EM 1110-2-1100 (Part III)
30 Apr 02
Figure III-2-38.
Triangular beach fill (t=0)
where
x
a
and
U'
X'
a
2 εt
(17) Figure III-2-39 is a nondimensionalized solution graph for the case of a triangular planform beach
nourishment. Only the portion of the solution graph for x $ 0 is presented, as the solution is symmetric for
values of x less than zero.
(18) A fourth case to be considered is that of a long fill project with a gap as shown in Figure III-2-40.
For the case in which a beach nourishment has been placed on an existing beach but a gap has been left in
the beach nourishment project (such as occurred in a beach nourishment project on Jupiter Island, Florida,
in 1974), the following solution would apply:
Y
a
x
a
x
% erfc
erfc
1&
1%
y'
(III-2-34)
2
a
a
2 εt
2 εt
The nondimensionalized solution graph for this particular planform of beach nourishment is provided in
Figure III-2-41. Only the portion of the solution graph for x $ 0 is presented, as the solution is symmetric
for values of x less than 0.
(19) A fifth case to be considered is that of the end of a rectangular fill on a long beach nourishment
project as shown in Figure III-2-42. The nondimensional solution graph for the case of a semi-infinite beach
fill where the fill is contained within the area x > 0 is given in Figure III-2-43. This semi-infinite beach fill
case can be utilized to provide the shape of the end of a long beach fill and the extent of the fill as it
progresses down the coast with time. The solution for this specific case is
Yo
x
1 % erf
y'
(III-2-35)
2
2 εt
Longshore Sediment Transport
III-2-69
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