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Submersion (coastal management)
Submersion is the sustainable cyclic portion of coastal erosion where coastal sediments move from the visible portion of a beach to the submerged nearshore region, and later return to the original visible portion of the beach. The recovery portion of the sustainable cycle of sediment behaviour is (accretion).
==Submersion vs erosion==
The sediment that is submerged during rough weather forms landforms including storm bars. In calmer weather waves return sediment to the visible part of the beach. Due to longshore drift some sediment can end up further along the beach from where it started. Often coastal areas have developed sustainable coastal positions where the sediment moving off beaches is sustainable submersion. Unfortunately, for many inhabited coastlines, anthropogenic interference in coastal processes has meant that erosion is often more permanent than submersion.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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