This article explains about rainwater harvesting and how it is used to help supply people with extra water for indoor or outdoor use.
Rainwater harvesting is the process of collecting rainwater from the roofs of houses to be used in residences or for irrigation purposes. There are many systems that can be used to collect, filter and store this water for later use. Some states in the US offer tax credits for installing these systems and in certain places around the world these systems are required for new construction homes.
When the rainwater is used for human consumption, the first water to arrive in the system is rejected. This is because this water acts as a roof washer which cleans off the debris. This is not required for irrigation purposes but a prefilter is still useful to help prevent sedimentation buildup.
Article Link: http://rainwater.sustainablesources.com/
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