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 … Read the rest
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… Read the rest
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
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
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 inlet control equation flow is less than the computed St Venant flow then the FHWA equations will be used
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 Step 4.821
Use a maximum time that will lower your average iterations per time step to
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.
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Steps |
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1. Make a Contour Plot of the Node Invert Elevations. |
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2. The Created Contours are now |
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 … Read the rest
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 … Read the rest
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 area of a Subcatchment during a simulation. The parameters are:
· Soil Moisture = IMD Max – … Read the rest
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 … Read the rest
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 Height Value in the SWMM 5 Weir Property Dialog (Figure 1) … Read the rest
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 project.
Step 3: Add your subcatchment data using the GIS Exchange Cluster Import
Step 4: Now you have
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 All Nodes NOT Outfalls ( this includes … Read the rest
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 a Pattern of Inflow… Read the rest
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 … Read the rest
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 SWMM (Figure 1)
Low Impact Development (LID) Page 3
Low Impact Development (LID) Page 4
LID Controls and
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 2: Assign a UH to at Least 1 Node Using the Inflow Icon
Step 3: Open Up RDII Analyst
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 to reduce the peak … Read the rest
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 … Read the rest
