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Rainwater for household open wells

Time immemorial open wells constitute the most common source of drinking water in peri-urban and rural areas. In most open wells located along developing country coastal margins, water quality is under threat from rising salinity issues. Also across non coastal areas, high level of dissolved solids and is effecting drinking water availability.
 
Feeding rainwater directly into open wells (coined as "backwashing" since the process results in reverse flow of water) is a ground water exchange process whereby quality of the ground water is improved through diffusion process. This involves collection of rainwater from rooftops and feeding directly to the wells. The interim results indicate substantial reduction in Total Dissolved Solids (TDS) level. 

This process enables a speedier measure for replacing existing contaminated ground water with soft rainwater. Once the water column in the wells is filled, the excess rainwater slowly seeps into the surrounding aquifer. Thus continuous backwashing enables exchange of contaminated hard water with soft rainwater.

  The process is a simple technique, which involves collection of rainwater from rooftops and feeding directly to the wells. The rise in water level causes seepage into the surrounding aquifer thus replacing the existing high dissolved solids contained water with soft rainwater.

This results in reverse flow of water concentrically resulting in diffusion and cleansing action.

Well recharging or Backwashing is a ground water exchange process whereby quality of the ground water is improved through diffusion process. Over a continuous period, the excess accumulation of chemical and other contaminants will decline, thus improving the water quality.

The material used for installation comprises of locally available PVC pipes and gutters and can be easily fixed with minimum skills of a local plumber.

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