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沙坝
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The construction of dams is largely carried out by the local community. Costs mainly relate to local availability of cement, masonry and professional supervision.建坝主要是由当地社区实施的。成本主要取决于当地能否提供水泥、石工技术和专业监管。
<b>Cost of introduction:引进成本：</b>
* Material: US建材：US$ 5,500* Other costs: US其它成本：US$ 500* Labour: 劳动力： - skilled: US技术工：US$ 2,500 - unskilled: 900 man days 非技术工： 900人工日 -
<b>Cost of maintainance:维护成本：</b>
* Operation and maintenance: 5 days per year运行与维护：每年5天
The cost of a sand dam in Kenya was very low, yielding 2,844 m3 of water was US$3,260 = US$1.15 per m3 storage.在肯尼亚，沙坝的花销非常低廉，产出2844立方米的水需要3260美元，即每立方米储水需1.15美元。
The cost to benefit ratio for the sand dam's first year of operation is 1:12.沙坝第一年运作的成本效益比为1:12。
===Field experiences===
