Additional Features in InfoSWMM

Subject:   Additional Features in InfoSWMM

The additional features supply the tools for your modeling or modelling:

1.   Dry Flow Allocation for your Sanitary or Combined Sewer Model

2.   Subcatchment Manager to estimate the impervious, slope, width and area of your Subcatchments,

3.   RDII Analyst to estimate the Infiltration/Inflow into your Sanitary Network,

4.   Calibrator to help calibrate the model data to monitored data

5.   Designer to design new links to prevent flooded or surcharge,

6.   InfoSWMM 2D to link your 1D network to a 2D network

7.   CapPlan for Capacity Analysis and Capital Planning,

8.   Pond Design for Stormwater Ponds

SWMM 5 Clocktime RTC Rules for Pumps, Weirs and Orifices

Subject:  SWMM 5 Clocktime RTC Rules for Pumps, Weirs and Orifices

 You can use the Control or RTC rules in SWMM 5 to adjust the settings of the weirs, pumps and orifices based on the clock time each day of your simulation.  Here is an example that will adjust orifice height every ½ hour for 7 orifices at one time using two sets of rules.

 RULE R1a 

; Half hour setting

IF SIMULATION CLOCKTIME = 0:30:00 

OR SIMULATION CLOCKTIME = 1:30:00  

OR SIMULATION CLOCKTIME = 2:30:00 

OR SIMULATION CLOCKTIME = 3:30:00 

OR SIMULATION CLOCKTIME = 4:30:00 

OR SIMULATION CLOCKTIME = 5:30:00 

OR SIMULATION CLOCKTIME = 6:30:00 

OR SIMULATION CLOCKTIME = 7:30:00 

OR SIMULATION CLOCKTIME = 8:30:00 

OR SIMULATION CLOCKTIME = 9:30:00 

OR SIMULATION CLOCKTIME = 10:30:00

OR SIMULATION CLOCKTIME = 11:30:00

OR SIMULATION CLOCKTIME = 12:30:00 

OR SIMULATION CLOCKTIME = 13:30:00  

OR SIMULATION CLOCKTIME = 14:30:00 

OR SIMULATION CLOCKTIME = 15:30:00 

OR SIMULATION CLOCKTIME = 16:30:00  

OR SIMULATION CLOCKTIME = 17:30:00 

OR SIMULATION CLOCKTIME = 18:30:00 

OR SIMULATION CLOCKTIME = 19:30:00 

OR SIMULATION CLOCKTIME = 20:30:00 

OR SIMULATION CLOCKTIME = 21:30:00 

OR SIMULATION CLOCKTIME = 22:30:00

OR SIMULATION CLOCKTIME = 23:30:00

THEN ORIFICE R1 SETTING = 0.90

AND  ORIFICE R2 SETTING = 0.90

AND  ORIFICE R3 SETTING = 0.90

AND  ORIFICE R4 SETTING = 0.90

AND  ORIFICE R5 SETTING = 0.90

AND  ORIFICE R6 SETTING = 0.90

AND  ORIFICE R7 SETTING = 0.90

 

RULE R1b

; hour setting

IF SIMULATION CLOCKTIME = 0:00:00

OR SIMULATION CLOCKTIME = 1:00:00

OR SIMULATION CLOCKTIME = 2:00:00

OR SIMULATION CLOCKTIME = 3:00:00

OR SIMULATION CLOCKTIME = 4:00:00

OR SIMULATION CLOCKTIME = 5:00:00

OR SIMULATION CLOCKTIME = 6:00:00

OR SIMULATION CLOCKTIME = 7:00:00

OR SIMULATION CLOCKTIME = 8:00:00

OR SIMULATION CLOCKTIME = 9:00:00

OR SIMULATION CLOCKTIME = 10:00:00

OR SIMULATION CLOCKTIME = 11:00:00

OR SIMULATION CLOCKTIME = 12:00:00 

OR SIMULATION CLOCKTIME = 13:00:00

OR SIMULATION CLOCKTIME = 14:00:00 

OR SIMULATION CLOCKTIME = 15:00:00

OR SIMULATION CLOCKTIME = 16:00:00

OR SIMULATION CLOCKTIME = 17:00:00

OR SIMULATION CLOCKTIME = 18:00:00 

OR SIMULATION CLOCKTIME = 19:00:00 

OR SIMULATION CLOCKTIME = 20:00:00 

OR SIMULATION CLOCKTIME = 21:00:00 

OR SIMULATION CLOCKTIME = 22:00:00 

OR SIMULATION CLOCKTIME = 23:00:00

THEN ORIFICE R1 SETTING = 0.5

AND  ORIFICE R2 SETTING = 0.5

AND  ORIFICE R3 SETTING = 0.5

AND  ORIFICE R4 SETTING = 0.5

AND  ORIFICE R5 SETTING = 0.5

AND  ORIFICE R6 SETTING = 0.5

AND  ORIFICE R7 SETTING = 0.5

 

Variables for Controlling the Continuity Error in InfoSWMM compared to SWMM 5

Subject:  Variables for Controlling the Continuity Error in InfoSWMM compared to SWMM 5

Time step is always a key parameter in SWMM 5 as it is the main parameter for a user to adjust in case of a significant continuity error.   InfoSWMM has additional flexibility and allows the user to control the number of Picard iterations and the Node continuity stopping tolerance.   SWMM 5.0.022 has the number of iterations fixed at 8 and the stopping tolerance fixed at 0.005 feet.   The stopping tolerance is important because it controls the number of iterations during a time step.  For example, if all of the Nodes have a current and former iteration depth difference (absolute) less than 0.005 feet then the time step is deemed converged and the node and link flow computations are stopped for that time step.  In SWMM 5 since the stopping tolerance is fixed then your main option is to reduce the time step.  In InfoSWMM you can also decrease the stopping tolerance, increase the number of iterations or decrease the time step.  In most models it is best to alter all three parameters for the fastest model.  For example, a slightly smaller maximum time step or a smaller variable time step adjustment factor, more iterations and a smaller tolerance will normally work better than just lowering the time step. 

Hot Start Files are used to define the initial heads and flows

Subject:  Hot Start Files are used to define the initial  heads and flows in the nodes and links of the model.

The creation of the Hot Start File for your sanitary, combined or stormwater network is a three step process: 

1.   Save the 1st Hot Start file using an empty system as the initial conditions,

2.   Use the 1st Hot Start file as the initial condition in the second run and Save the 2nd Hot Start File

3.   In the 3rd Run Use the 2nd Hot Start file as the initial conditions of your network.

4.   It is not necessary that the Hot Start Files be exact in the initial depths or flows but only approximate so that the network in not empty.