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Due to the growing population and urbanization people are becoming more conscious about saving water. New and innovative methods are being used to suit the needs of the area. Some of the ancient methods of rain water harvesting are also being renovated.

A team of Professional Assistance for Development Action has found a simple solution named Jaldhar to harvest rain water and save paddy crops from frequent rain failures. This technique uses a portion of the farmland for rain water harvesting, by holding back rainwater in the land itself. There are two types of design depending on the type of land. One type of design is used for lands that have slope less than 2 percent while the other design is used for plots with slope between 2-8 percent. For land with slopes greater than 8 percent some modification might be required in the technology.

The five percent model follows the objective of ensuring that all the small land holdings should possess their own water body for harvesting rain. The pits occupy 5 percent area of individual fields and are usually 1.5 square meters in size. Water is allowed to accumulate to a height of 100mm by proper leveling and bunding of the plot. The pit helps the subsurface flow of water to downstream plots and increases the moisture regime of the complete area.

Jaldhar 30x40 technique is used in lands with an average slope of 3-5 percent. The upland areas are divided into small plots each consisting of a separate water collection pit. The pit is located at the lowest point of the plot and consists of 3-4 percent of an individual plot with a depth of 1m.

builders in Kerala are trying to ensure the installation of the best rain water harvesting method in their projects to help save maximum water.