Infiltration Data in SWMM 5

Subject:  Infiltration Data in SWMM 5

Infiltration Data in SWMM 5 by dickinsonre Subject:  Infiltration Data in SWMM 5 If you are using Non linear Reservoir Modeling in SWMM 5 there are 1.   Five parameters for Horton Infiltration, 2.   Three parameters for Green-Ampt and 3.   Two parameters for CN infiltration, one parameter (conductivity) has been deprecated by the EPA in SWMM 5.   The Drying Time is used to regenerate the Infiltration Rate for continuous simulation.  Only two parameters are now used for CN infiltration:  The CN value itself and the drying time.    via Blogger http://www.swmm5.net/2013/08/infiltration-data-in-swmm-5.html

A feedback loop involves four distinct stages

A feedback loop involves four distinct stages. First comes the data: A behavior must be measured, captured, and stored. This is the evidence stage. Second, the information must be relayed to the individual, not in the raw-data form in which it was captured but in a context that makes it emotionally resonant. This is the relevance stage. But even compelling information is useless if we don’t know what to make of it, so we need a third stage: consequence. The information must illuminate one or more paths ahead. And finally, the fourth stage: action. There must be a clear moment when the individual can recalibrate a behavior, make a choice, and act. Then that action is measured, and the feedback loop can run once more, every action stimulating new behaviors that inch us closer to our goals, From Wired Magazine http://www.wired.com/magazine/2011/06/ff_feedbackloop/all/1

Status Report Bookmarks in SWMM 5.0.022

Subject:  Status Report Bookmarks in SWMM 5.0.022

RPT File BookMarks for SWMM5

SWMM 5 Slope Rules are Critical to Understand for Short Pipes

Subject:  SWMM 5 Slope Rules are Critical to Understand for Short Pipes

If you have a short pipe and an significant offset depth for the pipe at either the upstream or downstream end of the pipe then the difference between the arithmetic method of calculating the slope and the SWMM 5 method can be noticeably different. 

Three Inertial Term Options in SWMM 5 and InfoSWMM/H2OMAP SWMM

Subject:  Three Inertial Term Options in SWMM 5 and InfoSWMM/H2OMAP SWMM

Three Inertial Term Options in SWMM 5 and InfoSWMM/H2OMAP SWMM by dickinsonre Subject:  Three Inertial Term Options in SWMM 5 and InfoSWMM/H2OMAP SWMM The dynamic wave flow in SWMM5 and InfoSWMM is calculated from the following equation Q  =   (Qold – dq2 + dq3*sigma +  dq4*sigma ) / ( 1  + dq1 + dq5) Where, Qold               =         Last Time Step Flow in the Link dq1                 =         friction loss term dq2                 =         water suface slope + bed slope term dq3                 =         midpoint area non linear term dq4                 =         upstream and downstream area non linear term dq5                 =         Entrance, Other and Exit Loss Term sigma            =         function of the Froude number and a function of the Three Intertial Term Options Figure 1 shows how Sigma is set based on the user selection of the Three Intertial Terms.  Figure 2 shows how Sigma is calculated for the Dampen Option.  If you use Ignore then dq3 and dq4 are ignored all of the time, if you use Dampen then dq3 and dq4 are used for a Froude number less than 0.5 and then the terms gradually fade away until a Froude number of 1 is reached.   If you use Keep then the non linear terms are used all of the time no matter the value of the link Froude Number. There is one exception to this rule: If a closed link is full then the value of sigma is set to 0.0 no matter what is selected for the Intertial Term. Figure 1.  The value of Sigma for each of the Three Inertial Term Options in SWMM 5 and InfoSWMM/H2OMAP SWMM Figure 2.  At each iteration for each link during the simulation the link Froude Number is calculated and based on the Froude Number the value of Sigma is Set. via Blogger http://www.swmm5.net/2013/08/three-inertial-term-options-in-swmm-5.html

SWMM 5 QA and Application Manuals on the EPA Web Site

Subject:   SWMM 5 QA and Application Manuals on the EPA Web Site

SWMM 5 QA and Application Manuals on the EPA Web Site by dickinsonre Subject:   SWMM 5 QA and Application Manuals on the EPA Web Site The EPA Web Site has three manuals that you can download at http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/#Downloads 1.   SWMM Applications Manual 2.   SWMM 5 Quality Assurance Report 3.   SWMM 5 Users Manual via Blogger http://www.swmm5.net/2013/08/swmm-5-qa-and-application-manuals-on.html

