Subject: SWMM 5 Weir RTC Rules
This example SWMM 5 model closes a weir based on the depth at the upstream node of the Weir every 0.25 feet. You can see the effect of the RTC rules using a Scatter plot of Weir Flow versus Weir Depth in SWMM 5 (Figure 1). The Weir flows normally every 0.25 feet but shuts down three times using these rules which set the Weir Setting to 0.0
RULE Weir100
IF Node WeirNode Depth > 1.75
AND Node WeirNode Depth
THEN WEIR WEIR Setting = 0.0
Priority 2
RULE Weir101
IF Node WeirNode Depth > 2.25
AND Node WeirNode Depth
THEN WEIR WEIR Setting = 0.0
Priority 2
RULE Weir102
IF Node WeirNode Depth > 2.75
AND Node WeirNode Depth
THEN WEIR WEIR Setting = 0.0
Priority 2
RULE Weir103
IF Node WeirNode Depth > 3.25
AND Node WeirNode Depth
THEN WEIR WEIR Setting = 0.0
Priority 2
RULE Weir104
IF Node WeirNode Depth > 3.75
AND Node WeirNode Depth
THEN WEIR WEIR Setting = 0.0
Priority 2
Figure 1. Scatter Graph of Weir flow versus Weir Node Depth.