Design Problem jongshorff Transport 



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If 8 of /33 

 J. R.- W. 



21 Mar. 73 



longshore Sand Transport (cont) 



4. (cont) shoreline may not contribute 

 significantly, if at all, to the 

 longshore component of wave 

 energy and perhaps should not 

 have been considered in the 

 computations. 



The precedino procedure can be 

 adapted to compute longshore transport 

 rotes by calibrating it to establish k 

 based on knov^n transport rotes. 



Site I Ch'incoteague Inlet, Virgin) a 



based on a report entitled, "Atlantic 

 Coast of Moruland and Assateogue Island 

 Virginia -Draft Survey Fleport on beach 

 Erosion Control «. Hurricane Protection' 

 (Reference 15) 400, 000 ud^yr of sand ore 

 deposited at ti'sh'ing Point at the south end 

 of Assateogue Island. The shore alignment 

 at Ffshi'nq Point is approximately Zo'* east of 

 north. It r^'ill be assumed that the 4oo,000 

 yd^/yr is the southward transport. 



for a shoreline azimuth of 2o^ 



Pscidh^ 24.5'^loUtlbJffyn 



= 4.0 xlO^ yd^/yr 



^ south 

 let k' be the ratio of <^V^ j hence 



k 



^•^^^^'' ^IC>.4G.I0-''yd'/lb 



Ref 15 



24. ^^10^ 

 site 2 Cold Spring Inlets Nev\/Jerse u 



Based on a paper entitled, "Coastal 

 Processes and beach Erosion^' C.E.R..C. Reprint 

 R. l-crij Jan I9i7 by XU -Cold we 1 1 (Reference ^), 

 the net northv^and movement of sand at Cold 

 Spring Inlet is 5oo,ooo yd'/yr:, the net 

 south vsiard movement is 700, 000 yd^/yr. On 

 the north side of the inlet the shoreline 



Ref 6 



8-118 



