Georgia State University ScholarWorks @ Georgia State University Geosciences Theses Department of Geosciences 1-6-2017 Land Cover Change Impacts on Multidecadal Streamflow in Metropolitan Atlanta GA, USA T. Chee Hill Follow this and additional works at: https://scholarworks.gsu.edu/geosciences_theses Recommended Citation Hill, T. Chee, "Land Cover Change Impacts on Multidecadal Streamflow in Metropolitan Atlanta GA, USA." Thesis, Georgia State University, 2017. https://scholarworks.gsu.edu/geosciences_theses/98 This Thesis is brought to you for free and open access by the Department of Geosciences at ScholarWorks @ Georgia State University. It has been accepted for inclusion in Geosciences Theses by an authorized administrator of ScholarWorks @ Georgia State University. For more information, please contact
[email protected]. LAND COVER CHANGE IMPACTS ON MULTIDECADAL STREAMFLOW IN METROPOLITAN ATLANTA, GA USA by TIFFANNIE CHEE HILL Under the Direction of Jeremy E. Diem, PhD ABSTRACT Urbanization has been associated with the degradation of streams, and a consequence of forest to urban land transition is a change in streamflow. Therefore, the purpose of this thesis is to examine the impacts of land-cover change in ten different watersheds in the rapidly urbanizing Atlanta, GA USA metropolitan area. Streamflow and precipitation data for a 30-year period (1986-2016) were analyzed in conjunction with land cover data from 1992, 2001, and 2011. Big Creek and Suwanee Creek experienced the most urbanization and increases (20%) in streamflow and runoff, and high flow (>95th percentile of flow) days doubled and increased 85%, respectively. Precipitation-adjusted streamflow for Peachtree Creek and Flint River decreased about 17%. Runoff ratios for South River were the highest among all watersheds, even the Etowah River, which remained moderately forested and had the most precipitation and slope.