Low-Flow, Base-Flow, and Mean-Flow Regression Equations for Pennsylvania Streams
Low-Flow, Base-Flow, and Mean-Flow Regression Equations for Pennsylvania Streams By Marla H. Stuckey In cooperation with the Pennsylvania Department of Environmental Protection Scientific Investigations Report 2006-5130 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey P. Patrick Leahy, Acting Director U.S. Geological Survey, Reston, Virginia: 2006 For sale by U.S. Geological Survey, Information Services Box 25286, Denver Federal Center Denver, CO 80225 For more information about the USGS and its products: Telephone: 1-888-ASK-USGS World Wide Web: http://www.usgs.gov/ Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to repro- duce any copyrighted materials contained within this report. Suggested citation: Stuckey, M.H., 2006, Low-flow, base-flow, and mean-flow regression equations for Pennsylvania streams: U.S. Geo- logical Survey Scientific Investigations Report 2006-5130, 84 p. iii Contents Abstract. 1 Introduction . 1 Purpose and Scope . 2 Previous Investigations . 2 Physiography and Drainage. 2 Development of Regression Equations . 2 Streamflow-Gaging Stations . 2 Basin Characteristics . 5 Regression Techniques . 5 Low-Flow Regression Equations. 6 Base-Flow Regression Equations. 10 Mean-Flow Regression Equations. 13 Limitations of Regression Equations . 15 Summary . 15 Acknowledgments . 17 References Cited. 17 Appendixes . 19 1. Streamflow-gaging stations used in development of low-flow, base-flow, and mean-flow regression equations for Pennsylvania streams.
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