I I I I I I I I 



I r I I I I I I I I I I I I I I I 20 



- 10 



Shoreline Chonge 



Bluff Recession 



I I I I I ' I I I I 



-20 



-30 



70 80 90 100 



Slotion 



Figure 8. Rates of bluff recession and shoreline 

 change along reach A from 19 November 

 1970 to 23 November 1974. 



Table 



5. 



Summary of 



bluff. 



shore , and 



beach 



data 



for reach 



A (57 stations) . 



Date 



Bluff recession | 





Shoreline 



change 





Beach width' 



Period 

 length 





Rate 







Max. 





Rate 



o 



Max. 









Change 







(m) 



(m/yr) 



(ra/yr) 



(ni/yr) 



Cm} 



(m/yr) 



(m/yr) 



(m/yr) 



(m) 



(m) 



(m) 



(mo.) 



19 Nov. 



1970 



















4.3 



4.6 











2.2 



5.2 



3.9 



14.6 



0.9 



2.3 



13.5 



-25.9 









5 



15 Apr. 



1971 



















5.5 



3.4 



1.2 









1.4 



2.5 



2.1 



7.8 



5.0 



8.6 



7.9 



23.1 









7 



16 Nov. 



1971 



















9.8 



4.7 



4.3 









2.8 



6.7 



5.5 



22.7 



-8.0 



-19.3 



11.5 



-47.5 









5 



18 Apr. 



1972 



















8.3 



3.3 



-1.5 









3.2 



5.5 



4.9 



16.7 



-2.7 



-4.7 



9.0 



-25.8 









7 



16 Nov. 



1972 



















5.3 



3.5 



-3.0 









2.5 



7.6 



7.1 



32.0 



-2.6 



-7.8 



16.4 



-39.8 









4 



20 Mar. 



1973 



















5.5 



4.2 



0.2 









2.6 



3.9 



3.5 



12.8 



0.8 



1.2 



9.2 



23.9 









8 



20 Nov. 



1973 



















6.8 



4.6 



1.3 









1.7 



3.5 



2.5 



10.4 



-1.2 



-2.3 



7.4 



-16.6 









6 



20 May 



1974 



















7.2 



4.8 



0.4 









1.9 



3.8 



2.8 



12.2 



-5.1 



-10.3 



9.8 



-28.0 









6 



23 Nov. 



1974 



















8.0 



4.5 



0.8 





19 Nov. 



1970 



















4.3 



4.6 











3.6 



3.6 



2.2 



10.7 



5.9 



5.9 



7.0 



19.8 









12 



16 Nov. 



1971 



















9.8 



4.7 



5.5 









6.0 



6.0 



3.4 



15.8 



-10.7 



-10.7 



7.7 



-34.8 









12 



16 Nov. 



1972 



















5.3 



3.5 



-4.5 









5.2 



5.2 



3.8 



13.7 



-1.8 



-1.8 



7.3 



-18.0 









12 



20 Nov. 



1973 



















6.8 



4.6 



1.5 









3.6 



3.6 



1.9 



7.6 



-6.3 



-6.3 



4.9 



-18.0 









12 



23 Nov. 



19 74 



















8.0 



4.9 



1.2 





19 Nov. 



1970 

























to 





18.4 



4.6 



1.5 



7.6 



-12.9 



-3.2 



2.1 



-8.1 







48 



23 Nov. 



1974 

























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



23 



