112
4. Application
of the Optimisation
Algorithm
Table 4.2c
Network Data for the Two-Period System—Exit Flows
Limits**
Arc
Nodes
Cost
number
(i-j)
coefficient*
1 c#
High
Low
Comments
109
41-240
6
0
20
20
110
44-240
0
15
15
111
54-240
0
0
0
112
56-240
0
9
9
113
61-240
0
0
0
114
62-240
0
30
30
115
67-240
0
0
0
116
68-240
0
40
40
117
32-240
0
400
0
118
72-240
0
400
0
119
17-240
0
20
0
120
20-240
0
40
0
121
23-240
0
30
0
122
25-240
0
90,000
0
123
29-240
0
50
0
124
31-240
0
90,000
0
125
57-240
0
20
0
126
60-240
0
30
0
127
63-240
0
40
0
128
65-240
0
150
0
129
69-240
0
50
0
130
71-240
0
350
0
131
240-239
0
90,000
0
"Final" reservoir
conditions
Exit flow (Period 1)
Exit flow (Period 2)
Exit irrigation flows
α All upper and lower flow limits are in 10
4 acre-ft. All costs are in S/acre-ft.
b As in other tables.
transform the OP problem from a minimum-cost circulation problem to
one of circulation at maximum revenue. It should be noted that no irrigation revenue is obtainable in the winter season and also that energy revenues are higher in winter than in summer.
Nodes 239 and 240 are the source and sink nodes, respectively. Note
that the unregulated flow inputs to the system (arcs 1-10 and 63-72) and
the original reservoir levels (arcs 11-18) originate from the source node