Introduction: This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at http://swmm2000.com/forum/topics/1000-year-simulation-with-rainfall-in-swmm-5 to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM […]
From the great blog and website, IO9, an explanation about the why it smells so nice after a rainfall What really causes that amazing “after the rain” smell? After a rainstorm, especially […]
Note: What Node and Link Invert Elevations Does SWMM 5 Use? SWMM 5 uses the following Node information from the user: · Node Invert Elevation, · The Node Rim Elevation which is […]
InfoSWMM Error Messages and Arc Map Invalid Characters A few other invalid characters are shown here in addition to the space character. The Arc Map Link is http://www.esri.com/news/arcuser/1010/joinvalidate.htmlif you want more information. […]
Press Room | Products | News | Events | The Company UK Environment Agency Study Confirms Leading Capabilities of InfoWorks ICM Innovyze Smart Integrated Catchment Solution Excels in Examination of Two-Dimensional Modeling Solutions Broomfield, Colorado, USA, August 20, 2013 — Innovyze, a […]
Vacuum Sewers Compiled by: Beat Stauffer (seecon international gmbh) Source: http://www.sswm.info/category/implementation-tools/wastewater-collection/hardware/sewers/vacuum-sewers Executive Summary Vacuum sewerage systems consist of a vacuum station, where the vacuum is generated, the vacuum pipeline system, collection chambers […]
Subject: How RTC Rules are Set in SWMM5, InfoSWMM and H2OMAP SWMM
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 […]
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 […]
Subject: 3 Types of Subcatchment Flow in SWMM 5 There are three types of Subcatchment flow in SWMM 5 1. Impervious area with depression storage in which the runoff from the precipitation is delayed due to the depression storage. Evaporation occurs based on the depth of water in the […]
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 […]
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 […]
Subject: SWMM 5 Arrow Direction Question A question often asked is what happens to the flow in a SWMM 5 link if the downstream and upstream node names are entered in reverse. The flow will be exactly the same as if the […]
Subject: SWMM 5, H2OMap SWMM and InfoSWMM Time Step Guide If you use a variable time step in SWMM 5 or InfoSWMM/H2OMAP SWMM it is hard to gauge the proper value of the conduit lengthening. You want to use a value […]
Subject: Siphon Simulation in SWMM 5 and InfoSWMM A Siphon is simulated in SWMM 5 and InfoSWMM using the basic node and link data and downstream boundary condition: 1. Inflow can be time series, dry weather flow pattern, wet weather inflow or Subcatchment Runoff, 2. The boundary […]
Subject: Aquifers in SWMM 5 Groundwater in SWMM 5 is modeled as two zones: (1) Saturated and (2) Unstaturated. The data for the Groundwater Simulation consists of physical data in an Aquifer and elevation and flow coefficient and exponent data in the GroundwaterData. The Aquifer data object can […]
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 […]
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 […]
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 […]
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 […]
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 […]
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
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 […]
Subject: Aquifer and Groundwater Objects in SWMM 5 There are two types of data objects in SWMM 5 to describe the Groundwater flow component. There is a Groundwater data object associated with a Subcatchment that describes flow equations, the interaction between the Subcatchment infiltration and the Groundwater component and an Aquifer data […]
Subject: SWMM 5 Culvert Data from FHWA, HDS No. 5, Hydraulic Design of Highway Culverts, 1985 If you use the culvert option in later versions of SWMM 5 then when the […]
Minimum Time Step Average Time Step Maximum Time Step Minimum Time Step (sec) 0.984 Average Time Step (sec) 9.071 Maximum Time Step (sec) 30.000 Percent in Steady State (%) 0.000 Average Iterations per Time […]
Subject: Elevation Interpolation from a Contour in H2OMAP SWMM The node invert elevation or the node maximum depth can be interpolated if you use the Elevation Interpolation Tool inH2OMAP SWMM. Steps Action 1. Make a Contour Plot of the Node Invert Elevations. 2. The Created Contours are […]
