Day: August 10, 2013

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


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 Read the rest

3 Types of Subcatchment Flow in SWMM 5

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 subarea Read the rest

H2OMAP Sewer and InfoSewer DB Queries to find Loading Manholes

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 Read the rest

Siphon Simulation in SWMM 5 and InfoSWMM

Subject:  Siphon Simulation in SWMM 5 and InfoSWMM 

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 condition can be Read the rest

Aquifers in SWMM 5

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 Read the rest

InfoSWMM Pump Summary Table

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 Read the rest

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


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 Read the rest

InfoSWMM Report Manager and Field Statistics

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 Read the rest

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

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

SWMM 5 QA and Application Manuals on the EPA Web Site

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


The EPA Web Site has three manuals that you can download at


1.   SWMM Applications Manual

2.   SWMM 5 Quality Assurance Report

3.   SWMM 5 Users Manual


via Blogger the rest

Infiltration Data in SWMM 5

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

Read the rest

Aquifer and Groundwater Objects in SWMM 5


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

Read the rest

SWMM 5 Culvert Data from FHWA, HDS No. 5, Hydraulic Design of Highway Culverts, 1985

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

Read the rest

Three Hidden Secrets to Speeding up your SWMM 5, H2OMAP SWMM or InfoSWMM Model


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

Read the rest

Elevation Interpolation from a Contour in H2OMAP SWMM

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.




1.   Make a Contour Plot of the Node Invert Elevations.

2.   The Created Contours are now

Read the rest

How to see what you have in the various scenarios of InfoSWMM

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

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