World Environmental and Water Resources Congress 2019
Relationship between Ocean-Atmospheric Variability and Regional Baseflow of the Continental United States
Publication: World Environmental and Water Resources Congress 2019: Groundwater, Sustainability, Hydro-Climate/Climate Change, and Environmental Engineering
ABSTRACT
Historically, water quality analysis and water management planning have been dependent on accurate assessment of baseflows. Understanding the relationship between oceanic-atmospheric variability and baseflow changes in the continental United States that is beneficial for water resources management is the focus of this study. Baseflows obtained from unimpaired daily streamflows at 574 stations in the United States for a 44-year period from 1970 through 2013 are used in this study. Temporal windows that coincide with the phases of North Atlantic oscillation (NAO) and El Niño-Southern Oscillation (ENSO), are used to evaluated changes in the baseflow extremes and characteristics. Statistically significant changes are evaluated using a non-parametric rank-sum test. Based on a preliminary analysis of results obtained nonparametric tests indicate the spatially varying influence of ENSO and NAO on baseflow in the United States. The warm phase of the NAO has contributed to higher median baseflow in the Souris Red Rainy, Upper Mississippi, Arkansas-White-Red, and Missouri Basin, but the cold phase of ENSO isconnected with higher median baseflow in these regions. The warm phase of the NAO and the cold phase of the ENSO are associated with higher median baseflow in the northwest region of the United States. Improved knowledge of oceanic-atmospheric variables with regional baseflow variability may help in baseflow prediction studies and regional water quality management.
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Information & Authors
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Published In
World Environmental and Water Resources Congress 2019: Groundwater, Sustainability, Hydro-Climate/Climate Change, and Environmental Engineering
Pages: 296 - 302
Editors: Gregory F. Scott and William Hamilton, Ph.D.
ISBN (Online): 978-0-7844-8234-6
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: May 16, 2019
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