The term water harvesting, particularly rainwater harvesting, has been used for centuries. Rain-water harvesting is generally described as the conscious collection and storage of rainwater to meet the demands of water for drinking and domestic irrigation. Water is harvested for a variety of purposes. One is to halt the gradual decline in water availability and to amplify the abundance of water resources already available. Another potential use of water harvesting is to reduce the effects of soil erosion and to inculcate a culture of water conservation. The importance of rainwater harvesting needs no words. In the present scenario of finite fresh water resources, it has become indispensable to manage and distribute water so that everyone has access to this precious resource. Community participation and traditional water harvesting systems throughout the country have augmented the already available sources of water and thereby have mitigated the water crisis to some extent. However, more needs to be done when it comes to harvesting water. This is due to the fact that humanity has been increasing in numbers significantly and this has brought about a need for more agriculture. Agriculture is the biggest user of water, far exceeding what a population uses on a daily basis for their general needs such as drinking, washing and bathing.