Attachment C - Stormwater Mangement Plan

      systems to remove pollutants. WSUD also provides the opportunity to achieve
      multiple benefits though sustainable urban water management.
      The use of WSUD principles into new developments helps to protect and
      enhance natural water systems within urban environments by utilising different
      ideas, including:
             Integrating stormwater treatment into the landscape, maximising the
              visual and recreational amenity of developments.
             Improving the quality of water draining from developments into receiving
              environments.
             Reducing runoff and peak flows from rural developments by increasing
              local detention times and minimising impervious areas.
             Minimising drainage infrastructure costs of development due to reduced
              runoff and peak flows.

      3. Why use Water Sensitive Urban Design?

      Stormwater is the water that runs off our urban surfaces following rainfall
      events. It has been identified as a key cause of pollution and declining health
      of our waterways. With increased development, the proportion of impervious
      surfaces in our catchments increases. This increases the velocity and amount
      of water running into our waterways, creating problems of erosion (including
      sediment control) and flooding and changing natural flow regimes, with
      associated ecological damage. It also washes more pollutants into our streams
      and rivers, resulting in a degradation of our river health.
      WSUD has been identified as a means to control flows and filter stormwater to
      remove pollutants. It offers the potential to reduce the costs, infrastructure
      sizing and occupied land area associated with conventional drainage
      approaches whilst treating runoff closer to its source. This more effectively
      mimics a natural system and, as treatment can be located further upstream
      than for conventional approaches, is efficient by providing flow-on effects that
      benefit the entire catchment. WSUD is also an important component of
      integrated water management, and can contribute to multiple benefits such as
      enhancing liveability.

      4. Proposed Nature Based Stormwater Capture/Re-use then Local Landscaping
         Irrigation to Natural Overland Flows for any un-used component.

      All stormwater flowing from Buildings will be harvested into local rainwater tanks
      for re-use. Any overflow from these tanks will flow into a Vegetated Infiltration
      & Level Spreader Swales, which will form part of the designed landscape
      vegetation to beautify the development and helping provide the Nature Based


Revision: B – 2nd August 2021
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