Subject: How to see what you have in the various scenarios of InfoSWMM How to see what you have in the various scenarios – a tool I use a lot is Scenario Explorer which shows you how to see thevarious datasets associated with a data set along with the relationship between the Base and Various Child Scenarios. […]
Subject: SWMM 5 Inlet Control Culvert Equations The newer option for SWMM 5 culverts uses three culvert classifications and associated equations to compute the inletcontrolled flow into a culvert using the FHWA (1985) equations. The culvert code in the culvert.c code of SWMM 5 uses: 1. Two Equations for Unsubmerged culvert flow, 2. One Equation for the Transition flow, and 3. One Equation […]
Subject: How Does the Green Ampt Initial Moisture Defiict Work in InfoSWMM and SWMM 5? This graph shows the values of the internal SWMM 5 parameters for Green Ampt Infiltration for the pervious […]
High and Low Estimates of ICM Subcatchment Dimension for SWMM Hydrology These are the estimates for both SWMM 5, InfoSWMM and ICM SWMM Hydrology, the low estimate is 0.2*SQRT(Area in Feet) and the High Estimate is 5*SQRT(Area in Feet), Figure 1. You can use higher or lower numbers to calibrate to monitored […]
How do V-notch weirs work in SWMM 5? Hi Keith, As you change the Length which is actually the Top Width you change the area and hydraulic radius of the Weir. The height of a V-Notch weir is the […]
How to Import Subcatchments from GIS into InfoSWMM Step 1: Add your shapefile using the Add Data command. Step 2: Your imported shape file has no subcatchment data before we initialize the […]
How are Flooded Time, Surcharged Time and Flooded Volume Calculated in InfoSWMM and H2OMAP SWMM? The time, volume and flooded rate shown in the InfoSWMM and H2OMAP SWMM Report File Node Flooding Summary (Figure 2) are calculated as follows (Figure 1): For […]
This is how InfoSewer can use a time series of inflow at a specific node: 1. Use a mean loading of 1 so that the values in the Inflow Time Series stay the same as your inflow units in InfoSewer (Figure 1) Figure 1. Load with […]
How to Use the Map Display for the Maximum Adjusted d/D or Maximum q/Q in an EPS InfoSewer Simulation You can do a Map Display of the adjusted d/D values (Figure 1) from the Gravity Main Range Report (Figure 2) to show those pipes that are full thematically. For example, the […]
Subject: LID and BMP Modelling in InfoSWMM and H20Map SWMM The attached PDF file describes some of the Low Impact Modeling and Best Management Practice modeling options in InfoSWMM and H2OMap […]
Subject: Steps in Using RDII Analyst for InfoSWMM, ICM and InfoSewer Step 1: Create a Base UH in the Operation Tab of the Attribute Browser using RDII Analyst (Figure 1) Step […]
InfoSewer Flow Attenuation Sensitivity The three Run manager parameters, Maximum Number of Segments, Minimum Travel Distance and the Minimum Travel Distance in InfoSewer and H2OMAP Sewer affect the shape and flow attenuation of the flow in a link. The effect of using the flow attenuation is […]
InfoSWMM 2D Report Variables The Junction Graph variables for 2D Depth, 2D Speed, 2D Froude Number, 2D Unit Flow, 2D Inflow, 2D Volume and 2D Angle for a InfoSWMM 2D simulation for up to 1000 years can be plotted in the Report Manager of InfoSWMM. This is an image of the 2D inflow over a 10 year period […]
Subject: How are Negative Transect Elevations Used in SWMM5? You can have negative elevations in the Transects of SWMM 5 as the elevations are transformed internally to relative depths above the node inverts in the SWMM 5 engine (Figure 1). The slope […]
Subject: How Does Green Ampt Cumulative Event Infiltration work in SWMM 5? This graph shows the values of the internal SWMM 5 parameters for Green Ampt Infiltration for the pervious area of a Subcatchment during a simulation. The parameters are: · F or FTOT which is the cumulative event infiltration at the […]
Subject: How is Capillary Suction Head Used in SWMM 5 Green–Ampt? How sensitive is the infiltration loss and rate to the capillary suction head parameter in the SWMM 5 Green–Ampt infiltration method. Figure 1 shows how the total infiltration loss and total loss rate vary as […]
Subject: How is the Soil Saturated Conductivity Used in SWMM 5 Green–Ampt? How sensitive is the infiltration loss and rate to the Soil Saturated Conductivity parameter in the SWMM 5 Green–Ampt infiltration method. Figure 2 shows how the total infiltration loss and total loss rate vary as […]
