To formulate the long term solution for the flooding, drainage and stormwater management problems in the existing built-up areas in order to reduce the adverse effects of flooding on people and property and to protect the existing and proposed development by implementation of an integrated stormwater management by providing an  appropriate level of affordable flood protection to community expectations.

To optimise the effectiveness of the existing stormwater infrastructure network within the study area in a way thet meets the needs of the community and where possible, by providing and maintaining stormwater management infrastucture at an acceptable quality of service, taking into account environmental effects and public expectations.

To control the excessive sediment in watercourses to acceptable levels by managing the catchment activities using at source control measures to prevent any acceleration of the rate of erosion from construction site, upland and in stream channel.

Collect and  convey stormwater from a catchment to its receiving waters with minimal impact by managing and improving the quality of stormwater runoff from urbanized catchment and its pollution loads in order to reduce the adverse effects of contamination on the receiving water environment and by recommending ways to eliminate pollutions discharges to stromwater systems and receiving water.

To maximise on the opportunity of water resources conservation by stormwater runoff utilization as an alternative for non-potable water supply as a resource to reduce demand on other water resources, where feasible.

To protect and enhance the natural water-dependent ecosystems and enhance community accessibility to enjoy and appreciate watercourses environments, and to protect and maintain the rivers environments through environmental and aeshetic stormwater facilities/systems.??