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Going green? Ex-post valuation of a multipurpose water infrastructure in Northern Italy

Arnaud Reynaud, Denis Lanzanova, Camino Liquete and Bruna Grizzetti

Ecosystem Services, 2017, vol. 27, issue PA, 70-81

Abstract: A contingent valuation approach is used to estimate how households value different multipurpose infrastructures (conventional or green) for managing flood risk and water pollution. As a case study we consider the Gorla Maggiore water park located in the Lombardy Region, in Northern Italy. The park is a neo-ecosystem including an infrastructure to treat waste water and store excess rain water, built in 2011 on the shore of the Olona River in an area previously used for poplar plantation. This park is the first one of this type built in Italy. A novel aspect of our research is that it not only considers the values people hold for different water ecosystem services (pollution removal, recreative use, wildlife support, flood risk reduction), but also their preferences for how those outcomes are achieved (through conventional or green infrastructures). The results indicate that the type of infrastructure delivering the ecosystem services does have an impact on individuals’ preferences for freshwater ecosystem services. Households are willing to pay from 6.3 to 7.1euros per year for a green infrastructure (compared to a conventional one), with a premium up to 16.5euros for a surrounding made of a park. By considering the type of infrastructure within the choice model, we gain a richer understanding of the relationship between social welfare and freshwater ecosystem services.

Keywords: Ecosystem services; Green infrastructure; Nature-based solution; Economics; Contingent valuation (search for similar items in EconPapers)
Date: 2017
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