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Analysis of Water-Level Rise Effects on Littoral Transport
C. R. Berquist (1), W. F Tanner (1)
A computer project has included evaluation of the effects of changes in wave height, wave period, wave approach angle, bottom slope and water depth, on beach erosion. This work is primarily applicable to large lakes where long-term changes in water level may be as much as one or two meters. The change in potential erosion is expressed as a ratio of littoral power values. The most important independent variable entering into this ratio is the change in water level. An increase in level of one or two meters can give ratios in the range of 100 to 250 and even higher. A ratio of 100 means that, after the rise in level, the littoral component of power, and hence the amount of sand eroded and transported, is initially 100 times as great as prior to the rise.
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