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Flow Statistic Data for Pennsylvania Streams

A series of updates of previously published peak-flow, low-flow, and mean-flow statistics as well as the development of new base-flow statistics has created the need to visit multiple web pages, applications, or reports to gather results from the most recent statistical analyses. This web page ensures that users of Pennsylvania streamflow statistics have access to the most current statistics and analyses. Links are provided to the most up-to-date flow statistics as determined from data collected at USGS streamgaging stations located on Pennsylvania streams or from regional regression equations developed using the same streamflow data.

In the following list of sources of current streamflow statistics, the term unregulated means no significant flow-altering impoundment or reservoir is located upstream of the data-collection location.

The most-current methods and results of statistical analyses for Peak-Flow Statistics are described in Regression Equations for Estimating Flood Flows at Selected Recurrence Intervals for Ungaged Streams in Pennsylvania, USGS Scientific Investigations Report 2008-5102 by Roland and Stuckey.

The most-current methods and results of statistical analyses for Low-Flow, Base-Flow, and Mean-Flow Statistics from unregulated streams are described in Low-Flow, Base-Flow, and Mean-Flow Regression Equations for Pennsylvania Streams, USGS Scientific Investigations Report 2006-5130 by Stuckey.

The most-current methods and results of statistical analyses for Low-Flow Statistics from regulated streams are described in Comparison of Methods for Computing Streamflow Statistics for Pennsylvania Streams, USGS Water Resources Investigations Report 99-4068 by Ehlke and Reed.

Current Sources of Pennsylvania Streamflow Statistic Data

If you are interested in:

• Peak-Flow Statistics
  
  (Regression equations for peak flow statistics were recently updated. The results are available in a USGS report (USGS SIR 2008-5102) and will be available in the near future in the USGS StreamStats web application.)
  
  
  • at a streamgaging station located on an unregulated stream (USGS SIR 2008-5102, Appendix 2)
  • at an ungaged location on an unregulated stream (USGS SIR 2008-5102, regression equations)
  • at selected streamgaging stations located on regulated streams (USGS SIR 2008-5102, Appendix 3)
    
    
• Low-Flow Statistics
  
  • at a streamgaging station on an unregulated stream (USGS SIR 2006-5130, Appendix 4)
  • at an ungaged reach on an unregulated stream (USGS StreamStats web application)
  • at an ungaged reach on an unregulated stream that exceeds the suggested limits of regression equations presented in StreamStats web page (USGS-PA Low-flow Statistics web application)
  • at selected streamgaging stations on regulated streams (USGS WRIR 99-4068, Appendix 1)
    
    
• Base-Flow and Mean-Flow Statistics
  
  • at a streamgaging station on an unregulated stream (USGS SIR 2006-5130, Appendix 5)
  • at an ungaged reach on an unregulated stream (USGS StreamStats web application)
    
    
• Mean-Flow Statistics:
  
• at selected streamgaging stations on regulated streams (USGS WRIR 99-4068, Appendix 1)