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漏水坝

7 bytes removed, 06:02, 20 May 2015
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| valign="top" | - 会被淤泥堵塞,需要定期维护 <br>
- 与拦沙坝遇到的问题类似,土地使用权的不明确可能引起漏水坝的所有权问题 <br>
- Can be expensive: a 5-step dam, 4可能会很昂贵:一座4.9 metres high, costs around $26,000 to construct 9米高的5阶水坝造价在26000美元左右 <br>
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