Which technique is depicted in the below figure? Explain it in brief.
The technique shown here is ‘rooftop rainwater harvesting'.
In this system the rainwater is collected from the rooftop to a storage tank, through pipes. This water may contain soil from the roof and need filtration before it is used. Instead of collecting rainwater in the tank, the pipes can go directly into a pit in the ground. This then seeps into the soil to recharge or refill the ground water.
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