urban areas gujarat due important city residential complexes older buildings rural areas sustainable future flood risks dry spells depleted aquifers reducing reliance waterscarce areas taluka initiatives offers subsidies semiarid climate encourages people municipal corporation nonpotable purposes citys focus reducing dependency crucial role essential technique semiurban areas western india residential commercial install systems promote rwh rwh plays implemented rwh rainwater harvesting storing water water conservation rwh systems sewerage board gwssb gujarat government mandates saurashtra promotes rwh rainwater harvesting solutions government buildings schools rwh systems benefits commercial rwh installations utilizing collected rainwater commercial properties district conventional water sources improving water availability acute water scarcity combat water scarcity address water scarcity kutch offer incentives kutch district deals bhuj bhuj located groundwater recharge vadodara