There are Four factors in Rainfall Dependent Infiltration and Inflow or RDII in SWMM 5: 1. The fractional response to Rainfall or R from 0 to 1 2. The Time Base of the Unit Hydrograph or T in hours * Dimensionless K Shape Factor 3. The Sewershed Contributing Area in […]
Subject: How is RDII Storage Simulated in SWMM 5? If you are using the SWMM 5 Rainfall Dependent Infiltration and Inflow(RDII) feature you can also use the RDII storage parameters to change the RDII runoff by simulating the storage in the Sewershed. The code in RDII.C as implemented […]
Note: Types of Stormwater Inlets from HEC12 and HEC22 Stormwater Inlets consist of four main types (http://onlinemanuals.txdot.gov/txdotmanuals/hyd/storm_drain_inlets.htm) with most common shown in Figure 1. 1. Curb opening inlets either at a sag or continuous on the street, 2. Grate Inlets either at a sag or in combination with […]
Subject: How to Easily Make a Smaller Model in InfoSWMM Using Trace Upstream Network Step 1. Use the Trace Upstream Network command to find all of the network above the node of interest (Figure 1). Step 2. Use the Trace Downstream Network Command to find all of the network below the node of interest […]
Subject: How to Subdivide Subcatchments in SWMM 5 If you want to subdivide a larger Subcatchment in SWMM 5 and get around the same peak flow then a good suggestion would be to make sure that (Figure 1): 1. The sum […]
Subject: What are the Types of Force Mains (FM) in SWMM 5? There are five ways to model a force main in SWMM 5 for the combination of full and partial flow in the force main (Figure 1): 1. Full Flow using Darcy-Weisbach for the […]
Subject: How Does a TYPE1 Pump Work in SWMM 5? A SWMM 5 Type1 pump is called an offline pump but the name comes from SWMM 4 and the Pump is […]
Subject: How is the Orifice Setting Used in SWMM 5 RTC Rules? The Real Time Control Rule for Orifice Setting can be a function of a Setting constant, Setting from a Curve, Setting from a PID controller and a Setting from a Time Series (Figure 1). The Setting affects the Full Depth […]
Subject: Low Impact Development Options in H2OMAP SWMM and InfoSWMM The five options are: 1. Rain Barrel 2. Bio Retention Cell 3. Infiltration Trench 4. Vegetative Swale 5. Porous Pavement and be entered as controls in the Hydrology Section of the Operations Browser of H2OMAP SWMM or InfoSWMM (Figure 1) […]
Subject: Rules for NRSCS Unit Hydrographs in InfoSWMM and H2OMap SWMM Rules or Guidelines for NRSCS Unit Hydrographs if used as the Hydrology Option in InfoSWMM and H2OMAP SWMM: 1. The Unit Hydrograph CN comes from the Subcatchment Table and the NRCS_CN Column 2. Time of Concentration is from the TC column in […]
Subject: How to Export all of your Data to a Shapefile Using InfoSWMM You can do this easily by using three steps which are shown in Figure 1, Figure 2 and Figure 3. Figure 1. Export Manager Tool Figure 2. Link and […]
Subject: How to use the Flow Splitter in InfoSewer for Dendritic Networks InfoSewer, which is an extension in Arc Map, does need to have slit split defined where gravity mains merge together to determine the amount of flow in each of the […]
Subject: A SWMM 5 Model made from the Art of Jack Yerka The attached example SWMM 5 model has small rectangular conduits with a constant inflow based on a background image […]
How to Save Node and Link Summary Tables in H2OMAP SWMM to Shapefiles The export manager of H2OMAP SWMM is very flexible, you can export shape, MIF and CSV files but you have to do some copy and pasting to allow the program to export ALL […]
How to Use the Output Relate in Excel using H2OMAP SWMM You have to perform the following steps: 1. Make an Output Relate (using the Operations Tab of the H2OMAP SWMM Browser) which will be the same as the Pipe Summary Table in the Output Report Manager2. Run the model to make […]
Advanced Labeling in InfoSWMM or H2OMAP SWMM to show MM or IN on a HGL Plot Here is how to get the maximum depth shown in millimeters or inches on a HGL Plot in InfoSWMM or H2OMAP SWMM– use the OTHER LINK Dimensions option. You need to run the model again […]
Subject: How to Use Two Control Curves in SWMM 5 to Simulate a Head Difference Rule The SWMM 5 control rules for Real Time Control (RTC) do not allow the rule […]
Advanced Labeling in InfoSWMM or H2OMAP SWMM to show MM or IN on a HGL Plot Here is how to get the maximum depth shown in millimeters or inches on a HGL Plot in InfoSWMM or H2OMAP SWMM– use the OTHER LINK Dimensions option. You need to run the model […]
