It is a technique of increasing the recharge of groundwater by collecting and storing rainwater by constructing structures, such as dug wells, percolation pits and check dams. In most cases, the harvested water is usually redirected to storage tanks, cistern or reservoirs. First and foremost, the collection offers a better and efficient utilization of energy resource. It is important because potable water is usually not renewable.
The overall expenses used in setting up harvesting methods are much cheaper compared to other purifying or pumping means. Its maintenance is feasible on the economic front as it does not require deep pockets.
Harvesting allows the collection of large amounts of rainwater. Rainwater is usually free from harmful chemicals, which makes it ideal for irrigation purposes.
Another important advantage is that it reduces demand for potable water. It is important especially in areas with low water levels.
Rainwater harvesting, thus, is considered as a very reliable way to conserve water.