How to Make a Small Model out of a Large Model in H2OMAP Sewer

Subject: How to Make a Small Model out of a Large Model in H2OMAP Sewer

How to Make a Small Model out of a Large Model in H2OMAP Sewer and InfoSewer by dickinsonre Subject:  How to Make a Small Model out of a Large Model in H2OMAP Sewer The process is easy if you use Domain and Facilities.   Step 1.  Use the Trace Upstream Network Command in Utilities to find the upstream network from your node of interest.  The upstream network is saved to a Domain. Step 2.  Use the Facility Manager to 1st deactivate the whole network and then 2nd to add the Domain to your Facility or the nodes and links that you will simulate You now have a smaller network to examine in Detail.  You may have to make a temporary Outfall node to run the model if there are no Outfalls in the model. via Blogger http://www.swmm5.net/2013/08/how-to-make-small-model-out-of-large.html

InfoSWMM Pump Operation Curve and Time Off Curve

Subject: InfoSWMM Pump Operation Curve and Time Off Curve

The InfoSWMM pump operation curve will show you over time the relationship between the head of the pump and the pump flow. The pump summary table will also tell you how often the pump head was higher than the High Head of the Curve and how often the pump head was lower than the Low Head of the Curve. If you replay the animation the purple square will move up and down the pump curve.

Dry Weather Flow in SWMM 5

Subject:   Dry Weather Flow in SWMM 5

Dry Weather Flow in InfoSWMM and H2OMap SWMM by dickinsonre Dry Weather Flow in InfoSWMM and H2OMap SWMM  Dry weather flow can be added to any node in H2OMAP SWMM.  The dry weather flow is computed as the average flow * the monthly pattern * the daily pattern * hourly pattern * the weekend daily pattern to give the Dry Weather Flow at any time step (Figure 1).   Since the four types of patterns (Figure 2) are all multiplied together then for Saturday and Sunday the hourly pattern and the weekend hourly pattern will both be used.   This will have the effect of overestimating the flow if the multipliers are greater than 1 and underestimating theflow if the multipliers are less than one.  You should enter the  Pattern X for the Weekend Hourly Pattern in H2OMAP SWMM  where  X  = Weekend Hourly Pattern / Hourly Pattern  So that when the pattern X is multiplied by the Hourly Pattern the program will use the intended Weekend Pattern.  Figure 1.  How Dry Weather Flow is Computed in H2OMAP SWMM Figure 2.  The Four Types of Time Patterns in H2OMAP SWMM, InfoSWMM and SWMM 5  via Blogger http://www.swmm5.net/2013/08/dry-weather-flow-in-infoswmm-and-h2omap_10.html

InfoSWMM Report Manager and Field Statistics

Subject:  InfoSWMM Report Manager and Field Statistics

InfoSWMM Report Manager and Field Statistics by dickinsonre Subject:  InfoSWMM Report Manager and Field Statistics  You can also use the mixed graph feature to plot the pump flow and the downstream flows on the same graph.  If you click on the Report command then you can also use aField Statistics command to see the Statistics for each Link and Pump.   The right mouse button for the Report also allows you to make a scatter plot and graph the flows in theforcemains versus the flows in the pumps.     via Blogger http://www.swmm5.net/2013/08/infoswmm-report-manager-and-field.html

How to use the Report Feature of the HGL Plot in InfoSWMM

Subject:   How to use the Report Feature of the HGL Plot in InfoSWMM

How to use the Report Feature of the HGL Plot in InfoSWMM by dickinsonre Subject:   How to use the Report Feature of the HGL Plot in InfoSWMM The report feature of the HGL plot helps you understand in more detail the pump flows, forcemain flows and node heads. Step 1. Load the Domain in the HGL Plot using Report Manager Step 2. Click on the Report Command to Show the HGL Data in Tabular Format Step 3.  Format the Results Table from the HGL Plot to see the data better. Step 4.  Now we have the heads, flows and velocities for the pumps, nodes and force main links in our Domain around the pump of interest at time steps of 2 seconds,  We can now see how the flows, heads and velocities change downstream from the pump. Step 5.  Force Mains, Nodes and Pumps in our Table Step 6.  The pump turns on and the flow moves downstream to the force mains – the heads in the nodes increase to balance the flow at each node.  As you can see there is a 1 to 2 GPM decrease due to attenuation as the flow from the pump moves into the force mains. Step 7.  The pump turns off and flows downstream decrease.  You can get negative flow if the downstream head is higher than the upstream head of the link. Step 8.  Use Advanced Labeling and the HGL Plot Stepping Interval to see all of the data in your Plot. via Blogger http://www.swmm5.net/2013/08/how-to-use-report-feature-of-hgl-plot.html