The SWMM 4 Dynamic Wave Solution The attached PDF file is a copy of Appendix C of the SWMM 4 manual explaining the three St Venant solutions in SWMM 4 / Extran […]
The SWMM 4 Dynamic Wave Solution for ISOL=0 The attached PDF file is a copy of the Extran 3 solution in the SWMM 4 manual explaining the ISOL=0 solution in SWMM 4 […]
Continuous Simulation using SWMM 5 LID and Groundwater Features in a Linked 1D/2D Network using InfoSWMM 2D for a 50 Year Period A poster at the recent ECI conference on the […]
How to Create an InfoSWMM model from CSV Files An InfoSWMM model can be newly created from a CSV file but it helps to have a background map or shapefile to initialize the Arc Map project. BEFORE initializing yourInfoSWMM map Add a data layer […]
InfoSewer Minimum Travel Time Sensitivity The three Run manager parameters, Maximum Number of Segments, Minimum Travel Distance and the Minimum Travel Time in InfoSewer and H2OMAP Sewer affect the shape and flow attenuation of the flow in a link. The effect of decreasing the Minimum Travel Time is […]
How to Create an InfoSWMM model from CSV Files, Alternate Method An InfoSWMM model can be newly created from a CSV file but it helps to have an idea of the maximum extents before you initialize the Arc Map project. Use the ArcGIS default and […]
The Structure of InfoSWMM in Arc Map via Blogger http://www.swmm5.net/2013/08/the-structure-of-infoswmm-in-arc-map.html
Siphon Modeling in InfoSewer and Arc Map Here is at typical view of a siphon in InfoSewer, the rising links have a d/D of 1 and the dropping links typically have a d/D value less than 1. The q/Q for […]
InfoSewer By Discharge Control for a PUMP You can control the pumps in InfoSewer and H2OMap Sewer by using a Pump Control which will control the pump based on: 1. Volume2. Level3. Discharge4. Inflow5. Time If you use a By Discharge control the pump speed of the pump is increased or decreased to pump the incoming Wet Well flow based on the pump rules […]
SWMM 4 and SWMM 5 St. Venant Solutions Contrasted 1. Compute at time t+delta t the values of dQ/dt for the Links and dH/dt for the Nodes from the properties at time t 2 Iterate at least 2 times until either all […]
InfoSewer Inflow Control for a PUMP You can control the pumps in InfoSewer and H2OMap Sewer by using a Pump Control which will control the pump based on: 1. Volume 2. Level 3. Discharge 4. Inflow 5. Time If you use a By Inflow control the pump speed of the pump is increased or decreased […]
InfoSewer Maximum Number of Segments Sensitivity The three Run manager parameters, Maximum Number of Segments, Minimum Travel Distance and the Minimum Travel Distance in InfoSewer and H2OMAP Sewer affect the shape and flow attenuation of the flow in a link. The effect of decreasing the […]
Singapore – Catching Every Drop of Rain The source of the map of the rivers of Singapore is the Singapore PUB As a small island that doesn't have natural aquifers and lakes and with little land to […]
How to Make an Excel Fixed Width File from SWMM 5 You can use this macro for MATLAB or some other DOS based program by using the Tools command of SWMM 5 and configuring the EXCEL file option. If you use the EXCEL tool then your SWMM 5 input file will be opened up […]
Maximum HGL Head Class in InfoSWMM AND H2OMAP SWMM You can find the node flood or surcharge maximum occurrence during a simulation in the Junction Summary Report table in InfoSWMM and H2OMAP SWMM (Figure 1) Empty if the Node Head is below or equal to the Lowest Link Connecting […]
Subject: Non Linear Term in the Saint Venant Equation of SWMM 5 The flow equation has six components that have to be in balance at each time step: 1. The unsteady flow term or dQ/dt 2. The friction loss term (normally based on Manning's equation except for full force mains), 3. The bed slope term or dz/dx […]
Subject: Successive under-relaxation for the SWMM 5 Dynamic Wave Solution SWMM 5 uses the method of Successive under-relaxation to solve the Node Continuity Equation and the Link Momentum/Continuity Equation for a time […]
The time flooding in SWMM 5 is pretty simple: 1. It is the sum of all time steps in which excess flow is coming out of the top of the manhole or 2. If you are using the ponding option […]
How to Use the SWMM 5 Excel Tool with InfoSewer CSV Files 1. Export Link and Manholes in InfoSewer for your current Scenario to CSV files, 2. Set up the Excel Add on for SWMM 5 by using the command Tools, and Configure Tools (see below) 3. Run SWMM 5 and edit the […]
