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Main Title Evaluation of design flood frequency methods for Iowa streams /
Author Bradley, A. A., Jr.
Other Authors
Author Title of a Work
Chen, L. C.
Wehmeyer, L. L.
Publisher IIHR-Hydroscience and Engineering, University of Iowa,
Year Published 2009
Report Number TR-533
OCLC Number 425917344
Subjects Floods--Iowa--Mathematical models ; Flood forecasting--Iowa ; Floods--Mathematical models ; Rational formula (Hydraulics) ; Runoff
Internet Access
Description Access URL
http://publications.iowa.gov/id/eprint/20054
http://ntl.bts.gov/lib/31000/31500/31552/TR-533_Final.pdf
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELBM  GB1399.2.B73 2009 AWBERC Library/Cincinnati,OH 05/01/2017
Collation xi, 94 pages : illustrations (some color), maps ; 28 cm
Notes
"June 2009." Includes bibliographical references (pages 91-94) . Final report. Sponsored by the Iowa Highway Research Board and the Iowa Dept. of Transportation
Contents Notes
The objective of this project was to assess the predictive accuracy of flood frequency estimation for small Iowa streams based on the Rational Method, the NRCS curve number approach, and the Iowa Runoff Chart. The evaluation was based on comparisons of flood frequency estimates at sites with sufficiently long streamgage records in the Midwest, and selected urban sites throughout the United States. The predictive accuracy and systematic biases (under- or over-estimation) of the approaches was evaluated based on forty-six Midwest sites and twenty-one urban sites. The sensitivity of several watershed characteristics such as soil properties, slope, and land use classification was also explored. Recommendations on needed changes or refinements for applications to Iowa Streams are made.