back-up sand 中文意思是什麼
back-up sand
解釋
背砂-
The six sea walls constructed in xiamen seacoast from 1953 to 1979 not only changed original nature environment, but also produced many application quaternary problems : tide - absorbing capacity reducing, and the bay silt up increasing ; the coast erode going into worse, and part of coasts collapsing and falling back ; intertidal zone mangrove disappearing, and ecosystem environment being destroyed ; sand beach in seashore running off severely, quantity of sea water falling, and marine products being reduced sharply
摘要1953 - 1979年廈門沿海修築的6條海堤不僅改變了原有的良好自然環境,而且產生了諸多應用第四紀問題:納潮量減少,港灣淤積加重;海岸侵蝕作用加劇,部分海岸崩塌後退;潮間帶紅樹林消失,生態環境遭到破壞;海濱沙灘流失嚴重,海水質量下降,水產養殖銳減。
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