4.7 Article

Developing an integrated investment decision-support framework for water-sensitive urban design projects

Journal

JOURNAL OF HYDROLOGY
Volume 607, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.jhydrol.2022.127532

Keywords

Australia; Benefit transfer; Benefit; Cost Analysis; Economic analysis; Nature-based solutions; Non-market values; Water sensitive urban design

Funding

  1. Australian Research Council's Discovery Early Career Researcher Awards grant (ARC DECRA grant) [DE180101503]
  2. Cooperative Research Centre for Water Sensitive Cities (CRCWSC - IRP2)

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Traditional centralized water-management systems have limitations in delivering environmental and amenity benefits in urban areas. Water-sensitive urban design (WSUD) projects are proposed as an alternative solution, offering multiple benefits such as improving water quality, water supply, aesthetics, urban cooling, recreational spaces, and biodiversity habitat. However, low investment in such systems in most cities is attributed to the challenge of monetizing the multifunctional benefits of WSUD projects and including them in comprehensive economic analyses.
Traditional centralized water-management systems have tended to fall short in delivering environmental and amenity benefits in urban areas. Water-sensitive urban design (WSUD) projects have been proposed as an alternative due to their ability to generate multiple benefits, including improving water quality, water supply, aesthetics, urban cooling, spaces for recreation, and habitat for biodiversity. However, in most cities, investment in such systems has been relatively low, in part due to the difficulty of monetizing the multifunctional benefits of WSUD projects and including them in comprehensive economic analyses. We describe the development, testing and application of INFFEWS (Investment Framework For the Economics of Water Sensitive cities), an economic decision-support system for investment in WSUD projects. INFFEWS is based on a Benefit: Cost Analysis (BCA) framework and is consistent with standard BCA. A prominent feature of the framework is its strong emphasis on quantifying the monetary-equivalent values of intangible (non-market) benefits from WSUD projects. Development of the tools and their supporting materials has involved extensive consultation with intended users, review of existing tools, and primary research over eight years (2013-2020). The frameworks can be applied to businesscase development and decision making at multiple levels in public-sector and private-sector organisations.

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