20 



^ 



a, -20 



'T~T~T"T"TT~|"T"T~TT"PT*TT~rT""m"T~]"T"TT 



- Bluff Recession 



Shoreline Changes 



^Q* I ■ I ■ I ■ 



10 20 30 40 50 



Station 



6 

 4 



2 

 



-2^ 

 -4^ 

 -6 

 --8 

 -10 



-12 



60 



Figure 28. Rates of bluff recession and shoreline change along 

 reach D from 19 November 1970 to 23 November 1974. 



Table 8. Summary of bluff, shore, and beach data for reach D (54 stations) 





Bluff recession 



Shoreline change 



Beach width'' 



Period 



Date 



(m3 



Rate 

 (m/yr) 



a 

 Cm/yr) 



Max. 

 (ni/yr) 



(m) . 



Rate 

 (m/yr) 



a 

 (m/yr) 



Max. 

 (m/yr) 



(m) 



Change 

 (m) (m) 



length 

 (mo) 



19 Nov. 1970 



15 Apr. 1971 



16 Nov. 1972 

 18 Oct. 1973 

 23 Nov. 1974 



1.1 

 3.7 

 7.1 

 4.4 



2.6 

 2.4 

 7.8 



4.1 



2.8 

 2.4 

 4.3 

 2.0 



10.2 

 8.3 



17.4 

 8.2 



2.5 



-4.5 



-12.5 



2.0 



5.9 



-2.9 



-13.6 



1.8 



13.0 

 3.4 

 5.7 



4.7 



50.7 

 -14.4 

 -28.1 



20.6 



3.0 

 6.9 

 7.5 

 1.8 

 9.0 



3.5 

 4.5 

 ^.1 

 2.0 

 3.1 



3.9 



0.6 



-5.7 



7.2 



5 



19 

 11 

 13 



19 Nov. 1970 



to 

 23 Nov. 1974 



16.3 



4.1 



1.8 



7.5 



-12.5 



-3.1 



2.0 



7.6 





48 



^Beach width adjusted to lake level (176.79 meters IGLD) . 



43 