How to Use Domain Manager in InfoSWMM to Reduce the Output File Size

Subject:   How to Use Domain Manager in InfoSWMM to Reduce the Output File Size

How to Use Domain Manager in InfoSWMM to Reduce the Output File Size by dickinsonre Subject:   How to Use Domain Manager in InfoSWMM to Reduce the Output File Size If you want to save the output at a small report time step (2 seconds in this case) and you have a long simulation or large model then the reading of the graphicalo results may not be as speedy as you want.  You can save ONLY the DOMAIN to the output binary file however to make this smaller and faster to react. Step 1.  Define your Reporting Time Step and Your Routing Time Step.  In this case we are routing at 1 second but saving the DOMAIN results every 2 seconds. Step 2.  Clear your existing DOMAIN and Create a DOMAIN based on the area you are most interested in during the simulation. Step 3.  Use the Advanced Tab in Run Manager and select Domain as the Output Scope – this will save only the Domain to the output binary file. Step 4.  Run the simulation using Run Manager and then look at the output.  You are restricted to 8800 graph points but the number of points in the Report Table is unlimited. Step 5. You can use the Data Plot Option (right mouse click) to see a subset of the larger than 8800 data points.   via Blogger http://www.swmm5.net/2013/08/how-to-use-domain-manager-in-infoswmm.html

 

InfoSWMM and H2OMAP SWMM Pump Summary Table

Subject:   InfoSWMM and H2OMAP SWMM  Pump Summary Table

InfoSWMM Pump Summary Table by dickinsonre Subject:   InfoSWMM Pump Summary Table The Pump Summary Table in Report Manager tells you how often the pumps turn on (Start-Up Count), the percent of the simulation time it was used (Percent Utilized) and the maximum, minimum and average flow for the pumps. You can also see flows in the downstream links from the pumps in the force mains along with the pumps.   If you use the Mixed Graph Control you see the Pump flows and Link Flows on the same Graph You can control the replay of the HGL Plot by altering the stepping time in Graph Settings via Blogger http://www.swmm5.net/2013/08/infoswmm-pump-summary-table.html

How to Set Up Hot Start Files in InfoSWMM for a Fixed Boundary Outfall

Subject:  How to Set Up Hot Start Files in InfoSWMM for a Fixed Boundary Outfall

How to Set Up Hot Start Files in InfoSWMM for a Fixed Boundary Outfall by dickinsonre Subject:  How to Set Up Hot Start Files in InfoSWMM for a Fixed Boundary Outfall If you have a fixed boundary outfall condition in your model and want to prevent reverse flow when you run your simulation the best way is to use the Hot Start files to fill up the links and nodes at the start of the simulation. 1st Step:  Turn off the DWF inflow so that ONLY the flow from outfall enters the network.  Use the Process Models in Run Manager to turn off and turn on the Dry Weather flow. 2nd Step:  Run the simulation first SAVING a Hot Start File using zero initial node depths and link flows. 3rd Step:  Save and Use Hot Start Files until the initial and final volume in your Network stays the same.  4th Step:  Check the Initial and Final Stored Volume in the output text file 5th Step:  Check to see if you nodes are stable by using a Junction Group Graph 6th Step:  Now Run the Simulation with flows turned an and the network will start out with the Boundary Condition depths and stable flows via Blogger http://www.swmm5.net/2013/08/how-to-set-up-hot-start-files-in.html

How to Set a Flap Gate in InfoSWMM

Note:  How to Set a Flap Gate in InfoSWMM

How to Set a Flap Gate in InfoSWMM by dickinsonre Note:  How to Set a Flap Gate in InfoSWMM You can set a flap gate in InfoSWMM either by using the attribute browser and changing the Flap Gate Installed to Yes or No or by using the DB Editor and changing the Flag for Flap Gate Installed to Yes by using the Block Edit tool.   The DB method is better for changing many conduits.  via Blogger http://www.swmm5.net/2013/08/how-to-set-flap-gate-in-infoswmm.html

H2OMAP Sewer and InfoSewer DB Queries to find Loading Manholes

Subject:   H2OMAP Sewer and InfoSewer DB Queries to find Loading Manholes

H2OMAP Sewer and InfoSewer DB Queries to find Loading Manholes by dickinsonre Subject:   H2OMAP Sewer and InfoSewer DB Queries to find Loading Manholes This Database Query (DB) will find all loading Manholes with a Load1 and a Load2 greater than 0.  InfoSewer has up to ten possible loads in a Manhole.  You can use the DB Query (Figure 1) to create a Query Report to show all of the Manholes with a non zero loading for both Load1 and Load2.  New Queries can be made to show any combination of the ten Manhole Loadings either by altering the DB Query or creating a new DB Query. Figure 1. DB Query to find Manholes with Load1 and Load2 greater than 0.0  Figure 2.  Query Report for the DB Query  via Blogger http://www.swmm5.net/2013/08/h2omap-sewer-and-infosewer-db-queries.html