Archive image from page 44 of Detached breakwaters for shore protection. Detached breakwaters for shore protection . detachedbreakwat00dall Year: 1986 EXPECTED SHORELINE RESPONSE - ORIGINAL SHORELINE 22£ 0&> Nf-.;'.: V V Bmmmszs 1/ I TOwwwm BREAKWATER' Figure 18. Possible shore response to a segmented detached breakwater with incident waves normal to shore be prevented if the single breakwater or segment length is equal to or less than one-half the distance offshore (see also Bishop 1982), or simply I £ â =⢠x for single detached breakwater H < â x for segmented detached breakwate
Archive image from page 44 of Detached breakwaters for shore protection. Detached breakwaters for shore protection . detachedbreakwat00dall Year: 1986 EXPECTED SHORELINE RESPONSE - ORIGINAL SHORELINE 22£ 0&> Nf-.;'.: V V Bmmmszs 1/ I TOwwwm BREAKWATER' Figure 18. Possible shore response to a segmented detached breakwater with incident waves normal to shore be prevented if the single breakwater or segment length is equal to or less than one-half the distance offshore (see also Bishop 1982), or simply I £ â =⢠x for single detached breakwater H < â x for segmented detached breakwater This configuration permits intersection of the diffracted wave crests well be- fore the undiffracted portions reach the shoreline, thereby impeding tombolo development. If the predominant wave direction is nearly normal to the shore, the apex of the salient will be located approximately where the diffracted wave crests intersect at the moment the undiffracted portions reach the shore- line. The design theory employed for Lakeview Park postulated that salients would develop where the diffraction coefficient, K , equals isolines crossed (Walker, Clark, and Pope 1981). The average stable salient configur- ation was estimated by examining the location of the isoline for each pre- dominant wave condition. This method is described in Appendix A. 47. Detached breakwaters designed for protection along an open coast are commonly placed in an average water depth between and m. If economic or other considerations preclude satisfying the I or £ _< 1/2 x 41
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