not applicable to simulating a randomly fluctuating beach system in which no
trend in evolution of the shoreline is evident.
In particular, GENESIS is not
applicable to calculating shoreline change in the following situations which
involve beach change that is not related to coastal structures, boundary
conditions, or spatial differences in wave-induced longshore sand transport:
beach change inside inlets or in areas dominated by tidal flow; beach change
produced by wind-generated currents; storm-induced beach erosion in which
cross-shore sediment transport processes are dominant; and scour at struc-
tures. In an appropriate application the primary capabilities and limitations
of the GENESIS modeling system are listed in Table 1 (Hanson and Kraus 1989).
Table 1
Capabilities
and Limitations of GENESIS Version 2
Canabilities
Almost arbitrary numbers and combinations of groins, jetties, detached
breakwaters, beach-fills, and seawalls
Compound structures such as T-shaped, Y-shaped, and spur groins
Bypassing of sand around and transmission through groins and jetties
Diffraction at detached breakwaters, jetties, and groins
Coverage of wide spatial extent
Offshore input waves
of arbitrary height, period, and direction
Multiple wave trains (as from independent wave generation sources)
Sand transport due to oblique wave incidence and longshore gradient in wave
height
Wave transmission through detached breakwaters
Limitations
No wave reflection from structures
No tombolo development (shoreline cannot accrete to a detached breakwater)
Minor restrictions on placement, shape, and orientation of structures
No direct provision for changing tide level
Basic limitations of shoreline change modeling theory
PROGRAM AVAILABILITY:
The GENESIS modeling system was originally developed
and tested on the CERC VAX 11/750 computer. The modeling system is now
available to Corps of Engineers users as an executable file which may be run
Previous Page
