TABLE OF CONTENTS JOHN B.HERBICH, PH.D., P.E.
W.H.Bauer Professor Emeritus
Ocean Engineering Program
Civil Engineering Department
Texas A&M University
College Station, TX 77843 3136, USA
| d, D | Design water depth at structure |
| d ? | Approximation to d |
| d b5 | Breaking water depth at site based on H 05 and T 5 |
| g | Acceleration of gravity (9.81 m/sec 2) |
| H 05 | Deepwater wave height calculated by averaging the five largest nonstorm waves that occur in a year (m) |
| H s | Significant wave height |
| I | Beach slope |
| L 5 | Wavelength at structure corresponding to deepwater conditions H 05 and T 5 |
| L c | Alongshore salient width, measured at original shoreline |
| L g | Gap distance between adjacent breakwater segments |
| L 05 | Deepwater wavelength corresponding to T 5 |
| L p | Alongshore project length (length of shoreline to be protected) |
| L s | Breakwater segment length |
| SAR | Salient area ratio |
| T 5 | Wave period corresponding to H 05 |
| X | Breakwater segment distance from original shoreline |
| X ? | Approximation to X |
| X g | Shoreline change at gap |
| X s | Desired shoreline advancement, salient length |
| | Approximation to X s |
| X s | Average salient length for project |
Beach erosion and accretion has proceeded for many thousands of years, ever since the first landmass was exposed to waves, currents, and winds. Man s interest in preserving or stabilizing the shoreline began with his first development in the coastal region, such as ports, harbors, residential communities, etc. Although these coastal developments have been around for hundreds, if not thousands, of years,...
