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沙坝
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====取水====
[[Image:Sand dam scoop hole.JPG|thumb|right|200px|运用勺洞法从河床取地下水。肯尼亚基图伊区。来源: [http://www.sswm.info/category/implementation-tools/water-sources/hardware/precipitation-harvesting/sand-dams HOOGMOED (2007).]]]
如果及时维护,所需的维护成本并不会很高。然而即使是沙坝出现小故障,也能导致整座沙坝遭到毁坏。因此需要定期检查沙坝有无裂缝和损坏。尤其是在洪水过后,以及极端气温变化之下,沙坝很可能产生裂缝。这些裂缝需由熟练的石匠进行修复,越及时越好。在旱季,如果水库是满的,则已提高的沙坝需要再提升到最高50厘米的范围内。
Maintenance can normally be carried out by the users of the system or by a caretaker or watchman. Larger repairs may require skilled labour, which can usually be provided by local craftsmen. In some cases, unskilled labour may be required on a large scale (e.g. for repairing a broken raised-sand dam, or a leaking subsurface dam). The labour may be provided by the users (with or without pay), or by other people who are hired for the purpose.一般可以由沙坝系统使用者、管理员或看守人来实施维护工作。较大的修补工作可能需要技术娴熟的工人来进行,通常可以找当地的工匠。有些情况下,大规模的修补也会需要非技术工人(如,修补已提高过的故障沙坝,或渗漏的地下水坝)。可以由沙坝使用者提供劳动力(有或没有薪酬),或雇佣其他人来修补。