2. Profile Surveys. 
a. Interpretation of Contour Movement Plots. The profile surveys 
(discussed in Vol. I) measured the three space variables of onshore- 
offshore distance (station), longshore distance (range), and elevation 
at fixed times (indicated in Table 2) during the experiment. The CONPLT 
method (see Vol. I) for presenting the data involves fixing the longshore 
distance by selecting data from a given range and analyzing the surveys 
along that range. The surveyed distance-elevation pairs along that range 
are used to obtain the interpolated position of equally spaced depths; 
e.g., -0.1, -0.2, and -0.3 on the hypothetical profile in Figure 10(a). 
These contour positions from each survey are then plotted against time 
(aloes OF ib) 
A horizontal line in Figure 10(b) represents no change in contour 
position. An upward-sloping line indicates landward movement of contour 
position (i.e., erosion); a downward-sloping line indicates seaward move- 
ment (i.e., deposition). The slope of a line indicates the rate of ero- 
sion or deposition (horizontally) at that elevation. The three x's at 
time t, (Fig. 10,b) indicate multiple contour positions at -0.2-foot 
elevation which is shown by the intersection of the dashline with profile 
t> in Figure 10(a). 
Three types of contour movement plots included in this study are: 
(a) The seawardmost intercepts along one range for specified 
depths ; 
(b) the seawardmost intercepts for one selected depth along all 
ranges; and 
(c) all contour intercepts including multiple intercepts along 
one range, for up to 12 selected depths. 
The coordinate system used for the contour movement plots is shown 
in Figure 11. The elevations referred to in the discussion that follows 
are: 0.1 foot (3.0 centimeters), -0.2 foot (-6.1 centimeters), -0.3 foot 
(-9.1 centimeters), -0.4 foot (-12.2 centimeters), -0.5 foot (-15.2 centi- 
meters), -0.6 foot (-18.3 centimeters), -0.7 foot (-21.3 centimeters), 
-0.8 foot (-24.4 centimeters), -0.9 foot (-27.4 centimeters), -1.0 foot 
(-30.5 centimeters), -1.1 feet (-35.5 centimeters), -1.2 feet (-36.6 
centimeters), -1.3 feet (-39.6 centimeters), -1.4 feet (-42.7 centimeters) , 
-1.5 feet (-45.7 centimeters), -1.6 feet (-48.8 centimeters), -1.7 feet 
(-51.8 centimeters), -1.8 feet (-54.9 centimeters), -1.9 feet (-59.9 
centimeters), -2.0 feet (-61.0 centimeters), -2.1 feet (-64.0 centimeters), 
and -2.2 feet (-67.1 centimeters). 
b. Profile Zones. Definitions of coastal engineering terms used in 
LEBS reports conform to Allen (1972) and the Shore Protection Manual 
(SPM) (U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 
1977). For the profile zones in this study, the boundary between the 
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