Question

What is rain harvesting state the objectives of rain harvesting?

Answer 1

Rain water harvesting is a technique of collection and storage of rainwater into natural reservoirs or tanks, or the infiltration of surface water into subsurface aquifers (before it is lost as surface runoff). One method of rainwater harvesting is rooftop harvesting.

                     Objectives:Increase Available Water During Dry Season

Many ecosystems have wet and dry seasons. Because the dry seasons can consist of weeks or months of little to no rain, it is important to capture during the rainy season and have it available for use during the dry season. Rainwater harvesting enables you to store rain when it is prevalent to be used when there is no rain.

Reduce Flooding and Erosion

By capturing and storing large amounts of rainwater in reservoirs, it is possible to reduce the amount of runoff and limit the impact on the land of large rainfalls. By capturing rainwater you are basically reducing the amount of water that is flowing across the land, which reduces flooding chances and the impact of erosion.

Prevent Overuse of Aquifers

As cities and towns grow the need for water increases. Many municipalities rely upon aquifers deep below the ground for this water supply. The problem is it takes a long time to replenish an aquifer if it is quickly drained. By harvesting rainwater for later use, the demand on aquifers is reduced, which enables them to remain full.

Answer 2

Rain Water Harvesting and it's objectives.

Explanation:

Rainwater harvesting is a technique used for the purpose of using water for future use (eg agriculture etc.), is a process of conserving and collecting rainwater by using different means of different resources.

Rainwater can be collected in natural reservoirs or artificial tanks. The second way is to collect surface water infiltration from the subsurface sedimentary rock layer before the surface is filled to the brim.

Objectives of Rain Water Harvesting -

(1) Storing water for future use, when needed.

(2) Increase the crop production and cultivation, by supplying enough water in unsuitable climates like extreme summer.

(3) Avoid shortage of water in rural as well as urban areas.

In general, to save and store water is what rain water harvesting keep an objective of.