T.M. No. 50 - February 1953 



Annotated Bibliography on Tsunamis by Marclal P. Cue I ler 



A bibliography of 195 items prepared and annotated as a project of 

 the Committee for the Study of Tsunamis, American Geophysical Union. 



T.M. No. 51 - February 1953 



Laboratory Study of Wave Energy Losses by Bottom Friction and 

 Percolation by Rudolph P. Savage 



The theory for dissipation of wave energy by bottom friction 

 (Putnam and Johnson} and by percolation in a permeable sea bottom 

 (Putnam) were checked by laboratory experiment. The experimental 

 data were obtained in a wave flume divided by a splitter wall, one 

 side of which had a smooth bottom with essentially no bottom friction 

 or percolation and the other side a rough (rippled) or a permeable 

 sand bottom. Energy losses were measured as reduction in wave height. 

 Experimental losses due to friction agreed reasonably well with those 

 given by theory for conditions of natural ripples, but were substan- 

 tial ly greater for artificial ripples dissimi lar to natural ripples. 

 Experimental losses due to percolation were far less than theoretical 

 values, the difference apparently varying with water depth. 



T.M. No. 32 - March 1955 



Accuracy of Hydrographic Surveying in and Near the Surf Zone 

 by Thorndil<e Savi Me, Jr. and Joseph M. Caldwell 



The results of a study to determine on a statistical basis the 

 degree of accuracy that can be expected in hydrographic survey work 

 where comparability of successive surveys is a prime consideration 

 are presented. Test surveys to determine the magnitude of sounding 

 error (accuracy with which the deduced profile actually represents 

 the bottom hydrography along the particular range being sounded) and 

 spacing error (accuracy with which the particular profile portrays 

 the characteristics of its assigned section of beach or bottom) were 

 made at Mission Beach, California. Application of the results of 

 these tests indicates that serious misinterpretations of volumetric 

 information derived from comparative surveys can result if the probable 

 survey error is not considered. 



T.M. No. 55 - March 1953 



Laboratory Investigations of the Vertical Rise of Solitary Waves on 

 Impermeable Slopes by Jay V. Hall, Jr. and George M. Watts 



Empirical relationships between wave height, water depth, slope 

 angle, and maximum elevation reached by a solitary wave running up the 

 slope are derived by laboratory experiment. Measured wave velocity is 

 compared with theoretical values. 



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