By Glenn A. Hodgkins, Gregory J. Stewart, Timothy A. Cohn, and Robert W. Dudley
U.S. Geological Survey Open-File Report 2007-1146
The body of the report is available in PDF Format (681 KB)
Large amounts of rain fell on southern Maine from the afternoon of April 15, 2007, to the afternoon of April 16, 2007, causing substantial damage to houses, roads, and culverts. This report provides an estimate of the peak flows on two rivers in southern Maine—the Mousam River and the Little Ossipee River—because of their severe flooding. The April 2007 estimated peak flow of 9,230 ft3/s at the Mousam River near West Kennebunk had a recurrence interval between 100 and 500 years; 95-percent confidence limits for this flow ranged from 25 years to greater than 500 years. The April 2007 estimated peak flow of 8,220 ft3/s at the Little Ossipee River near South Limington had a recurrence interval between 100 and 500 years; 95-percent confidence limits for this flow ranged from 50 years to greater than 500 years.
Methods of Estimating the Magnitudes and Recurrence Intervals of Peak Flows
Estimation of Magnitudes
Estimation of Recurrence Intervals
Estimated Magnitudes and Recurrence Intervals of Peak Flows for the Flood of April 2007
1. Map showing Mousam River and Little Ossipee River Basins in southern Maine and data-collection locations
1. Estimated peak flows for selected recurrence intervals, Mousam River near West Kennebunk (USGS station number 01069500)
2. Estimated peak flows for selected recurrence intervals, Little Ossipee River near South Limington (USGS station number 01066500)
3. Estimated peak flows and recurrence intervals for flood of April 2007
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For further information, contact:
U.S. Geological Survey,
Maine Water Science Center
196 Whitten Road
Augusta, Maine 04330
or visit our Web site at: http://me.water.usgs.gov/.