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REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 

 TP 79-4 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE fund Subtitle) 



CHANGES IN RATES OF SHORE RETREAT, 

 LAKE MICHIGAN, 1967-76 



5. TYPE OF REPORT & PERIOD COVERED 



Technical Paper 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfaJ 



Edward B . Hands 



8. CONTRACT OR GRANT NUMBERS 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-GE) 



Kingman Building, Fort Belvoir, Virginia 22060 



10. PROGRAM ELEMENT, PROJECT. TASK 

 AREA a WORK UNIT NUMBERS 



D31235 



11. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



December 1979 



13. NUMBER OF PAGES 



71 



14. MONITORING AGENCY NAME S ADDRESSf/f d/«oren( from ControtUng Ollice) 



15. SECURITY CLASS, (of thia report) 



UNCLASSIFIED 



15a. DECLASSIFICATION/ DOWNGRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (o( this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (ot the abstract antaradin Block 30, It dllterent horn Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue on rsversa aide it neceaaary and Identify by 6/ocfc number; 



Erosion prediction Lake levels Profiles 

 Great Lakes Lake Michigan Submergence 



20. ABSTRACT CCanttaum am nreram aitta ff n»c»ff««iy and tdenllty by block number; 



Shorelines tend to retreat landward as water levels rise. Less than 20 per- 

 cent of the shore, lost as Lake Michigan rose between 1967 and 1976, was due to 

 direct inundation; the remaining 80 percent was due to increased erosion in re- 

 sponse to the higher lake levels. A simple correlation of lake level change and 

 simultaneous shore retreat ignores the inevitable lag between process and re- 

 sponse, but still accounts for 50 percent of the variance in shore retreat. A 

 graphic summary of field data is presented to estimate effects of future lake 

 level changes in similar coastal environments. Qualitative guidance is provided 



M73 



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