Document Type

Thesis

Date of Degree

Fall 2014

Degree Name

MS (Master of Science)

Degree In

Civil and Environmental Engineering

First Advisor

Larry J. Weber

Second Advisor

Nathan C. Young

Abstract

The Iowa Flood Center (IFC), a unit of The University of Iowa's IIHR - Hydroscience & Engineering, and the Iowa Department of Natural Resources are developing a statewide floodplain boundary dataset to provide information that is critical to proper flood mitigation planning. During flooding, soil loss from agricultural land, in addition to inundation, can have a substantial economic impact on an agricultural state like Iowa. The ability to identify areas with a high potential to experience scour during flooding could assist farmers and land owners in making better land management decisions. Currently, the IFC statewide floodplain mapping program is creating annual exceedance probability floodplain data for all Iowa streams. The effort described herein has developed methods to take advantage of this large dataset, applying uniform open channel flow theory to spatially characterize scour potential using custom tools created with GIS model builder. The results of this thesis are being used by the Iowa Natural Heritage Foundation (INHF) and the IFC to develop a program through which certified crop consultants can help farmers make more informed land management decisions based on risk of flood related soil loss.

Public Abstract

The Iowa Flood Center (IFC), a unit of The University of Iowa’s IIHR – Hydroscience & Engineering, and the Iowa Department of Natural Resources are developing a statewide floodplain boundary dataset to provide information that is critical to proper flood mitigation planning. During flooding, soil loss from agricultural land, in addition to inundation, can have a substantial economic impact on an agricultural state like Iowa. The ability to identify areas with a high potential to experience scour during flooding could assist farmers and land owners in making better land management decisions. Currently, the IFC statewide floodplain mapping program is creating floodplain maps for all Iowa streams. The effort described herein has developed methods to take advantage of this large dataset and use it to characterize scour potential within floodplains. These scour characterization maps will provide a cost effective means of making approximate assessments of scour potential, but more detailed two dimensional modeling will still be required if a high level of precision is required. The results of this thesis are being used by the Iowa Natural Heritage Foundation (INHF) and the IFC to develop a program through which certified crop consultants can help farmers make more informed land management decisions based on risk of flood related soil loss.

Keywords

publicabstract, Floodplain, HEC-RAS, Scour

Pages

xvii, 217 pages

Bibliography

Includes bibliographical references (pages 128-129).

Copyright

Copyright 2014 Riley Mondloch

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