alphabetlight-water reactor
LWL (Low Water Level) → Lowest water level
dam terminology
alphabet alphabetDWL
DWL (Design Water Level) → Design flood level
"a" column or row of the kana syllabaryperforated dam
Anaaki Dam AKA: Flood control dam, flood control dam Anaaki Dam is a flood control dam that specializes in flood control only, and is so called because it has a gate with a permanent hole at the bottom of its embankment, which is equivalent to a permanent flood discharge. Many of these dams also have...
"a" column or row of the kana syllabaryOuenwa Dam
The Ouenwa Dam is a fictional dam that was the setting for Yuichi Shimpo's suspense novel "Whiteout," which was also made into a movie. It is supposed to be under the jurisdiction of the Nagami Power Station of the North Japan Electric Power Co. The model in the novel is Okutadami Dam (0500-Okutadami Dam), but Kurobe Dam (0848-Kurobe Dam) was used for the film location.
Introduction to DamsSeason for Familiarization with Forests and Lakes
The "Season for Familiarization with Forests and Lakes" began in 1987 and is a period (from July 21 to 31 every year) during which the Ministry of Land, Infrastructure, Transport and Tourism, the Forestry Agency, and the Japan Water Agency began educational activities to promote awareness of dams, dam lakes, water sources, and so on. During this period, various events are held at each dam.
Introduction to Damsfillet
A fillet is a reinforcing thickening section placed at the bottom of the upstream side of a dam embankment. They are installed when the strength of the concrete dam cannot be maintained or to ensure stability against overturning. They are installed in a triangular shape so that the upstream slope is slower.
"ta" column or row of the kana syllabarydam tour
A dam tour is a visit to several dams. （It is (mainly) a term for dam enthusiasts. In most cases, you can reach several dams by going upstream on the main stream and tributaries of a river. The Oigawa and Tenryu Rivers in Shizuoka Prefecture have so many dams that they are called "dam heaven," and it may take a whole day to visit them, or even longer in some cases.
Introduction to DamsSurface water intake system
A surface intake facility is a facility that withdraws water from the surface where the water temperature is warmer than the lower levels. It has the advantage of not affecting crops and organisms. In addition, dams for power generation are sometimes installed to prevent turbid water. In some dams, aging surface intake facilities are replaced with selective intake facilities to improve reliability, operability, and maintenance management.
Introduction to Damsemergency flood discharge
An emergency flood discharge is a gate that prevents overflow of a dam during a flood. It is used in the event of a flood that is too large to be discharged by the normal flood discharge. In most cases, the emergency flood discharge is located near the top of the embankment.
Introduction to Damsnon-flood season
The non-flood season refers mainly to the winter months, when precipitation is low. This means that the water level of the dam lake is higher. The period varies from dam to dam and is set in detail. ⇔Flood season
"a" column or row of the kana syllabaryweir
A weir is a structure built across a river. Under the River Act, a dam is defined as a structure that is 15 meters or longer, while a weir is generally defined as a structure that is shorter than 15 meters. Sometimes it is simply called a weir. There are two types of weirs: fixed weirs, which have no moving parts, and movable weirs, which have moving parts to control the flow of water. In addition, there are wash weirs that allow water to overflow the top of the weir.
Introduction to Damsbuttress dam
Buttress dams, also known as "support-wall dams," are dams that use concrete walls for support. There are only six such dams in Japan, and the Mitaki Dam (Tottori Prefecture), completed in 1937, was the last buttress dam in Japan. Because cement was an expensive material before World War II, buttress dams, which require less cement than gravity-type concrete dams, attracted attention and were constructed. However, as cement became less expensive, it was difficult to find engineers to work on the formwork, maintenance was not easy and costly, and there were durability problems.
"ta" column or row of the kana syllabarydam curry
Dam curry is a type of curry in which the roux is made to resemble a dam lake and the rice portion is made to resemble an embankment. Like real dams, there are gravity, arch, and fill types. Kurobe Dam Curry at the rest house of Kurobe Dam (0848-Kurobe Dam) has a long history, but it was Sanshuya in Honjo, Sumida-ku, Tokyo, that introduced it to the media and spread it in earnest. This has led to an increase in the number of restaurants selling dam curry in various areas of Japan, including as a way to revitalize their towns.
"ta" column or row of the kana syllabaryEntertainers, TV personalities, and celebrities who like dams
Entertainers who like dams are entertainers and celebrities who have publicly declared their love of dams on TV programs. Tamori, Ken (L'arc~en~Ciel), Tomoya Nagase (TOKIO), Takeshi Nadagi, Yoshizumi Ishihara, Saya, Motohiro Takewaka (Buffalo Goro), Yanagibuson (The Plan 9), Masaya Toriguchi, Kaoru Sakura, Tani+1, Nobu Nakajima, Ryoko Imamura
Introduction to Damsclass 2 river
Second Class Rivers are rivers other than First Class Rivers as defined by the River Law, which are administered by the prefectural government (governor). The term "second class" does not indicate the size of the river, such as width, etc. Therefore, a river may be a first class river even if its size is small, or a second class river even if its size is large.
"ta" column or row of the kana syllabarydam card
Dam cards are cards that the Ministry of Land, Infrastructure, Transport and Tourism and the Japan Water Agency began distributing in conjunction with the 2007 Forest and Lake Friendship Season event, mainly to raise awareness. Although they are the same size as so-called trading cards, they do not have a game element such as a match. Initially, dam cards were distributed only at dams managed by the Ministry of Land, Infrastructure, Transport and Tourism and the Japan Water Agency, but some prefectural dams have also begun to distribute the cards, and the number of dam cards is expanding.
"ta" column or row of the kana syllabaryconduit
A conduit is the channel from the overflow area downstream of the dam to the dam dam attenuator, and is used to ensure the proper flow of water from the flood discharge. There are several types of conduits, such as the levee downstream type often seen in gravity concrete dams, the chute type often seen in fill dams, and the tunnel type using tunnels.
"ta" column or row of the kana syllabaryTop (Crest)
The top end is the upper part of the dam embankment or levee. In many cases, dams dedicated to power generation are closed to the public, but in the case of multipurpose dams, the top of the dam may be open to visitors. Some multi-purpose dams open their topsides to visitors. In some cases, national highways are located above the topsides, and are referred to by enthusiasts as "national highways at the topsides. The width of the embankment is defined as 3 m or more based on the planned high water flow rate.
"ta" column or row of the kana syllabarytelemeter
A telemeter is [telemeter] a device that deciphers, indicates, or records measured quantities sent as electrical signals from a distant place (from Shinjirin Sanseido). Telemeters at dams mainly transmit measurement data from rain gauges and water level gauges to the management office. Based on the measured data, they are used for various gate operations and various warnings. Recently, there are also many cases where the measured data is distributed via the Internet.
"ta" column or row of the kana syllabaryBank length
The crest length is the length of the dam embankment (top). In the case of a fill dam, the concrete portion of the flood discharge is not included, but the crest length tends to be longer than that of a gravity concrete dam or an arch dam.
