After the first 2 hours, the initial backwater profile is changing, so an unscheduled flow change is introduced in the canal modifying some offtake flow, as shown in Table 8.

Table 8

Initial and unscheduled offtake changes on test case 1-2

Pool numberOfftake initial flow (m3/s)Check initial flow (m3/s)Unscheduled offtake changes at 2 hours (m3/s)Check final flow (m3/s)
Heading – 2.0 – 2.0 
0.2 1.8 – 1.8 
0.0 1.8 0.2 1.6 
0.4 1.4 −0.2 1.4 
0.0 1.4 0.2 1.2 
0.0 1.4 0.2 1.0 
0.3 1.1 −0.1 0.8 
0.2 0.9 – 0.6 
0.9 0.0 −0.3 0.0 
Pool numberOfftake initial flow (m3/s)Check initial flow (m3/s)Unscheduled offtake changes at 2 hours (m3/s)Check final flow (m3/s)
Heading – 2.0 – 2.0 
0.2 1.8 – 1.8 
0.0 1.8 0.2 1.6 
0.4 1.4 −0.2 1.4 
0.0 1.4 0.2 1.2 
0.0 1.4 0.2 1.0 
0.3 1.1 −0.1 0.8 
0.2 0.9 – 0.6 
0.9 0.0 −0.3 0.0 

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