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沙坝
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09:31, 14 November 2015
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通常而言,沙坝需要建在丘陵地带中的砂质河床上。河床最好有不透水的基岩,上面铺有粗砂。河流需是季节性的,但必须有基本流量。要判断河流是否符合上述条件,可以观察生长在河边的植被种类。河流不能太宽(最宽25米),两边需要有较高的河堤。
请确保把沙坝建在河水会流经坝体的区域,两边河堤要等高,高度要足够(坝高
请确保将坝建在河流会经过坝体的区域,两边河堤要等高,高度要足够(坝高
+洪水水位+10%),且不要把沙坝建在河流弯道附近。
以下选址能防止漏水:
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