study of Wind Set-up and Wave Generation in Inland Waters - 

 A number of wave^ wind and water-stage recorders have been installed on 

 Lake Okeechobee ^ Florida, and considerable data gathered from them in 

 the past three years » Data for two hurricanes (26 August 19h9 and 17 

 October 19^0) have been analyzed empirically and published in Technical 

 Memorandum No. 26 of the Beach Erosion Board in June 19^2= Further data 

 is being obtained. Further analysis has indicated that, at least for 

 the major axis of the lake^ the plan form of the lake probably has only 

 a minor effect on the set-up produced. 



Preparation of Reports Based on Mission Bay Field Data - A 

 report is being prepared on the probable magnitude of the errors involved 

 in hydrographic surveying and will be presented at the Coastal Engineering 

 Conference at FJT in October. The total error is considered as coming from 

 two primary sources s the firsts a sounding error , results from errors 

 inherent in the sounder and the methods involved in reducing the sounder 

 data to an actual bottom profile^ and thus is a measure of the accuracy 

 with which the profile deduced from the sounder record actually represents 

 the hydrography along the particular range; the seconds a spacing error^ 

 results from the fact that profiles are spaced different distances apart 

 and that a particular profile may not be entirely representative of its 

 assigned section of beach. 



Study of Wave Refraction Theory by Wave Tank Tests - A tentative 

 program for this study has been drav -p for accomplishment in the coast 

 model test basin when the basin is put, into operation. Higher priority 

 projects will probably prevent these model tests from being performed in 

 the near future. A more accurate method of drawing refraction diagrams 

 was devised and was published in BEB Bulletin, July 19^2. 



Statistical Wave Data on the Great lalces - Under the General 

 Investigations program of the Beach Erosion Board., hindcast wave statistics 

 are to be obtained for the entire coastal waters of the United States, 

 This hindcast data will be supplemented, when possible^ with recorded data. 

 The first ones selected for study were Lake Michigan and Lake Erie, Five 

 stations were chosen for study on Lake Michigan (North Bay, Wisoonsin; 

 Milwaukee., Wisconsini Calumet, Ulinoisj Muskegon, Michigan, and Frankfort^ 

 Michigan) and four stations on Lake Erie, (Monroe, Michigani Clevelandc, 

 Ohio I Erie, Pennsylvania; and Buffalo, New York), It was thought that 

 these stations would give adequate coverage of the lake shores, being close 

 enough together to permit accurate interpolation between stations. Three 

 years of data (1914.8-1950) have been obtained from synoptic weather charts 

 for -these stations, and the data for Lake Michigan has been accumulated 

 statistically and will be presented in tabular and graphic form to be 

 published about January 19^3. The data for Lake Erie is expected to be 

 available later that year. All the wave data considers the significant 

 wave, and is for deep water conditions. Thus the waves must be refracted 

 for application to any par'ticular problem, 



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