Effectiveness of beach nourishment on Effectiveness of beach nourishment on cohesive shores, St. Joseph, Lake Michigan effectivenessofb00nair Year: 1997 depth below datum (m) downcutting of cohesive profile (m) 'Initial Profile 'Cohesive Profile -Final (dS0=) * Final (d50=) - Coh. Erosion () 'Coh Erosion () 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 0 200 400 600 800 1,000 1,200 1,400 1,600 distance (m) a. Profile R23 cohesive profile erosion during 2 November, 1991 storm, dgp = mm &; mm actual depth below datum (m) erosion of cohesive profile (m) i ' i - '-' 4 â
Effectiveness of beach nourishment on Effectiveness of beach nourishment on cohesive shores, St. Joseph, Lake Michigan effectivenessofb00nair Year: 1997 depth below datum (m) downcutting of cohesive profile (m) 'Initial Profile 'Cohesive Profile -Final (dS0=) * Final (d50=) - Coh. Erosion () 'Coh Erosion () 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 0 200 400 600 800 1,000 1,200 1,400 1,600 distance (m) a. Profile R23 cohesive profile erosion during 2 November, 1991 storm, dgp = mm &; mm actual depth below datum (m) erosion of cohesive profile (m) i ' i - '-' 4 â Initial Profile Cohesive Profile 11 1 / 2 â -Final (d50=) 'i / 0 â Final (d50=) ' ~ Coh. Erosion () u '. / M ' -2 -4 -6 â Coh Erosion () f\\ yy - r-^^ -8 _-â'^'^^^^ -10 : ^^.^.-^-^^^^^^^^^^^^^ -12 Z--^''^^^^'^^^^^ -14 1 . 1 . 1 , 1 . 1 , 1 1 1 . 1 0 200 400 600 800 1,000 1,200 1,400 1,600 distance (m) b. Profile R22 cohesive profile erosion during 2 November, 1991 storm, dgQ = mm &; mm actual Figure 21. Downcutting results for the 2 November 1991 (SW) storm. Runs A and G (Sheet 1 of 6) Chapter 4 Analyses of Coastal Processes and Geomorphology 51
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