maps. A technical report dealing with a graphical technique for 

 forecasting waves was in preparation. 



VII. Massachusetts Institute of Technology, Contract No. DA-ii9-055 - 

 eng-16, Status Report dated 15 March 1955 



The experimental program has been completed. Analysis of all 

 data on both the wave characteristics and the sediment motion was con- 

 tinued and has been essentially completed. A report presenting the 

 results of this analysis is being prepared. 



VIII. Waterways Experiment Station, Vicksburg, Mississippi 



Wave Run-up Study t 



Testing was completed on the recurved wall, and testing was 

 initiated on a riprap-faced seawall with a seaside slope of 1 on l£. 



IX. Beach Erosion Board, Research Division, Project Status Report 

 for Quarter ending 15 March 1955 "" 



In addition to the research projects under contract to various 

 institutions which are reported on above, the Research Division of the 

 Beach Erosion Board is carrying out certain projects with its own 

 facilities. The main unclassified projects have been described in 

 previous numbers of the Bulletin, and a short description of some of 

 the work accomplished through the last quarter is given below: 



Measurement of Suspended Material in Laboratory Wave Tanks - A 

 series of suspended samples were taken in and near the surf zone with 

 a pump type sampler for laboratory use to determine best sampling 

 methods. Location of the sampler intake with respect to ripple crest 

 and trough appears to influence results, greater concentrations being 

 observed over the ripple crests. Water temperature also appears to 

 affect the concentrations observed, much higher concentrations occurring 

 with lower temperatures. 



Wave Run-up on Permeable Slopes - Testing of wave run-up on per- 

 meable beach slopes has been initiated, the first slope tested being 

 1 on 10. Results obtained will determine the effect of both sand 

 grain roughness and permeability. 



Routine progress, testing and analysis have been made on other 

 projects being carried out by the Research Division. In addition, 

 Research Division reports on "Laboratory Study of Effect of Tidal 



Action on Wave-Formed Beach Profiles" by G. M. Watts and R. F. 

 Dearduff j "Laboratory and Field Tests of Sounding Leads" by G. M. Watts; 

 "North Atlantic Coast Wave Statistics Hindcast by Bretschneider-Revised 

 Sverdrup-Munk Method" by T. Saville Jr.} "Laboratory Study of Shock 

 Pressures of Breaking Waves" by C. W. Rossj "Generalized Laboratory 

 Study of Tsunami Run-up" by K. Kaplan, and "The Effect of Fetch Width 

 on Wave Generation" by T. Saville Jr., were completed and published 



