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Water Portal / Rainwater Harvesting / Groundwater recharge / Tube recharge

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[[Image:tube recharge icon.png|right|80px]]

[[Image:TubeRechargeDrilling.jpg|thumb|right|200px| Making a borehole for the tube recharge system with a step Auger in Chimoio Mozambique, June 2006. Photo: Arrakis.]]

[[Image:TubeRecharge.jpg|thumb|right|200px| Tube recharge. Photo: H. Holtslag, DAPP Zimbabwe.]]

__NOTOC__ <small-title />'''Tube recharge ''' is a low cost technology that combines manually filled holes with drainage tubes that pass through the compacted topsoil layer. Rainwater that normally evaporates or runs off into rivers now penetrates into the ground and replenishes aquifers.

The tube recharge system consists of a plastic hose or PVC tube with a diameter of 20-30 mm. These tubes are placed in manually drilled holes, upstream of a production well and at a location where water collects naturally or in an artificially constructed pond. When the pond is filled up after the rain, some hours must pass before opening the drainage tube, in order to settle the dirt. Before the water enters the tube, it is filtered by a filter tube. The length of the tube is 5 to 10 m, depending on the size of the compact topsoil. They do not go into the aquifer itself.

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