Benchmark for Hydraulic Models


These Benchmarks have been defined by an ASCE Task Committee [Ref 1]. Two tests have been defined: Mass Conservation Test and Test With Ramp Discharge as Inflow. We provide bellow the results obtained with the previous SIC 2.1 version.

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Mass Conservation Test

The simulation was made on the SIC 2.1 version with the usual parameters: teta = 0.6 and no iterations. They will be run again on the new 3.0 Windows version.

If the results are given in centimeters, the new water elevation all over the canal (after stabilization) is 7.04 m, corresponding to an error of 0.57 % in terms of water elevation or 0.91 % in terms of volume. If the results are given in millimeters, the new water elevation all over the canal (after stabilization) is 7.043 m, corresponding to an error of 0.61 % in terms of water elevation or 0.97 % in terms of volume.

Test With Ramp Discharge as Inflow

For a time step of 10 minutes, some deviations can be seen, compared to the "USM solution", but not really oscillations. For smaller time steps (2 and 1 minutes), the accuracy seems to be very good. Comparison of model outputs for the different time steps are presented in Figure 1.

Figure 1 - Test with ramp discharge


REFERENCE

[1] Dinshaw N. Contractor and Wytze Schuurmans, "Informed Use and Potential Pitfalls of Canal Models", Journal of Irrigation and Drainage Engineering, Vol 119, n 4, July/August 1993.


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