Floods in Pennsylvania, frequency and magnitude

Open-File Report 61-28
By:  and 



This report outlines a method of determining the magnitude of floods having frequencies up to 50 years for any stream in Pennsylvania except regulated streams and streams whose drainage basins are smaller than 10 square miles. On the main stems of the Schuylkill, Delaware, Susquehanna, and Chemung Rivers the magnitude of floods can be determined for frequencies up to 100 years.

Six composite frequency curves show the relation of the mean annual flood to floods having recurrence interval up to 50 to 100 years. Curves for fourteen hydrologic areas show the variation of mean annual flood with drainage area. This report explains how to select the proper curves for any chosen point in the State and how to compute a flood-frequency curve for that point.

A tabulation of peak gage heights and discharges for most gaging stations in the State is included. In general, the tabulations contain all peaks above a specific base discharge, although for some stations only annual peaks are shown.

Study Area

Publication type Report
Publication Subtype USGS Numbered Series
Title Floods in Pennsylvania, frequency and magnitude
Series title Open-File Report
Series number 61-28
DOI 10.3133/ofr6128
Year Published 1961
Language English
Publisher U.S. Geological Survey
Publisher location Harrisburg, PA
Contributing office(s) Pennsylvania Water Science Center
Description Report: v, 231 p.; 2 Sheets: 15.86 x 9.71 inches and 16.10 x 9.63 inches
Country United States
State Pennsylvania
Online Only (Y/N) N
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details