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FLOOD PROFILES OF IOWA STREAMS
PROJECT PERIOD:
Continuous since 1957
PROJECT CHIEF:
D.A. Eash (daeash@usgs.gov)
STUDY AREA:
Statewide
COOPERATING AGENCY:
Iowa Highway Research Board and the Project Development Division of
the Iowa Department of Transportation (Iowa DOT Project HR-140)
NEED FOR STUDY:
Flood peak and water-surface-elevation profile information
is needed for the economical and safe location and design of
bridges and other structures on or over streams and the
adjacent flood plains. Defining the limits of flood
inundation and establishing encroachment limits on flood
plains are related problems needing this information. Data
for major floods are needed to compute flood-peak discharges
and calibrate water-surface-elevation profile models at
ungaged sites along streams.
OBJECTIVES:
Define the water-surface-elevation profiles and
corresponding discharges along streams in basins with at
least 100 mi2 of drainage area for selected floods.
Evaluate the flood characteristics and hydraulics at
existing and proposed flow structures in basins of all sizes
when requested.
PROGRESS:
A new flood-profile report was published in 2006. This report documents the May 23, 2004, flood on the lower Turkey and Volga Rivers in Clayton County and on the upper Maquoketa River in Delaware, Clayton, and Fayette Counties. The report citation is: Eash, D.A. 2006, Flood of May 23, 2004, in the Turkey and Maquoketa River Basins, northeast Iowa: U.S. Geological Survey Open-File Report 2006-1067, 35 p. The report is available online at uniform resource locator (URL) http://pubs.water.usgs.gov/ofr20061067
ONLINE INFORMATION:
Map and Chronology of Iowa flood-profile reports prepared by the USGS
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