wave height divided by 0.78. The dumped-material profile was compared with 

 the control profile over this surf zone region. When the dumped-material 

 profile had an excess of material relative to the control profile over any 

 section of the surf zone region, the excess material was transported out of 

 the dumped-material profile in the following manner. If the excess of mate- 

 rial was less than the quantity of material that could be transported accord- 

 ing to the longshore transport formula of the Coastal Engineering Research 

 Center (CERC) given in the SPM (1984), all of the excess sediment was trans- 

 ported out of the profile; however, no additional sediment transport was 

 computed as would arise from erosion of surf zone and beach line. Thus, the 

 focus of the computations was restricted to the fate of dredge disposed mate- 

 rial on entering the surf zone and not on erosion of the existing control 

 profile landward of the breaker line. On the other hand, if the quantity of 

 material entering the surf zone was greater than that which could be trans- 

 ported during the time-step according to the CERC formula, then the material 

 transported out of the dumped material profile was limited to the quantity 

 given by the CERC formula, thereby showing surf zone accretion. It was recog- 

 nized that an excess of material over just a part of the surf zone would not 

 be transported by the full power available in the surf zone. Thus, it was 

 assumed that the material transported in the surf zone was distributed 

 linearly over the „surf zone with zero transport at the shoreline and maximum 

 transport at the breaker line. If the excess of material was distributed over 

 a section of the surf zone, only that power available over the section was 

 used to transport material. Tests showed that the fate of the dumped material 

 did not depend significantly on the assumed transport distribution across the 

 surf zone. Virtually the same results were obtained when the transport 

 distribution was assumed to be uniform over the surf zone. Apparently the 

 quantity of excess material in the surf zone region during any time-step was 

 usually less than the quantity of material that could be transported according 

 to the CERC formula so that all of the material was transported during the 

 time-step. 



95. If there is to be shoreline stability, the dumped material must 

 enter the nearshore region. During large storms, the surf zone can extend a 

 very large distance seaward. Material in fairly deep water will be trans- 

 ported in a direction parallel to the coast during these large storms. How- 

 ever, if this material in deeper water does not move toward the shore, it will 



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