Army

Great Lakes Lake Michigan Submergence 14 WACr (Cefeeo.everee ebb N.omeemet mad idendufr by block nume)Sorelines 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 0 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 andI.. 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 I graphic summary of field data is presented to estimate effects of future lake level changes in similar coastal environments. Qualitative guidance is provid