University of Maryland DRUM  
University of Maryland Digital Repository at the University of Maryland

Digital Repository at the University of Maryland (DRUM) >
Theses and Dissertations from UMD >
UMD Theses and Dissertations >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1903/13052

Title: Guidelines for Hydrologic Design for Nonhomogeneous Microwatersheds Using the Rational Method
Authors: McAfoos, Rebecca Lynn
Advisors: McCuen, Richard H
Department/Program: Civil Engineering
Type: Thesis
Sponsors: Digital Repository at the University of Maryland
University of Maryland (College Park, Md.)
Subjects: Civil engineering
Issue Date: 2012
Abstract: The Rational method is frequently used to calculate the peak discharge from a watershed for hydraulic design. However, the Rational method is based on several assumptions that can lead to underdesign and unexpected flood risk. The goal of this research was to improve the understanding of the effects of nonuniformity of land cover and watershed slope on hydrologic design for microwatersheds. The problematic assumptions of the Rational method were challenged through the development of trial microwatersheds with nonhomogeneous runoff coefficients and slopes. The results showed that under certain hydrologic conditions, the traditionally computed peak discharge rates could underestimate the actual maximum discharge that results from a subarea of the watershed. This peak was defined as a premature peak. General guidelines were developed to identify the hydrologic conditions for which a premature peak would be expected to occur. Following these guidelines should reduce flood risk in developing watersheds.
URI: http://hdl.handle.net/1903/13052
Appears in Collections:UMD Theses and Dissertations
Civil & Environmental Engineering Theses and Dissertations

Files in This Item:

File Description SizeFormatNo. of Downloads
McAfoos_umd_0117N_13443.pdfRESTRICTED ACCESS3.75 MBAdobe PDF130View/Open

All items in DRUM are protected by copyright, with all rights reserved.

 

DRUM is brought to you by the University of Maryland Libraries
University of Maryland, College Park, MD 20742-7011 (301)314-1328.
Please send us your comments