EM 1110-2-1100 (Part III)
30 Apr 02
Ideal case of an unstable null point (Walton 1972)
Cross-shore distribution of longshore sediment transport.
(1) The relationships given herein yield rates of total longshore sediment transport. Some applications
require evaluations of the cross-shore distribution of the transport; e.g., for the effective design of groins,
jetties, and sand weirs for weir jetties. In addition, a description of the cross-shore transport distribution is
required in many computer simulation models.
(2) Bodge (1986) presents a literature review of the data and models which describe the cross-shore
distribution of the longshore sediment transport. The collection of field data regarding this topic is difficult.
The earliest approach was to use sand tracers (e.g., Zenkovitch 1960; Ingle 1966; Inman, Komar, and Bowen
1968; Inman, Tait, and Nordstrom 1971; Inman et al. 1980; Kraus et al. 1982, White 1987). As an example,
Zenkovitch (1960) determined distributions at a coastal site by averaging a large number of tracer
observations and found three maxima for the sand transport: two over longshore bars and a third in the swash
Longshore Sediment Transport