Water

Rainwater Harvesting: Benefits of Rainwater Harvesting

Water on earth remains constant. Several factors such as industrial development and extensive irrigated agriculture together with the rapid population growth are putting a huge stress on the natural ecosystems. Hence, it is important to preserve and sensibly use natural resources. Rain water harvesting (RHW) is the technique of collecting and purifying the pristine rainwater. Read on to know more about the benefits of rainwater harvesting.

Rainwater harvesting has two main classes:

  1. systems that collect rainwater on the roof for household purposes
  2. systems that harvest rainwater in field or adjoining catchment to supplement irrigation for agriculture

Benefits of Rainwater Harvesting

Some of the benefits of rainwater harvesting are mentioned below:

  • ideal solution to water shortage problems in those areas which face inadequate water resources
  • rise in the ground water
  • minimizes the effects of drought
  • achieves drought proofing
  • minimizes the runoff which blocks the storm water drains
  • reduces flooding of roads
  • improves the water quality
  • reduces soil erosion
  • saves energy per well required for lifting ground water
  • prevents sea water ingress
  • lower water supply cost
  • improvement in plant growth

Rainwater harvesting is most suitable for those places where:

  • ground water is scarce
  • terrain is rugged
  • ground water is contaminated
  • flooding and seismic events frequently occur
  • low population density
  • water is rich in minerals or too hard
  • conservation is an objective

Some of the qualitative advantages of rainwater harvesting are:

  • naturally pure
  • naturally soft as no dissolved minerals present
  • sustainable
  • chloride-free
  • pesticide-free

Rainwater Harvesting Techniques

A new concept of rainwater harvesting is recharge of ground water. Some of the structures that are generally used are mentioned below:

  • pits recharge
  • trenches
  • dug wells
  • hand pumps
  • recharge shafts
  • spreading techniques

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