RAS Hydraulic Structure Operation Rule Issue

[Anonymous]

Does anyone have experiences in RAS gate operation using Rules?

The results from my model show that gate opening keeps increasing while the flow keeps constant. Not sure why, but there are tons of water available to be sent to the downstream.

Thanks,

[Vince Moody]

I have used rules quite extensively, and if you have any experience using a programming language or even Excel macros you should be able to get the hang of it. You’ll need to go through the rules line by line and make sure the instructions you’ve included match what you’re trying to do; this can be tedious. If you’re unable to find the problem just by inspecting the rules you can view the results of how the program implements the rules, line by line by time step, in the computation log file (Unsteady Flow Analysis window > Options > View Computation Log File). You’ll likely need to turn on detailed log output under Output Options for Unsteady Flow Analysis.

[Anonymous]

Thank you very much, Vince. I appreciate your help.

I have been using a few different types of programming language. I could have the RAS gate operation rule work fine for the last two years, and I have been viewing the detailed log results.

But recently, the errors came up for the conditions that I could easily handle before. Not sure Why.
(1) scenario 1: The gate flow would not increase and keep almost constant (simulation results) with an increasing in gate opening, or with an wide open gate (Operation rule).
(2) scenario 2: gate keeps small openings (from the modelling results), but the detailed output shows it wide open, which matches with the operation rule set in the RAS.

[Author]

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