離水海岸(英語:emergence coast),指沿海陸地上升或海平面下降的海岸。在沙岸地區,由於離水作用,沿海的淺水區露出海面,故海岸範圍甚為寬廣;而近岸的沙堤也因離水而成沙洲,如臺灣西南海岸。在岩岸地區,原本在海蝕的海蝕平台,由於離水作用,上升成為海階,如臺灣東部東河至臺東的海岸。

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