Open AccessTHE RATE OF LONGSHORE SEDIMENT TRANSPORT AND BEACH EROSION CONTROL
Author(s) -
Yoshito Tsuchiya
Publication year - 1982
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v18.81
Subject(s) - sediment transport , longshore drift , sediment , geology , erosion , coastal erosion , surf zone , shore , breaking wave , geomorphology , geotechnical engineering , oceanography , wave propagation , physics , quantum mechanics
The main purpose of this paper is to propose an ideal methodology for beach erosion control from the viewpoint of controlling the total rate of longshore sediment transport. For this, a new formulation of the rate of longshore sediment transport is made. The total rate is directly proportional to the longshore component of wave power in field coasts, but not in laboratory ones. How to control the total rate of longshore sediment transport is considered. There are two ways applicable for practical purposes. The first is to decrease the breaker depth by changing the bottom topography, and the second to decrease the incident angle of breaking waves by changing either the bottom topography or the inclination of shoreline to the incidence of predominant waves. Two typical, but ideal examples are explained for beach erosion control by this methodology.