CETN-II-21
3/90
COMPUTER PROGRAM:
GENESIS Version 2
PROGRAM PURPOSE: The GENEralized model for SImulating Shoreline change
(GENESIS) is a system of numerical models developed to aid in the evaluation
of shore protection design alternatives. These evaluations are accomplished
through simulation of the nearshore wave climate and long-term shoreline
change.
BACKGROUND INFORMATION: GENESIS calculates shoreline change produced by
spatial and temporal differences in longshore sand transport produced by
breaking waves. The longshore extent of the modeled reach can range from less
than a mile to 50 miles, and simulation time periods can range from 1 month to
10 years. The shoreline evolution portion of the numerical modeling system is
based on one-line theory, which assumes that the beach profile shape remains
u n c h a n g e d , allowing shoreline change to be described uniquely in terms of the
translation of a single point (for example, Mean High Water shoreline) on the
p r o f i l e . Other features of the modeling system include a wave transformation
model to calculate shoaling, refraction, and diffraction; sand bypassing and
transmission at shore-perpendicular structures such as groins and jetties;
wave transmission at detached breakwaters; and a variety of terminal as well
as internal boundary conditions.
The predecessor model to GENESIS (Kraus 1988a,b,c,d) was developed as
part of the Nearshore Environment Research Center project conducted in Japan
(Horikawa and Hattori 1987). The structure of GENESIS was developed by Hanson
(1987) in a joint research effort between the University of Lund, Sweden, and
the Coastal Engineering Research Center (CERC), US Army Engineer Waterways
Experiment Station (WES).
Descriptions of GENESIS
Version 1 have been given by
Hanson (1987, 1989). The
\
program has been applied at
numerous project sites in-
cluding stretches of coast in
Alaska, California,
Louisiana, New Jersey, New
York, Texas, and outside of
the United States as shown in 8.
Figure 1 (Hanson and Kraus
1986; Chu et. a1 1987; Kraus
et al. l988; Gravens,
Scheffner, .and Hubertz 1989;
Hanson, Kraus, and Nakashima
1989). As a result of these
applications, the modeling
Figure 1. Sites of GENESIS applications
U.S. Army Engineer
Waterways Experiment Station, Coastal Engineering Research Center
3909 Halls Ferry Road, Vicksburg, Mississippi 39180-6199
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