Q2 Z2,(Q2) Z2(Q2) - Institute for Water Resources - U.S. Army

Equation (4.37) divides the total :Lim! in a year into the sum of the
tin.o. during which a towboat is actually making trips and the time dur-
ing which it is inactive because of major repairs or lack of business.
From Equation (4.37) running time is the difference between active
time and total delay time.
10
t r = t - t..
a i
i=1
t T y
r
j=1
T r = T f + T a N a + T d N d'
t = t..
o a
i=1
i/l, 6, 9
(4.38)
The aggregate running time may be related to individual trip time by
(4.39)
inwhichT rj is the time required to make the jth trip, and there are
J trips in a year. Note that the previous analysis of the tow in mo-
tion permits the estimation of trip running time.' Repeating Equation
(3.3) above.
(4.40)
i.e., for any given trip, the running time'is the sum of the time dur-
ing which the tow operates at full speed, T f , and the time during
which it is accelerating or decelerating, T aNa + Td Nd .
Define total miscellaneous delay time in a year as
10
(4.41)
110