VII. Agricultural and Mechzinical College of Texas, Contract DA -49-055- 

 Civ-eng-56-4 and eng-58-9. Estimation of Hurricane Surges . 



Additional work was done on the surge problem in Narragansett Bay 

 (eng-56-4) including some adjustments made for the presence of barriers 

 in the Bay. Some of the work applicable to Narragansett Bay was also 

 utilized in estimating surge conditions in portions of Long Island 

 Sound and Buzzards Bay. Considerable effort, too, has been made in 

 connection with the periodic tide problem for a complex bay system such 

 as Narragansett Bay. Some preliminary work has also been done in 

 connection with the feasibility of two-dimensional methods of analyzing 

 storm surge generation on the continental shelf. Analysis of storm 

 surge data in the New York Harbor entrance area (eng-58-9) is now under 

 way, and prediction methods for the New York area are being developed 

 and tested. Funds for these two studies were provided by the U. S. 

 Army Engineer Division, New Engljuid jind the U. S. Army Engineer District, 

 New York. 



VIII. Dr. W. C. Krumbein (Consultant). Study of Beach Sampling Methods . 



A report entitled "A Method for Specification of Sand for Beach 

 Fills" was published as Technical Memorandum No. 102 of the Board. This 

 report presents a method of determining design slopes and material 

 characteristics for beach fills from samples from an eroded beach and its 

 condition at the time of survey. Additional data pertaining to this 

 study are being gathered and analyzed. 



IX. Dr. John H. Davis. Contract for Study of Dune Stabilization . 



A report entitled "Dune Formation and Stabilization by Vegetation 

 and Plantings" was published as Technical Memorandum No. 101 of the 

 Board. The report discusses the stabilization of dunes by plants in 

 the various coastal regions of the United States. It presents data on 

 the history of several continuing efforts to stabilize dunes by planting 

 vegetation. 



X. Beach Erosion Board Staff . 



(a) Wave Forces on Structures 



Numerous measurements have been made of the wave forces on a vertical 

 12-inch pile with a 3-foot sensitive (instrumented) section. The pile is 

 cantilevered from a frame at the top of the tank and may be raised or 

 lowered to place the 3-foot sensitive section at various elevations. Waves 

 with periods ranging from 5 to 16 seconds, and heights ranging from 2 to 

 6 feet have been tested in water depths ranging from 7 to 15 feet. The 

 forces on the 3-foot sensitive section ranged from 20 to 100 pounds for 

 nonbreaking waves, and breaking waves produced forces of short duration 

 as high as 1,000 pounds. These data are being analyzed and prepared for 

 publication. Wave forces on a 1 on 3 and 1 on 6 stoned levee structure 

 were obtained for waves ranging from 1.5 to 5 feet. 



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