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Investor Presentaiton

Change in Urban Water Balance The Natural versus Urban Water Balance: Precipitation = Evapotranspiration + Runoff + Recharge (interflow & deep ground water) The Water Balance changes when natural vegetated cover is replaced by suburban development. The actual percentages will vary from region to region, but the relationships are universal. 40% evapotranspiration 10% runoff 50% infiltration 35% evapotranspiration 30% runoff Natural Rainforest 0% impermeable 35% infiltration Natural rainforest Flooding in urban environment Residential 30%-50% impermeable Residential development 20% evapotranspiration 75% runoff 5% infiltration Commercial 70%-100% impermeable Commercial development

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