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Dear Bob

I am trying to design a pond in SWMM where I want to maintain atleast 1m depth of water before allowing the discharge from the pond. For this I have given 1m initial depth of water in the pond and kept its height as 2.5 m, but while simulating it water is depleting below 1m depth, how is it possible? What could be the error in my model setup ?

Please have a look in the result.