Subject: How to Have both Depth and Elevation for the Node Rim Elevation in InfoSWMM If you turn on store Absolute Junction Rim option then the Rim Elevation = Invert Elevation + Maximum Node Depth will be shown in the DB Table Junction Hydraulic Modeling Data and the Attribute Browser of InfoSWMM and H2OMAP SWMM […]
Note: How to Use the Arc Map Editor in InfoSWMM Step 1 is to use the Edit Feature for example the Subcatchment layer to bring up the Arc Map Editor Tool. Step 2 is to use the Reshape Feature tool or Vertex tools to bring […]
Twitter besides being 140 characters of greatness has many third party tools such as Tweet Topic Exploreer which allows you to see visually your Tweets by subject, http://tweettopicexplorer.neoformix.com/#n=rdickinson I found it handy to see the interrelationships of […]
Subject: How to use the Flow Splitter in InfoSewer for Dendritic Networks InfoSewer, which is an extension in Arc Map, does need to have slit split defined where gravity mains merge together to determine the amount of flow in each […]
Subject: InfoSewer to InfoSWMM Import Tips The direct import of InfoSewer to InfoSWMM (Figure 1) is both direct and robust but you need to be aware of Run Manager changes to optimize the InfoSWMMmodel: 1. Make sure that the Flow Units in InfoSWMM Run Manager match the […]
Subject: 1000 Year Simulation with Rainfall The attached one Subcatchment SWMM 5 model and associated Rainfall was created using the Random function in Excel on a measured NCD station in Boston. There […]
Arc Map If Statements for Showing Flooding in InfoSWMM You can use a combination of the Map Display in InfoSWMM and the Arc Map Label Properties to show the Maximum Ponded Volume at a node during amInfoSWMM simulation. The label function in VBSCRIPT to show just […]
via Blogger http://www.swmm5.net/2013/08/huff-distribution-swmm-5-model.html
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 […]
This sketch summarizes what happens in a SWMM 5 Subcatchment for Horton Infiltration during a storm event: 1. The event starts out with the potential infiltration rate at the maximum infiltration rate […]
Subject: InfoSWMM (d/D v. Surcharge d/D) What is the difference between the output variables d/D and Surcharge d/D in InfoSWMM and H2OMap SWMM The d/D is calculated as link capacity based on the midpoint depth of water in the link or Link depth/ Link Maximum Depth […]
Subject: How to Use Trace Upstream, Domain Manager and Facility Manager in InfoSewer to Find the CE InfoSewer does not have table of node continuity errors only an overall continuity error balance. If you have a continuity error then you can use the process of divide and conquer […]
Note: Water Age in InfoSewer InfoSewer and H2OMAP Sewer have a Water Quality option called Time of Concentration (TOC) or Water Age that allows the modeler to estimate the residence time in his or her Sewer Network. The use of Water Age is simple, you just pick TOC(AGE) […]
Subject: Modeling H2S in InfoSWMM, ICM and InfoSewer You can model Sulfide in InfoSWMM/ICM and InfoSewer using the H2S water quality modeling option which uses BOD5 loading at nodes to estimate the S concentration in the nodes and links of the […]
Subject: Mass Balance for Water Quality in SWMM 5 The rainfall concentration is listed in the wet deposition row of the Runoff Quality Continuity Table, the washoff such as EMC washoff is listed in the Surface Runoff row. If you are […]
Subject: Mass and Concentration Water Quality Loadings in SWMM 5 If you have a time series of flow and water quality at a node in SWMM 5 you have the option […]
Subject: Convolution of the RDII UH from R, T and K in SWMM 5 The convolution uses the value of R and the Time Base to estimate the amount of Infiltration and Inflow in the Sewer Network. The short, medium and long term UH‘s […]
Subject: What are the Equations for Weirs in SWMM 5, Part 2? There are four types of Weirs in SWMM 5: Transverse, Sideflow, V Notch and Trapezoidal. The trapezoidal weir is a combination of the Sideflow and V Notch Weir and the Sideflow […]
Subject: Water Quality Treatment Removal Variables in SWMM5 The treatment variables for Water Quality in a SWMM 5 storage unit (Figure 1) can be either: 1. A Process Variable a. HRT or Hydraulic Residence Time b. DT or Time Step c. FLOW or The Current Inflow d. DEPTH or […]