98
Estimating values of shoreward mass transport involved solving the aforementioned two equations. A simplistic model was applied to obtain an estimation of the seaward return flow from the laboratory current measurements. This was accomplished by multiplying each current measurement by the width of the tank and the depth where the current reading was taken minus the value of H/2. The resulting calculation provides an estimation of the volume of water returned seaward. The calculated mass transport and estimated measured return flow calculations for the six trials are listed in the tables below. A positive value indicates shoreward flow; a negative value seaward flow.
Table 5.20: The Results of the Mass Transport and Return Flow Calculations for Trial 1.
Mass Transport Location Return Flow Location Y.,. Depth
(Ft/Sec) (Ft) (F/Sec) (Ft) (Ft)
(Calcuated) (Calculated)
38.67 672 -14.93 624 11.47
21.60 548.8 -5.83 500.8 3.93
2.70 320 8.00 272 2.59
7.25 2.08
Table 5.21: The Results of the Mass Transport and Return Flow Calculations for Trial 3.
Mass Transport Location Return Flow Location Y.u,, Depth
(Ft/Sec) (Ft) (Ft/Sec) (Ft) (Ft)
(Calculated) (Calculated)
55.84 672 -42.30 624 9.50
6.98 ;576 -21.35 528 7.40
4.13 464 0.625 416 2.15
1.89 3.83
1.13 360 1.78 312 2.41
0.88 176 2.34 128- 2.15