Mail id home use dry spells best method various uses Small Places broader scale storage vessels ancient practice livestock watering groundwater levels water-scarce areas strategic approach Government factors efficient water use Rainwater collection sustainable solution Rainwater Harvesting Allegiance Enterprise mere water collection environmental footprint crucial natural resource Allegiance Water Mangement supplementary water source overburdened water systems Allegiance Water Management water management challenges Ground Water Level Increase Rain Water Harvesting Expert Rain Water Harvesting School Landscape irrigation Wildlife sustainable development principles Rooftop water harvesting Water catchment Stormwater control Fire protection Synonyms