Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020)
Dates
Publication Date
2019-10-24
Start Date
1787
End Date
2015
Revision
2020-09-02
Citation
Roland, M.A., Stuckey, M.H., and Gross, E.L. 2019, Data in Support of Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania (ver. 2.0, August 2020): U.S. Geological Survey data release, https://doi.org/10.5066/P9YHIU6G.
Summary
Regression equations, which may be used to estimate flood flows at select annual exceedance probabilities, were developed for ungaged streams in Pennsylvania. The equations were developed using annual peak flow data through water year 2015 and basin characteristics for 285 streamflow gaging stations across Pennsylvania and surrounding states. The streamgages included active and discontinued continuous-record stations, as well as crest-stage partial-record stations, and required a minimum of 10 years of annual peak streamflow data for inclusion in the study. Explanatory variables significant at the 95-percent confidence level for one or more regression equations included the following basin characteristics: drainage area, maximum basin [...]
Summary
Regression equations, which may be used to estimate flood flows at select annual exceedance probabilities, were developed for ungaged streams in Pennsylvania. The equations were developed using annual peak flow data through water year 2015 and basin characteristics for 285 streamflow gaging stations across Pennsylvania and surrounding states. The streamgages included active and discontinued continuous-record stations, as well as crest-stage partial-record stations, and required a minimum of 10 years of annual peak streamflow data for inclusion in the study. Explanatory variables significant at the 95-percent confidence level for one or more regression equations included the following basin characteristics: drainage area, maximum basin elevation, mean basin slope, percent storage, and the percentage of carbonate bedrock within a basin. The State was divided into five regions, and regional regression equations were developed to estimate flood flows associated with the 50-, 20-, 10-, 4-, 2-, 1-, 0.5-, and 0.2-percent annual exceedance probabilities (which correspond to the 2-, 5-, 10-, 25-, 50-, 100-, 200-, and 500-year recurrence intervals, respectively). Although the regression equations can be used to estimate the magnitude of flood flows for most streams in the State, they are not valid for streams with drainage areas generally greater than 1,500 square miles or with substantial regulation, diversion, or mining activity within the basin. The regional regression equations will be incorporated into the U.S. Geological Survey StreamStats application (https://water.usgs.gov/osw/streamstats/).
Additionally, annual peak flow data for 356 streamgages initially considered for inclusion in the analysis for development of updated flood-flow regression equations were analyzed for the existence of trends; estimates of flood-flow magnitude and frequency were also computed for these streamgages. Estimates of flood-flow magnitude and frequency for streamgages substantially affected by upstream regulation are also presented.
The data release contains PeakFQ input and output files (.psf, .txt, .prt) for select regulated (non-reference) and unregulated (reference) streamgages in Pennsylvania and border areas of adjacent states. The version 2.0 revision includes a dataset representing the five regions across Pennsylvania related to the estimation of flood flows by means of regression equations at ungaged streams not subject to substantial flow regulation, diversion, or mining activity.
NOTE: The previous version is available from the author; all of the data in the previous version can be found in version 2.0.
First Posted - 2019 (available from author)
Revised - August 2020 (version 2.0)
Click on title to download individual files attached to this item.
Ver2.0_Metadata.xml Original FGDC Metadata
View
11.77 KB
application/fgdc+xml
Regression Equations ver2.0.txt
783 Bytes
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FF_RegressionEquations.zip
1.09 MB
application/zip
PASS_FFRegions_2020_07_09.zip
1.84 MB
application/zip
Related External Resources
Type: Related Primary Publication
Roland, M.A., and Stuckey, M.H., 2019, Development of Regression Equations for the Estimation of Flood Flows at Ungaged Streams in Pennsylvania: U.S. Geological Survey Scientific Investigations Report 2019-5094, 36 p.
Flood frequency analyses based on data collected at U.S. Geological Survey streamgages are undertaken to estimate the frequency at which floods of specified magnitudes are typically exceeded. These estimates are used for activities such as infrastructure design, flood risk assessment and planning, and development of flood insurance rate maps. Input data files are used to compute flood frequency estimates based on methods described in Bulletin 17C (England and others, 2018).
Revision 2.0 by Linda Zarr on September 2, 2020. To review the changes that were made, see “Regression Equations ver2.0.txt” in the attached files section.
