CONTENTS 



CONVERSION FACTORS, U.S. CUSTOMARY TO METRIC (SI) 5 



I INTRODUCTION . . . . ' 7 



II WAVE TRANSMISSION BY OVERTOPPING , 8 



III WAVE TRANSMISSION THROUGH PERMEABLE BREAKWATERS 9 



IV EXAMPLE ■ . 10 



APPENDIX LISTING OF THE COMPUTER PR0GRA^1 MADSEN 17 



TABLES 



1 Porosity of various armor units 9 



2 Kinematic viscosity of water 10 



3 Format of input information 12 



4 Sample input 14 



5 Sample output 16 



FIGURES 



1 Definition of terms for wave transmission for permeable 



breakwaters 8 



2 Observed and predicted transmission coefficients for a 



rubble-mound breakwater 11 



3 Example breakwater 13 



4 Information required for (horizontal layer) example breakwater . 15 



