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change in water level will illicit a similar response, or (b) by balancing 

 sediment gains and losses in a manner that would adjust an equilibrium profile 

 to the new water level. 



The first method entails a qualitative evaluation of differences in lake 

 level behavior and geomorphic conditions between the study site and the site 

 of application. If mean water levels are predicted to remain at their new 

 elevation long enough for complete profile adjustment, then the second method 

 (sediment balance approach) should be used. The latter approacli also accounts 

 for site-specific variations. 



Shore recession in response to higher mean water levels involves adjust- 

 ments which affect a broad area of the nearshore zone. The sediment balance 

 approach provides a realistic model for evaluating the ultimate response of 

 both the shoreline and the nearshore zone to a quasi-permanent change in water' 

 levels. This fact was verified by measurements of profile change between 1967 

 and 1976 along a section of the eastern shore of Lake Michigan. This data set 

 also permitted an evaluation of the timelag between lake level changes and 

 profile readjustment. A relationship between the maximura depth of profile 

 adjustment and the wave climate is proposed which will facilitate application 

 of these results to other locations throughout the Great Lakes. 



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