Graduate Project
 

Adopting existing stormwater infrastructure to meet urbanization and changing rainfall trends : a case study of library pond in Wilsonville, Oregon

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https://ir.library.oregonstate.edu/concern/graduate_projects/5m60r1044

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  • The City of Wilsonville, Oregon (City) located between Portland and Salem on Interstate-5 was historically a small farming community that has grown into a thriving city. The development required to meet the population growth and diverse industries of the area has led to increased development and urbanization. These changes in combination with shifting precipitation patterns due to climate change has resulted in flooding events throughout the City. This case study is an exploration of possible retrofit opportunities for the Library Pond stormwater detention facility to best meet existing and future conditions. A series of scenarios explore pre-development, existing, and future development land use, incorporating the best management practice (BMP) Sizing Tool. This tool addresses impact from altered natural hydrologic patterns and processes (hydromodification) and complies with peak flow control and peak flow duration-matching. The findings from this study reveal that the existing Library Pond configuration is not in compliance with the current City stormwater design standards; discharge flows will need to be redirected from approximately 38 percent of the total impervious areas; and that retrofitting the pond is essential to meeting stormwater best management practice.
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