2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 2:15 PM - 2:30 PM | NONSTATIONARITY IN LOW FLOWS AT SOUTHEAST U.S. STREAMFLOW GAGES | 410 B
NONSTATIONARITY IN LOW FLOWS AT SOUTHEAST U.S. STREAMFLOW GAGES
The southeast U.S. is widely perceived as a water rich region, yet recent droughts, highly variable streamflows, and rapidly growing demands for water have revealed vulnerabilities and the potential for widespread water scarcity. Recent studies have shown decreasing trends in low flows at many stream gages across the region, but have failed to identify the causal mechanisms underlying these trends. We describe low flow trend analyses of regional stream gage records in the southeast U.S. to assess water availability for multiple uses including agriculture, municipal, industrial, thermoelectric power production, and environmental flows. Statistical analyses, including the Mann-Kendall, Pettitt, and Ljung-Box tests are used to assess monotonic trends, the presence of abrupt shifts in data, and
autocorrelation, respectively. We compare our results with other studies assessing trends in low flows and perform type II error analysis to quantify the likelihood of erroneously declaring stationarity in low flows. Further, we present an investigation into potential drivers of trends in low flows across varying spatial and temporal scales and implications for future water availability in the region. Trends in streamflow reflect interactions among climatic and land use cycles, flow regulation, and groundwater withdrawals.
- Climate
- Landuse
- Management
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Presenters/Authors
Brian Bledsoe
(), University of Georgia, bbledsoe@uga.edu;
ASHA DISCLOSURE:
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Nonfinancial -
Timothy Stephens
(), University of Georgia, tas48127@uga.edu;
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Nonfinancial -