Factors affecting rainwater harvesting
The various factors affecting rainwater harvesting are:
There are many names given to the water harvesting system, like:
In level terrain, the water harvesting structures are mainly crescent shaped earthen embankments or low, straight concrete and rubble “check dams” built across seasonally flooded gullies. Monsoon rains fill ponds behind the structures. Only the largest structures hold water year round; most dry up six months or less after the monsoons. Their main purpose, however, is not to hold surface water but to recharge the groundwater beneath.
The various advantages of water stored in the ground are as follows:
Disadvantages of Rainwater Harvesting
In urban areas (city areas), however, most of the ground is covered with buildings, concrete pavements and metalled roads due to which only very little rainwater seeps into the ground naturally.
The rainwater harvesting from open spaces around the buildings in a city is done by constructing percolation pits covered with concrete slabs having holes in them, and connected to a recharge well through a pipe.
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