Kitagawa Dam

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Kitagawa Dam
Kitagawa-2757-r1.JPG
Location Ōita Prefecture, Japan
Construction began 1958
Opening date 1962
Operator(s) Ōita Prefecture
Dam and spillways
Type of dam Concrete arch dam
Height 82.0 m
Length 188.3 m
Dam volume 66,000 m³
Reservoir
Catchment area 211.0 km²
Surface area 200.0 ha
Power Station
Annual generation 25,100kW

Kitagawa Dam (Japanese : 北川ダム) is a dam in the Saiki, Ōita, Japan, completed in 1962. [1] It spans the Kita River, a class A river, in the Gokase River drainage system. It is managed by Ōita Prefecture, and it is an 82.0 meter tall concrete arch dam. It is the largest dam in the Gokase River drainage system, and it was built with government subsidies with the goal of flood control and hydroelectric power generation for the Kita River basin. The man-made lake formed by the dam is the largest such reservoir of any dam administered by the prefecture, but it is simply called the Kitagawa Dam Lake and has no nickname. Despite that in 2005 it was selected by the Dam Waters Environment Development Center Foundation as one of the top one hundred reservoirs.

Japanese is an East Asian language spoken by about 128 million people, primarily in Japan, where it is the national language. It is a member of the Japonic language family, and its relation to other languages, such as Korean, is debated. Japanese has been grouped with language families such as Ainu, Austroasiatic, and the now-discredited Altaic, but none of these proposals has gained widespread acceptance.

Dam A barrier that stops or restricts the flow of surface or underground streams

A dam is a barrier that stops or restricts the flow of 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 water or for storage of 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.

Saiki, Ōita City in Kyushu, Japan

Saiki is a city located in Ōita Prefecture, Japan. The city was founded on April 29, 1941.

Summary

The Kita River originates in Ōita Prefecture and flows into the Sea of Hyūga off Miyagi Prefecture after joining its tributary Nakadake River, and along the way flows close to the border of the two prefectures, and Kitagawa Dam, built to dam this river, was the first concrete arch dam in Ōita Prefecture. According to Ōita Electric Power Department, the dam was built to be a multipurpose dam for flood control and power generation, and the height of the headwaters was low at 285 meters, and to function in the Kita River which has a narrow grade, the dam functions with an unusually narrow height difference.

Sea of Hyūga

The Hyuga-nada Sea is the part of the Pacific Ocean that lies off the eastern shore of the island of Kyushu, to the south-west of the island of Honshu, off the south coast of Japan. Its name is derived from the former province of Hyūga, which corresponded to the prefecture of Miyazaki before the Meiji Restoration.

Miyagi Prefecture Prefecture of Japan

Miyagi Prefecture is a prefecture in the Tōhoku region of Japan. The capital is Sendai.

The portion of Kita River upstream of where Nakadake River joins it is known as Tashiro River. A stone arched bridge built across the Tashiro River in 1908, directly upstream of where the rivers merge, is submerged in the reservoir. The stone bridge is 10 meters from the bottom of the lake, so it is visible only from the summer dry season until the reservoir becomes full when the rainy season starts or a typhoon comes.

Kitagawa Dam's reservoir has been chosen as one of the top 100 reservoirs. On the left bank of the reservoir is Japan National Route 326, the spot where the Nakadake River tributary flows into Kita River has a local folk song called "Ume no Utagenka", and the Utagenka Bridge located there is connected to that song, and in the vicinity of the bridge is the Ume Rest Area. The vicinity of the dam is the natural habitat of the mountain hawk-eagle, and in 1981 the prefecture designated it as a protected wildlife area.

Japan National Route 326 road in Japan

National Route 326 is a national highway of Japan connecting Nobeoka, Miyazaki and Bungo-ōno, Ōita in Japan, with a total length of 68.3 km (42.44 mi).

Mountain hawk-eagle species of bird

The mountain hawk-eagle or, alternately, Hodgson's hawk-eagle is a large bird of prey native to Asia. The latter name is in reference to the naturalist, Brian Houghton Hodgson, who described the species after collecting one himself in the Himalayas. A less widely recognized common English name is the feather-toed eagle. Like all eagles, it is in the family Accipitridae. Its feathered tarsus marks this species as a member of the Aquilinae subfamily. It is a confirmed breeding species in the northern part of the Indian subcontinent, from India, Nepal through Bangladesh to Thailand, Taiwan and Japan, although its distribution could be wider still as breeding species. Like other Asian hawk-eagles, this species was earlier treated under the genera of Spizaetus but genetic studies have shown this group to be paraphyletic, resulting in the Old World members being placed in Nisaetus and separated from the New World species. As is typical of hawk-eagles, the mountain hawk-eagle is a forest dwelling opportunistic predator who readily varies its prey selection between birds, mammals and reptiles along with other vertebrates. Although classified currently as a least-concern species due its persistence over a rather wide distribution, this species is often quite rare and scarce and seems to be decreasing, especially in response to large-scale habitat degradation and deforestation.

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References

Coordinates: 32°47′26″N131°36′28″E / 32.79056°N 131.60778°E / 32.79056; 131.60778

Geographic coordinate system Coordinate system

A geographic coordinate system is a coordinate system that enables every location on Earth to be specified by a set of numbers, letters or symbols. The coordinates are often chosen such that one of the numbers represents a vertical position and two or three of the numbers represent a horizontal position; alternatively, a geographic position may be expressed in a combined three-dimensional Cartesian vector. A common choice of coordinates is latitude, longitude and elevation. To specify a location on a plane requires a map projection.