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Tashiro Dam
The 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. 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 , for its plan to divert water from the Ōi River to the Hayakawa River in Yamanashi Prefecture through a syst ... [...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] |
Hayakawa River
Hayakawa (written: 早川) is a Japanese surname. Notable people with the surname include: *Chuko Hayakawa (born 1945), Japanese politician *Hiromi Hayakawa (1982–2017), Mexican singer *, Japanese swimmer *Kenichi Hayakawa (born 1986), Japanese male badminton player * Kiyotaka Hayakawa (1946–2005), Japanese handball player * Masato Hayakawa (born 1986), Japanese-American singer *Nami Hayakawa (born 1984), Japanese athlete *Norio Hayakawa (born 1944), American activist *Noritsugu Hayakawa (1881–1942), Japanese businessman * Ren Hayakawa (born 1987), Japanese female archer * S. I. Hayakawa (1906–1992), semanticist and United States Senator from California *Sakura Hayakawa (born 1997), Japanese rhythmic gymnast *Sayo Hayakawa (born 1983), Japanese fashion model *Sessue Hayakawa (1889–1973), motion picture actor *Tokuji Hayakawa (1894–1981), founder of Hayakawa Kinzoku Kougyou (the present-day Sharp Corporation) *Tomonobu Hayakawa (born 1977), former Japanese footballer *Haya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectric Power Stations In Japan
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...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] |
Hydroelectric Power Plant
Hydroelectricity, or hydroelectric power, is electricity generated from hydropower (water power). Hydropower supplies one sixth of the world's electricity, almost 4500 TWh in 2020, which is more than all other renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Akaishi Mountains
The are a mountain range in central Honshū, Japan, bordering Nagano, Yamanashi and Shizuoka prefectures. It is also called the , as it joins with the Hida Mountains ("Northern Alps") and the Kiso Mountains ("Central Alps") to form the Japanese Alps. Origin of the name There are a lot of red stones (赤石 Aka-Ishi) around the Akaishi River, a tributary of the Ōi River in the southern part of Southern Alps. Then it was said that the mountain of red stone came to be called Mount Akaishi. The mountain represents the mountain range and the name ''Akaishi'' is used for the whole range mountain range, Akaishi Mountains. Major peaks Almost all major peaks of the Akaishi Mountains are in Minami Alps National Park that was established on June 1, 1964. (home page of the [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tokyo Electric Power
, also known as or TEPCO, is a Japanese electric utility holding company servicing Japan's Kantō region, Yamanashi Prefecture, and the eastern portion of Shizuoka Prefecture. This area includes Tokyo. Its headquarters are located in Uchisaiwaicho, Chiyoda, Tokyo, and international branch offices exist in Washington, D.C., and London. It is a founding member of strategic consortiums related to energy innovation and research; such as JINED, INCJ and MAI. In 2007, TEPCO was forced to shut the Kashiwazaki-Kariwa Nuclear Power Plant after the Niigata-Chuetsu-Oki earthquake. That year it posted its first loss in 28 years. Corporate losses continued until the plant reopened in 2009. Following the 2011 Tōhoku earthquake and tsunami, one of its power plants was the site of one of the world's most serious ongoing nuclear disaster, the Fukushima Daiichi nuclear disaster. TEPCO could face ¥ ($) in special losses in the current business year to March 2012, and the Japanese government ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chubu Electric Power
, abbreviated as Chuden in Japanese, is a Japanese electric utilities provider for the middle Chūbu region of the Honshu island of Japan. It provides electricity at 60 Hz, though an area of Nagano Prefecture uses 50 Hz. Chubu Electric Power ranks third among Japan's largest electric utilities in terms of power generation capacity, electric energy sold, and annual revenue. It is also one of Nagoya's "four influential companies" along with Meitetsu, Matsuzakaya, and Toho Gas. Recently, the company has also expanded into the business of optical fibers. On January 1, 2006, a new company, Chubu Telecommunications, was formed. Recent news In May 2011, Prime Minister Naoto Kan requested that the Hamaoka Nuclear Power Plant, which sits in an area considered overdue for a large earthquake, be shut down, after which Chubu Electric Power suspended operations at the plant. A lawsuit seeking the decommissioning of the reactors at the Hamaoka plant permanently has been filed. In Au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Penstock
A penstock is a sluice or gate or intake structure that controls water flow, or an enclosed pipe that delivers water to hydro turbines and sewerage systems. The term is inherited from the earlier technology of mill ponds and watermills. Hydroelectric systems and dams Penstocks for hydroelectric installations are normally equipped with a gate system and a surge tank. They can be a combination of many components such as anchor block, drain valve, air bleed valve, and support piers depending on the application. Flow is regulated by turbine operation and is nil when turbines are not in service. Penstocks, particularly where used in polluted water systems, need to be maintained by hot water washing, manual cleaning, antifouling coatings, and desiccation. The term is also used in irrigation dams to refer to the channels leading to and from high-pressure sluice gates. Penstocks are also used in mine tailings dam construction. The penstock is usually situated fairly close to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
