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How to Force SWMM5 to use ONLY the Wet Well area for a Pump

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Problem:  As SWMM5 is a link node network, the area of a Storage Node is both the area of the Wet Well and typically ½ the surface area of the connecting links.  There is no surface area for the Pump(s) downstream of the Wet Well (Storage) but the area of the upstream links will add to the surface area of the Wet Well.   One Answer:  You can eliminate this issue by adding a in a Dummy link to connect the upstream Gravity Main links to the Wet Well. The Dummy link has no surface area and sets the Outflow of the link to the Total Inflow of the Upstream Node to the Dummy link.   The Wet Well will then only have the surface area of the Wet Well.


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An important difference between Capacity d/D and Surcharge d/D in InfoSWMM

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An important difference between Capacity d/D and Surcharge d/D in InfoSWMM, Capacity is based on Area and Surcharge d/D is based on Depth

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How to turn on the option in InfoSWMM to show the SWMM5 RPT file output table for each node, link and Subcatchment

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How to turn on the option in InfoSWMM to show the SWMM5 RPT file output table for each node, link and subcatcment; go to the Report Option dialog (1), turn of report all of report selection list (2) and in the output file you will get a time series of the node, link or subcatchment data for making time series (3).
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How to Compile Older SWMM 5 C Engines in Visual Studio 2012

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As I move from one PC to another and want to go back  and recompile an earlier version of SWMM5 in a newer version of Visual Studio, I often have file issues.  Here is how I cope using the earlier version of SWMM 5 : Use Visual Studio 2012 and make a SWMM 5.1011 directory with two sub directories,  C and Delphi Code and the model files needed to run your networks,Copy the C and H files to the SWMM5 Sub folder  D:\SWMMandSoftware\SWMM5.1.011\SWMM5_Code from the SWMM5 engine zip folderRename the vcxproj files so they correspond to the version of SWMM5,  SWMM55101_VC2012-DLL.vcxproj in the D:\SWMMandSoftware\SWMM5.1.011\SWMM5_Code\swmm51011_engine folderYou should be able to compile the Debug or Release versions, the SWMM5.DLL  file will be made in the debug or release D:\SWMMandSoftware\SWMM5.1.011\SWMM5_Code\swmm51011_engine\Release  You can change this location later for testing.

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PySWMM Documentation which is a Python package the allows seamless interaction with the USEPA-SWMM5

Source of this file is https://pypi.python.org/pypi/pyswmm/

Start here to begin working with pyswmm.

The pyswmm package allows seamless interaction with the USEPA-SWMM5
data model.  Parameter getters/setters and results getters have been
exposed, allowing the user to see results while a simulation is
running as well as update link settings.

Loading a Model
---------------

There are three options to load a model. If there is no desire to
interact with the simulation then the simplest way to run the
model is the following:

.. code-block:: python

>>> from pyswmm import Simulation
>>>
>>> sim = Simulation('./testmodel.inp')
>>> sim.execute()


The following method allows the user to read in a model and
manually step through the simulation and get/set parameters and
results.  This scenario is the cleanest solution using a
with statement. It automatically cleans up after the
simulation is complete. 

.. code-block:: python

>>> from pyswmm import…
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How to Set your Model Preferences in InfoSWMM_SA

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InfoSWMM SA Preferences

The Operation tab allows the user to control project settings relating to the management of various InfoSWMM SA operations. It should be noted that all the changes made on the Preferences dialog box must be saved prior to closing the dialog box. Many preferences set with this command will be reflected as the default choices on other dialog boxes.  You may change those settings as desired on those dialog boxes. Contents of the Operation Settings tab of the preferences dialog is described below: NAME DESCRIPTION Auto Length Calculation Auto Length/Area Calculation Auto Record Saving Auto Database Packing Delete Confirmation Auto Link Node Inclusion Check Update / Upgrade Batch Import on Open Batch Export on Save Allow Duplicated Report Store Absolute Conduit Invert Allow Project Database Editing Buffer Edit Diameter of (Filled) Circular Pipe in inch/mm in Attribute Browser Include Extra Summary Data for Map Display Use the Simul
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The beautiful code for the Water Quality Treatment Functions in #SWMM5

//----------------------------------------------------------------------------- //   treatmnt.c // //   Project:  EPA SWMM5 //   Version:  5.1 //   Date:     03/20/14   (Build 5.1.001) //             03/19/15   (Build 5.1.008) //   Author:   L. Rossman // //   Pollutant treatment functions. // //   Build 5.1.008: //   - A bug in evaluating recursive calls to treatment functions was fixed. // //----------------------------------------------------------------------------- #define _CRT_SECURE_NO_DEPRECATE
#include <stdlib.h> #include <string.h> #include "headers.h"
//----------------------------------------------------------------------------- //  Constants //----------------------------------------------------------------------------- static const int PVMAX = 5;            // number of process variables enum   ProcessVarType {pvHRT,          // hydraulic residence time                        pvDT,           // time step duration                        pvFLOW,         // flow rate         …
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