen dam with a length of 220 metres making it the longest dam in the state. The dam is 355 feet high and crosses the Malampuzha River, a tributary of Bharathappuzha, Kerala's second longest river. There is a network of two canal systems that serve the dam's reservoir of 42,090 hectares.
The Tashiro Dam is a dam on the Ōi River in Aoi-ku, Shizuoka, Shizuoka Prefecture on the island of Honshū, Japan. It was the first concrete gravity dam to be constructed on the Ōi River, and has a hydroelectric power generating station owned by the Tokyo Electric Power Company.
The Samanala Dam is a dam primarily used for hydroelectric power generation in Sri Lanka. Commissioned in 1992, the Samanalawewa Project is the third-largest hydroelectric scheme in the country, producing 405 GWh of energy annually. It was built with financial support from Japan and the United Kingdom. It is notable for a large leak on its right bank. Power production continues as planned despite the leakage, and the water from the leak now provides two thirds of the water issued by the reservoir for agriculture in downstream areas.
The Gōnokawa River is a river that runs through Hiroshima and Shimane prefectures in Japan. It is the largest river in the Chūgoku region. It is also called the Gōgawa River and, in Hiroshima, the Enokawa River.
Amekawa Dam is a check dam on Ame river in Saku, Nagano Prefecture, Japan. The primary purpose is reducing water flow velocity to counteract erosion. It is also used for water supply.
The Shin-Takasegawa Pumped Storage Station (新高瀬川発電所) uses the Takase River to operate a pumped storage hydroelectric scheme about 12 kilometres (7.5 mi) west of Ōmachi in Nagano Prefecture, Japan. Part of the system is within Chūbu-Sangaku National Park.
The Ōmachi Dam is a concrete gravity dam on the Takase River just west of Ōmachi in Nagano Prefecture, Japan. Construction of the dam began in 1975 and it was completed in 1985. The primary purpose of the dam is water supply and it also supports a 13 MW hydroelectric power station. It is owned by TEPCO.
Asagawara Dam is a dam in Tōkamachi, Niigata Prefecture, Japan, completed in 1945.
Yamamoto Reservoir is a reservoir in Niigata Prefecture, Japan. It is located in Central Japan near the Niigata Hillside Prefecture and towards the coastline. Sir S.K. Dash was the mastermind and designer for the project. The people living in the prefecture want to build a Chess Academy next to the dam named after the famous Japanese Chess Player, Obi.
Onagohata Dam is a dam in the Ōita Prefecture, Japan, completed in 1931.
Kyuragigawa Choseichi dam is a concrete gravity dam located in Saga Prefecture in Japan. The dam is used for power production. The catchment area of the dam is 20.9 km2. The dam impounds about 1 ha of land when full and can store 84 thousand cubic meters of water. The construction of the dam was started on 1918 and completed in 1930.
Shiota Choseichi Dam is a rockfill dam located in Tochigi prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.3 km2. The dam impounds about 12 ha of land when full and can store 1580 thousand cubic meters of water. The construction of the dam was started on 1982 and completed in 2000.
Sugamata Choseichi is a gravity dam located in Tochigi prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.2 km2. The dam impounds about 6 ha of land when full and can store 490 thousand cubic meters of water. The construction of the dam was started on 1982 and completed in 2002.
Magawa Choseichi is a buttress dam located in Toyama prefecture in Japan. The dam is used for power production. The catchment area of the dam is 105 km2. The dam impounds about 1 ha of land when full and can store 48 thousand cubic meters of water. The construction of the dam was started on 1927 and completed in 1929.
Gamagori Choseichi Dam is a rockfill dam located in Aichi Prefecture in Japan. The dam is used for irrigation and water supply. The catchment area of the dam is 0.8 km2. The dam impounds about 5 ha of land when full and can store 612 thousand cubic meters of water. The construction of the dam was started on 1977 and completed in 1996.
Kotozawa Choseichi Dam is a rockfill dam located in Aichi Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.2 km2. The dam impounds about 1 ha of land when full and can store 74 thousand cubic meters of water. The construction of the dam was started on 1969 and completed in 1981.
Yahata Choseichi Dam is a rockfill dam located in Aichi Prefecture in Japan. The dam is used for irrigation. The catchment area of the dam is 0.7 km2. The dam impounds about 2 ha of land when full and can store 66 thousand cubic meters of water. The construction of the dam was started on 1969 and completed in 1986.
