Explain how rainwater harvesting can help in water conservation.

Hint:Water conservation is the process by which one uses water efficiently and avoids unnecessary wastage of water.

Complete answer
Let's first understand what rain water harvesting is. It is the process of collecting, storing and purifying rainwater. There are various steps involved in collection of rainwater harvesting.

i) The water is first collected in a catchment
ii) Using a conveyance system it is then transported from catchment
iii) The water is then filtered in order to remove the possible pollutants
iv) The filtered water is then stored in tanks for future use

The advantages of rain water harvesting are as follows
i) It helps in improving both the quantity and quality of ground water
ii) It is cost effective as it helps in reducing water bills
iii) It helps in promoting water conservation
iv) The water can be readily used for watering plants and crops
v) It prevents soil erosion, flooding, etc
vi) The water once filtered, can also be used for drinking purposes

These are the ways through which rainwater harvesting can help in water conservation.

Note:The disadvantage of rain water harvesting are - it requires regular maintenance and if the water is not stored and collected properly it can become a breeding ground for mosquitoes. Also, if there is no rainfall or less rainfall, the collection of water becomes limited.