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How do I model a gate valve opening and closing based on a logic such as pressure at a pressure transducer? (water level in an upstream manhole for example)
This must be done using the Explicit (SWMM) calculation engine selected in your calculation options. Then, define a start control structure on your downstream conduit such as an orifice and give it a SWMM label(such as OR).
Next, Go to Components > SWMM Extensions > Controls sets. In here you will need to define two control rules; one to set the setting of the orifice to 0 when the level reaches the point when the gate should close, and another to set the setting to 1 when the orifice should be fully open. For example:RULE AIF NODE WW-1 DEPTH <= 0.1THEN ORIFICE OR SETTING = 0}RULE BIF NODE WW-1 DEPTH > 3THEN ORIFICE OR SETTING = 1
Using SWMM Control Sets in SewerGEMS and CivilStorm
Conduit start/stop control structures