Coastal Province - Engagement

Japanese: 沿岸州 - えんがんす
Coastal Province - Engagement

A long, narrow pile of sand or gravel that is separated from the coastline by a body of water. It is also called a coastal sand bar, coastal outer bar, or offshore bar. It is usually a long, narrow pile that runs parallel to the general direction of the coastline, but many are slightly curved in an arc. Coastal bars have gaps called tidal inlets in places, which allow the water of the bay or lagoon surrounded by the bar to be exchanged with the open ocean. Coastal bars are often formed on shallow coasts, and because they are sandy, they are prone to coastal erosion and the shoreline is prone to change. Coastal bars can be in a single row or in a group of several rows; the latter are wide and may have coastal dunes growing on top of them.

[Yoshinori Toyoshima]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

海岸線との間に水域を隔てて形成された細長い砂または礫(れき)の堆積(たいせき)地形をいう。沿岸砂州、海岸外州、沖州などとよばれる。通常は海岸線の一般方向に平行に細長く延びているが、多少円弧状に湾曲するものも多い。沿岸州は所々に潮流口とよぶ切れ目があって、内湾または州に囲まれた潟湖(せきこ)の水と外洋水とが交換することができる。沿岸州は遠浅の海岸に形成されることが多く、砂質であるため海岸侵食を受けやすく、汀線(ていせん)(海岸線)は変化しやすい。沿岸州には、1列のものと何列もの集合からなるものとがあり、後者の場合は幅が大きく、州の上には海岸砂丘が成長していることもある。

[豊島吉則]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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