Hydrological Evaluation Of Green Stormwater Infrastructure Implementation In Semi-Arid Nested Catchments
Presenter: Neha Gupta1
Co-Author(s): Yoga Korgaonkar, David Dziubanksi, Erika Gallo
Advisor(s): Dr. Tom Meixner
1Department of Hydrology and Atmospheric Sciences, University of Arizona
Semi-arid cities such as Tucson, Arizona are implementing solutions that capture rainwater as it falls and flows through the streets as stormwater, approaches that are collectively captured in the term green stormwater infrastructure. In the City of Tucson, green infrastructure is implemented in a decentralized manner throughout the streets of neighborhoods to reduce flooding impacts, support local plant life, and address urban heat island impacts. Taking advantage of the City of Tucson, Arizona as a living laboratory, this observational study assesses the cumulative impact of green infrastructure installation in neighborhood streets on stormwater runoff characteristics (runoff depth, peak discharge, runoff ratio) under seasonal conditions. This observational study includes the development and analysis of high-resolution empirical runoff datasets derived on scales typically underrepresented in data-limited semi-arid urban environments, and discusses methods and analyses undertaken in order to characterize urban hydrologic functioning at the urban subwatershed scale via runoff comparisons that were evaluated using a paired, nested watershed approach.