WARNING 04: minimum elevation drop used for Conduit - What Does this Message Mean in SWMM 5?
Subject: WARNING 04 : minimum elevation drop used for Conduit - What Does this Message Mean ? This message means that the elevation drop across the link is less than the minimum allowable drop or ( 0.001 /3.048 meters) Elevation1 = Link Offset Upstream + Upstream Node Invert Elevation2 = Link Offset Downstream + Downstream Node Invert Internally Elevation1 – Elevation2 should be greater than 0.001 /3.048 meters. If it is not then SWMM 5 or InfoSWMM will use the minimum drop or 0.001 /3.048 meters It simply is a rule that does not allow flat slopes as the flat slopes mean no normal flow calculations. You should not have to worry about this warning message . Here is an example of a conduit in which the rule is applied. The rul...