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Watershed Planning within a Quantitative Scenario Analysis Framework
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A planning algorithm for quantifying decentralised water management opportunities in urban environments.

Peter M Bach1, David T McCarthy, Christian Urich

  • 1MONASH Water for Liveability, Department of Civil Engineering, Monash University, Clayton 3800 VIC, Australia

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|November 5, 2013
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A new tool, DAnCE4Water, models urban changes to plan water infrastructure. It assesses decentralized stormwater management options, finding bioretention systems most versatile for resilient urban water management.

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Area of Science:

  • Environmental Engineering
  • Urban Planning
  • Water Resource Management

Background:

  • Global change presents challenges for urban water infrastructure resilience.
  • Strategic planning tools are needed to model urban and societal impacts on water systems.
  • Decentralized (distributed) water infrastructure offers potential solutions.

Purpose of the Study:

  • To present and test a novel algorithm for assessing decentralized stormwater management options within the DAnCE4Water planning tool.
  • To evaluate the performance of various stormwater technologies at different spatial scales.
  • To identify key parameters influencing the flexibility and effectiveness of the planning tool.

Main Methods:

  • Development of spatial representation algorithms based on planning rules.
  • Application of a multi-criteria assessment algorithm to identify top-ranking stormwater solutions.
  • Testing the model on a local Melbourne catchment using a toolbox of five stormwater technologies (infiltration systems, surface wetlands, bioretention systems, ponds, and swales).

Main Results:

  • The model successfully assesses numerous stormwater options to meet water quality targets.
  • Bioretention systems were identified as the most versatile technology ('utilisation' metric).
  • Results highlight the importance of spatial resolution and model flexibility for effective technology combinations.

Conclusions:

  • The DAnCE4Water tool provides a rigorous method for assessing decentralized stormwater management.
  • The generic nature of the model allows for application to diverse urban areas globally.
  • Optimizing spatial resolution and model flexibility is crucial for developing resilient urban water infrastructure.