Figure 1: Change in surface water runoff due to site development Careful planning of stormwater management can reduce the pressure on council stormwater systems, reduce flooding risks, protect the environment from contamination and cut water use in a household. This article by BRANZ explains how. Stormwater must be managed to minimise the risk of flooding. But allowing all stormwater from a property to run into drains not only wastes a potential source of garden water; it als