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Water Portal / Rainwater Harvesting / Groundwater recharge / Permeable rock dams

179 bytes removed, 01:17, 1 May 2012

→‎Suitable conditions

* Slopes: Best below 2% for most effective water spreading.

* Topography: Wide, shallow valley beds.

~~The main limitation of permeable rock dams is that they are particularly site-specific, and require~~

~~considerable quantities of loose stone as well as the provision of transport.~~

This system is generally used across relatively wide and shallow valleys. This technology is appropriate for regions with less than 700 mm annual rainfall, where gullies are being formed in productive land. This is particularly suited to valley bottoms with slopes of less than 2%, and where a local supply of stones and the means to transport them is available.

Winona

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