. Bulletin of the Beach Erosion Board. Shore protection; Beach erosion. (d + H + h^) (wd + Pi)_ „^2 (21) (d + h^ -H H)'^ (vd + P^) ^3 ^^e 6 6 R. 1 ~ 2 " (d '\ - H) (vjd - h^ 2 M = ^- (d '^ -H)2 (wd -V i 6 (22) (23) (2li) These formulas for pressures created by the clapotis are based upon the assumption that the vertical wall rests upon the natural bottom. If the vertical wall rests on a stone foundation, the action of the wave depends on the profile of the foundation structure, 208, Wall of Low Height. - If the height of the wall is less than the predicted wave height at the wall, forces
. Bulletin of the Beach Erosion Board. Shore protection; Beach erosion. (d + H + h^) (wd + Pi)_ „^2 (21) (d + h^ -H H)'^ (vd + P^) ^3 ^^e 6 6 R. 1 ~ 2 " (d '\ - H) (vjd - h^ 2 M = ^- (d '^ -H)2 (wd -V i 6 (22) (23) (2li) These formulas for pressures created by the clapotis are based upon the assumption that the vertical wall rests upon the natural bottom. If the vertical wall rests on a stone foundation, the action of the wave depends on the profile of the foundation structure, 208, Wall of Low Height. - If the height of the wall is less than the predicted wave height at the wall, forces may be approximated by drawing the force polygons as if the wall were higher than the iiipinging wave, then analysing only that portion below the wall crest. Thus in Figure 77 the force due to a wave crest at the wall is conputed from the area AFBSC, wall elevation ^^^yyyjA''. still water level FIGURE 77. Pressure on walls of low height 106. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Beach Erosion Board. [Washington, D. C. ] : The Board
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