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Nagashima Dam
The is a dam on the Ōi River, located in Kawanehon Town, Haibara District, Shizuoka Prefecture on the island of Honshū, Japan. History The potential of the Ōi River valley for hydroelectric power development was realized by the Meiji government at the start of the twentieth century. The Ōi 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. In 1906, a joint venture company, the was established, and began studies and design work on plans to exploit the potential of the Ōi River and Fuji River in Shizuoka Prefecture. The British interests were bought out by 1921, and the company was renamed . By the mid-1950s, several dams had been completed on the upper reaches of the Ōi River and its tributaries. In September 1954, a typhoon caused flooding in the downstream reaches of the Ōi River, leading to plans being drawn by the central gov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ōi River
The is a river in Shizuoka Prefecture, Japan. Geography The Ōi River flows from the Akaishi Mountains, the branch of the Japanese Southern Alps which form the border between Shizuoka, Nagano and Yamanashi prefectures. These mountains, with peaks ranging from 2000–3000 meters, are characterized by heavy rainfall (up to 3000 mm per year) and deep V-shaped valleys. The river follows a generally southern course, with seven wide bends in its central region, before exiting into Suruga Bay in the Philippine Sea. History The Ōi River is mentioned in Nara period records as forming the border between Tōtōmi and Suruga Provinces. However, due to shifting of the course of the river over the centuries, by the late Muromachi period, this was not always the case. During the Edo period, the Tōkaidō developed as the major highway linking Edo with Kyoto, and ''daimyōs'' from the western domains were forced to travel on a regular basis to Edo to attend to the ''shōgun'' in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shimizu Corporation
is an architectural, civil engineering and general contracting firm. It has annual sales of approximately US$15 billion and has been widely recognized as one of the top 5 contractors in Japan and among the top 20 in the world. It is a family business listed in the Tokyo and Osaka stock exchanges and a constituent of the Nikkei 225 index. About Shimizu The company is named after its founder Kisuke Shimizu, who was born in Koba Village, Etchu (now part of Toyama), and has nothing to do with the former city Shimizu in Shizuoka Prefecture. Kisuke Shimizu formed the company in Edo (now Tokyo) in 1804. The company has been headquartered there ever since. Shimizu Corporation is an international general contractor, publicly listed on the Tokyo, Nagoya Stock Exchange and the Osaka Securities Exchange and is a constituent of the Nikkei 225 stock index. It has a network spanning Asia, Europe, North America, the Middle East and Africa. Services offered * Planning & Consulting * Devel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dams In Shizuoka Prefecture
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 (also known as dikes) 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 word ''dam'' can be traced back to Middle English, and before that, from Middle Dutch, as seen in the names of many old cities, such as Amsterdam and Rotterdam. History Ancient dams Early dam building took place in Mesopotamia and the Middle East. Dams were us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity Dams
A gravity dam is a dam constructed from concrete or stone masonry and designed to hold back water by using only the weight of the material and its resistance against the foundation to oppose the horizontal pressure of water pushing against it. Gravity dams are designed so that each section of the dam is stable and independent of any other dam section. Characteristics Gravity dams generally require stiff rock foundations of high bearing strength (slightly weathered to fresh), although in rare cases, they have been built on soil foundations. The bearing strength of the foundation limits the allowable position of the resultant force, influencing the overall stability. Also, the stiff nature of the gravity dam structure is unforgiving to differential foundation settlement, which can induce cracking of the dam structure. Gravity dams provide some advantages over embankment dams, the main advantage being that they can tolerate minor over-topping flows without damage, as the concre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minami Alps National Park
is a national park in the Akaishi Mountains, Chūbu region, Honshū, Japan. The Minami Alps National Park was established on June 1, 1964. It extends along the border of Shizuoka, Yamanashi and Nagano Prefectures for a length of , and a maximum width of for a total area of . The Park is a very mountainous region, centering on the Akaishi Mountains with several noted peaks of over 3000 meters in height, including Koma-ga-take, Senjō-ga-take, Akaishi-dake and Kita-dake. The park also protects the headwaters of the Fuji River, Ōi River and Tenryū River. Flora in the park includes extensive stands of Japanese beech, Japanese stone pine and hemlock spruce. The largest fauna is the '' kamoshika'' and noted avian species include the ptarmigan. The park has minimal public facilities, and the only approach is by mountaineering. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nagashima Dam Station
is a railway station in the town of Kawanehon, Haibara District, Shizuoka Prefecture, Japan, operated by the Ōigawa Railway. In between Abt Ichishiro Station and Nagashima Dam Station, the gradient is very steep and an Abt rack system is used. Lines Nagashima Dam Station is served by the Ikawa Line, and is located 11.4 kilometers from the official starting point of the line at . Station layout The station has two opposed side platforms serving two tracks, connected to a small red-roofed station building by a level crossing. The station is unattended. Adjacent stations , - !colspan=5, Ōigawa Railway Station history Nagashima Dam Station was opened on October 2, 1990, when part of the Ikawa Line was re-routed to avoid the rising waters of the lake created by the Nagashima Dam. Passenger statistics In fiscal 2017, the station was used by an average of 7 passengers daily (boarding passengers only). Surrounding area *Nagashima Dam See also * List of Railway Stations i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Locomotives
