of 1000-foot sections of sand fence of various types and arrangements were 

 installed on Core Banks, and periodic examinations and surveys made to 

 obtain information on the comparative effectiveness of various sections. 

 A self-contained wind measuring instrument has been installed in the test 

 area to obtain information on wind velocity during the experiment. It has 

 operated more or less continuously, although difficulties have been experi- 

 enced from time to time with the take-up mechanism for the recorder paper, 

 the inking mechanism, and the power supply. An interim report covering 

 the first year of the experiment has been prepared and was summarized in a 

 report given at the May meeting of the American Shore and Beach Preservation 

 Association. This report is to be. published by the American Shore and Beach 

 Preservation Association in their forthcoming October issue of "Shore and 

 Beach". A further and more detailed report is being prepared for the Eighth 

 Conference on Coastal Engineering in the fall of 1962. 



Two specific conclusions from the data are that (at least for this area 

 and local conditions) straight sand fencing trapped and held as much sand 

 as either a zigzag or side-spur fence configuration, and that fencing in- 

 stalled initially on a bull-dozed 2-foot sand ridge does not trap sand as 

 well as fencing installed initially on normal level ground. The sand accu- 

 mulation of the fences was flattened by the March storm, and some of the 

 fences have been destroyed by overwash .of the island during portions of the 

 year. It is planned that new fencing, as required, will be installed by 

 the State in November 1962, after the close of the hurricane season. In 

 connection with this project also, some experiments have been made to deter- 

 mine the feasibility of a siphon-type tide gage and a bubble-type tide gage 

 for use in both the sound and ocean areas. 



(m) Model Determination, Scour in Front of Seawalls 



The wave basin study attempting to experimentally relate depth and 

 lateral extent of scour at toes of seawalls to incident wave and beach 

 sediment characteristics has been continued. Additional data were obtained 

 with a 0.4-mm median diameter sand for comparison with earlier tests with 

 0.2-mm sand. Analysis of these data is now underway, and contour maps 

 showing elevations in the vicinity of the seawall are being analyzed. 

 Although the program has involved so far only a vertical wall located at 

 the still water level, other types of walls and locations relative to still 

 water level may be tested in the future. 



(n) March 1962 Storm Study 



A comprehensive program involving data collection and general field 

 observations, was initiated to study the effects of the March 1962 east 

 coast storm. Several teams were sent to the field immediately following 

 the storm to obtain data on the effects of the storm on the beach backshore 

 zones and on shore protective structures, as well as other data pertinent 

 to these zones. Virtually the entire shoreline between Montauk Point, Long 



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