features of the modeling system and presenting results of several sensitivity 

 tests and applications. 



14. Gravens and Kraus (1989) : Two different methods of representing 

 the effect of groins on the longshore sand transport rate are investigated. 



15. Hanson. Kraus. and Nakashima (1989) : This article presents results 

 of sensitivity tests on the procedure for calculating wave transmission at 

 detached breakwaters and the resultant shoreline change. The procedure is 

 verified using data from Holly Beach, Louisiana, the site of six detached 

 breakwaters of different materials and wave transmission characteristics. 

 Good agreement is found between calculated and measured shoreline position, 

 validating the calculation procedure and importance of wave transmission in 

 controlling shoreline change. 



16. Gravens. Scheffner. and Hubertz (1989) : This report describes an 

 application of GENESIS for the 9 -mile reach of Atlantic coast between Asbury 

 Park and Manasquan, New Jersey. The modeled reach included jetties at two 

 inlets and 44 groins. A methodology to incorporate wave shadowing by Long 

 Island on the project shoreline was developed and implemented through use of a 

 nearshore wave transformation model. A procedure for selection of a represen- 

 tative 3 -year time history of wave conditions from a 20 -year hindcast data 

 base is presented. The potential impact of excavation of three nearshore 

 beach-fill borrow sites on shoreline change was investigated, and the concept 

 of a verification variability range introduced. The performance of six 

 proposed and four revised project design alternatives was evaluated over a 

 10-year simulation period using GENESIS to predict the planform evolution of 

 the beach. 



17. Gravens (in preparation) : This report describes an application of 

 GENESIS to estimate the potential impacts on adjacent shorelines resulting 

 from the construction of a new ocean inlet system between Anaheim Bay and the 

 Santa Ana River in southern California. In this study three simultaneous 

 independent wave sources (Northern Hemisphere swell, Southern Hemisphere 

 swell, and locally generated wind sea) were used to drive the shoreline change 

 model. In addition to estimating potential shoreline impacts, three project 

 mitigation design alternatives were quantitatively investigated. 



A4 



