Unit pits roofs crops India floods strain clothes toilets gardens Benefits reliance channels downpipes Gardening Mitigates later use Definition Irrigation Roof Gutters storage tanks heavy rainfall Roof Catchment rooftop surface Self-Sufficiency direct rainwater drinking purposes economical method building rooftops sustainable living water conservation groundwater levels Reducing Dependency Harvested rainwater conservation efforts sustainable practice Groundwater Recharge Allegiance Enterprise existing water resources following key components Urban Flooding Mitigation traditional water sources several essential purposes Allegiance Water Management Rooftop Rainwater Harvesting Rooftop Rain Water Harvesting Non-Potable Household Activities