Preface 



This study was funded by the Operations and Maintenance Division, 

 Headquarters, U.S. Army Corps of Engineers (HQUSACE). It is a 

 product of the U.S. Army Engineer Waterways Experiment Station (WES) 

 Coastal and Hydraulics Laboratory's (CHL) Coastal Inlets Research 

 Program (CIRP) under the "Scour at Inlet Structures" Work Unit 32932. 

 Dr. Steven A. Hughes was the CIRP Principal Investigator. 

 Dr. Nicholas C. Kraus was the CIRP Technical Manager, and Mr. E. 

 Qark McNair was the CHL Program Manager for CIRP. Messrs. John 

 Bianco, Charles Chestnutt, and Barry Holliday were HQUSACE Program 

 Monitors. General supervisory direction was provided by Mr. C. E. 

 Chatham, Chief, Navigation and Harbors Division; Mr. Charles C. 

 Calhoun, Jr., Assistant Director, CHL; and Dr. James R. Houston, 

 Director, CHL. 



This study was conducted by Dr. Christopher H. Barker and 

 Dr. Rodney J. Sobey, Department of Civil and Envkonmental 

 Engineering, University of California, Berkeley, California, during the 

 period July 1994 to September 1997. The report is a dissertation in partial 

 fiilfillment of the requirements for the degree of Doctor of Philosophy 

 awarded to Dr. Barker by the University of California, Berkeley, 

 California. 



The authors extend their gratitude to the following people for their 

 assistance. Laboratory results presented in Chapter 3 were provided by 

 Mr. Murray Townsend and Dr. John D. Fenton of the Australian Maritime 

 Engineering Cooperative Research Center at Monash University, 

 Melbourne, Australia. Laboratory data presented in Chapter 5 were 

 collected with the assistance of Dr. Steven A. Hughes, Navigation and 

 Harbors Division, CHL, and the technical staff at the Coastal and 

 Hydraulics Laboratory, WES. Field data presented in Chapter 6 were 

 provided by Mr. Gary L. Howell, Prototype Measurement and Analysis 

 Branch, CHL. The FORTRAN code given in Appendix A was based on 

 source code provided by Takumi Ohyama of the Institute of Technology, 