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomotive's boiler to the point where it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels. In most locomotives, the steam is admitted alternately to each end of its cylinders, in which pistons are mechanically connected to the locomotive's main wheels. Fuel and water supplies are usually carried with the locomotive, either on the locomotive itself or in a tender coupled to it. Variations in this general design include electrically-powered boilers, turbines in place of pistons, and using steam generated externally. Steam locomotives were first developed in the United Kingdom during the early 19th century and used for railway transport until the middle of the 20th century. Richard Trevithick bui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Onsen
In Japan, are the country's hot springs and the bathing facilities and traditional inns around them. As a volcanically active country, Japan has many onsens scattered throughout all of its major islands. There are approximately 25,000 hot spring sources throughout Japan that provide hot mineral water to about 3,000 genuine onsen establishments. Onsens come in many types and shapes, including and . Baths may be either publicly run by a municipality or privately, often as part of a hotel, ''ryokan'', or . The presence of an onsen is often indicated on signs and maps by the symbol ♨ or the kanji (''yu'', meaning "hot water"). Sometimes the simpler hiragana character ゆ (''yu''), understandable to younger children, is used. Traditionally, onsens were located outdoors, although many inns have now built indoor bathing facilities as well. Nowadays, as most households have their own bath, the number of traditional public baths has decreased, but the number of sightseeing ho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nagashima Dam Lake
was a series of fortresses and fortifications controlled by the Ikkō-ikki, a sect of warrior monks in Japan's Sengoku period who opposed samurai rule. It was attacked and destroyed by Oda Nobunaga in the 1570s. This, combined with the surrender of the Ikki's other main fortress, Ishiyama Hongan-ji, several years later, ended the threat the Ikko-ikki posed to Nobunaga and other ''samurai'' conquerors. The fortress was situated on a swampy delta, on the border of Owari and Ise Provinces, at the point where three rivers converge, to the southwest of the modern-day city of Nagoya. Nagashima was in fact a number of smaller fortifications surrounding two primary buildings and not a single fortress. Nagashima Castle was built in 1555 by Ito Shigeharu, and seized by the Ikkō-ikki shortly afterwards, in much the same way they had seized a number of other daimyōs' holdings. The Ganshō-ji fortified monastery formed the second center of Nagashima's defense. At one time, the area may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Check Dam
A steel check dam A check dam is a small, sometimes temporary, dam constructed across a swale, drainage ditch, or waterway to counteract erosion by reducing water flow velocity. Check dams themselves are not a type of new technology; rather, they are an ancient technique dating from the second century A.D. Check dams are typically, though not always, implemented in a system of several dams situated at regular intervals across the area of interest. Function A check dam placed in the ditch, swale, or channel interrupts the flow of water and flattens the gradient of the channel, thereby reducing the velocity. In turn, this obstruction induces infiltration and reduces eroding. They can be used not only to slow flow velocity but also to distribute flows across a swale to avoid preferential paths and guide flows toward vegetation. Although some sedimentation may result behind the dam, check dams do not primarily function as sediment-trapping devices. For instance, on the Graliwdo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Senzu Dam
The is a dam on the Sumata River, a tributary of the Ōi River, located in Kawanehon Town, Haibara District, Shizuoka Prefecture on the island of Honshū, Japan. History The potential of the Ōi River valley for hydroelectric power development was realized by the Meiji government at the start of the 20th century. The Ōi 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. In 1906, a joint venture company, the was established, and began studies and design work on plans to exploit the potential of the Ōi River and Fuji River in Shizuoka Prefecture. The British interests were bought out by 1921, and the company was renamed . As early as the late 1920s, developers began to turn their attention to various tributary streams of the Ōi River, especially the Sumata River, with its steep-sided gorge and considerable flow volume. Construction ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spillway
A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure that water does not damage parts of the structure not designed to convey water. Spillways can include floodgates and fuse plugs to regulate water flow and reservoir level. Such features enable a spillway to regulate downstream flow—by releasing water in a controlled manner before the reservoir is full, operators can prevent an unacceptably large release later. Other uses of the term "spillway" include bypasses of dams and outlets of channels used during high water, and outlet channels carved through natural dams such as moraines. Water normally flows over a spillway only during flood periods, when the reservoir has reached its capacity and water continues entering faster than it can be released. In contrast, an intake tower is a structure ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
