3. Sédiment Transport
83
P - ÇirmN/'yfc)
= [(7F x 0.011 x l)/(0.846 x 0.002 x 100)]
= 0.204
Fi = (-3/4) + [(9/16) + (1/Pe)]1/2 = 1.85
P2 = (-3/4) - [(9/16) + (1/Ps)]1/2 = -3.35
A = [1/(1 -2.5P)] = 2.04
Pi = [(P2 - l)/(Pi - P2)]A
= [-3.35 - 1]/(1.85 - (-3.35))] x 2.04 = -1.706
P2 = 0.333
v = B1ÇX)P1 + AX>
v = P2(X)P2
0 < X < 1
1 < X < oo
we know xb — 177.3 and Vq — 1.135 m/s.
X = x/xb (1)
Dist from Shore (m)
(2) = (1) x xb
v/vo (3)
Longshore velocity
V = Col(3) x vo
m/sec
0.1
17.73
0.17990211
0.20418889
0.2
35.46
0.32112706
0.36447921
0.3
53.19
0.42806967
0.48585908
0.4
70.92
0.50282289
0.57070398
0.5
88.65
0.54676862
0.62058238
0.6
106.38
0.56093082
0.63665648
0.7
124.11
0.54611816
0.61984411
0.8
141.84
0.50299594
0.57090039
0.9
159.57
0.43212749
0.4904647
1
177.3
0.333
0.377955
1.1
195.03
0.24197959
0.27464684
1.2
212.76
0.18079527
0.20520263
1.3
230.49
0.13827192
0.15693863
1.4
248.22
0.10787364
0.12243658
1.5
265.95
0.08561276
0.09717049