SWMM5 - Stormwater Management Model

SWMM 5, Watersheds, Water Quality,Hydrology, Hydraulics - Watersheds

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Robert E Dickinson Steady State Option in SWMM 5

The skip steady state periods uses the last computed flows in the conveyance system instead of computing new flows. In the sample graphs you can see where the change in lateral flow is below 0.05 cfs (the blue arrow in the second image). The network solution used the steady flows about 27 percent of the time. The time step summary in the text output file tells you how often the model was in steady state.

Skip Steady State Periods
Checking this option
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Added by Robert E Dickinson on March 19, 2010 at 10:00pm — No Comments

Robert E Dickinson MWH Soft FloodWorks Successfully Predicts Flash Flooding in Egypt

MWH Soft FloodWorks Successfully Predicts Flash Flooding in Egypt

Advanced Flood Forecasting Software Helps Save Lives and Minimize Damages


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Added by Robert E Dickinson on March 17, 2010 at 12:33pm — No Comments

Robert E Dickinson A new test of the Light:Nutrient hypothesis

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Added by Robert E Dickinson on March 16, 2010 at 2:03pm — No Comments

Robert E Dickinson Saving U.S. Water and Sewer Systems Would Be Costly

Saving U.S. Water and Sewer S

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Added by Robert E Dickinson on March 15, 2010 at 9:54am — No Comments

Robert E Dickinson Lead and Lag Pump Options in SWMM 5

Introduction: If you have a lead and lag pump connecting the same upstream and downstream nodes the normal behavior for the two pumps is to have the the lead pump turn on first followed by the lag pump. The turn on and turn off depths for the pumps determine whe
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Added by Robert E Dickinson on March 13, 2010 at 7:00pm — No Comments

Robert E Dickinson Tropics: Global Warming Likely to Significantly Affect Rainfall Patterns

Tropics: Global Warming Likely to

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Added by Robert E Dickinson on March 3, 2010 at 5:30pm — No Comments

Robert E Dickinson MWH Soft Announces InfoSWMM 2D: Next Generation of Two-Dimensional Hydrodynamic Stormwater and Overland Flow Modeling

MWH Soft Announces InfoSWMM 2D: Next
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Added by Robert E Dickinson on March 3, 2010 at 11:38am — No Comments

Robert E Dickinson SWMM 5 Iterations

These three graphs show how the number of iterations to solve the St. Venant equation in SWMM 5 changes during the course of the simulation based on rapidly changing inflow, steady inflow and decreasing inflow. This example allows up to ten iterations and a tighter head tolerance to better illustrate how the number of iterations increase atContinue

Added by Robert E Dickinson on February 27, 2010 at 9:00pm — No Comments

Robert E Dickinson SWMM5 Bubble Plot of Continuity Error

The overall continuity error at any time during the simulation is simply the total inflow minus the total outflow. The total inflow is the dry weather, wet weather, groundwater, I&I inflow, external inflow and the initial network storage. The total outflow is the amount of surface flooding, outfall flow, reacted flow and the final storage.

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Added by Robert E Dickinson on February 27, 2010 at 3:00pm — No Comments

Robert E Dickinson Stimulus-funded weirs completed in Lehigh Acres

Stimulus-funded weirs completed in Lehigh Acres
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Added by Robert E Dickinson on February 26, 2010 at 10:54pm — No Comments

Robert E Dickinson MWH Soft Unveils Highly Anticipated InfoWorks ICM for Integrated Modeling of Above- and Below-Ground Drainage Systems

MWH Soft Unveils Highly Anticipated InfoWorks ICM for Integrated Modeling of
Above- and Below-Ground Drainage Systems

Groundbreaking Advancement in Hydraulic Modeling Software Promise

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Added by Robert E Dickinson on February 24, 2010 at 12:00pm — No Comments

Robert E Dickinson Warmer Planet Temperatures Could Cause Longer-Lasting Weather Patterns

Warmer Planet Temperatures Could Cause Longer-Lasting Weather Patterns

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Added by Robert E Dickinson on February 21, 2010 at 9:00am — No Comments

Robert E Dickinson MWH Soft President Dr. Paul F. Boulos Inducted Into University of Kentucky College of Engineering Hall of Distinction

MWH Soft President Dr. Paul F. Boulos Inducted Into
University of Kentucky College of Engineering Hall of Distinction


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Added by Robert E Dickinson on February 17, 2010 at 12:09pm — No Comments

Robert E Dickinson SWMM 5 Conduit Lengthening

If you use the conduit lengthening option under the dynamic tab the shorter lengths will be lengthened internally during the simulation and the results will be a smoother.

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Added by Robert E Dickinson on February 16, 2010 at 7:30pm — No Comments

Robert E Dickinson The Story of P(ee)

The important element Phosphorus which we overuse and waste in our treatment processes.

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Added by Robert E Dickinson on February 12, 2010 at 8:30am — No Comments

Robert E Dickinson 2009 temperatures by Jim Hansen

2009 temperatures by Jim Hansen

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Added by Robert E Dickinson on February 11, 2010 at 11:20pm — No Comments

Robert E Dickinson Climate Change and Snow

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Added by Robert E Dickinson on February 11, 2010 at 4:12pm — No Comments

Robert E Dickinson Global Temperature Trend Update - February, 2010

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Added by Robert E Dickinson on February 10, 2010 at 7:00pm — No Comments

Robert E Dickinson What The Snowpocalypse Tells Us About Global Warming

What The Snowpocalypse Tells Us About Global War

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Added by Robert E Dickinson on February 10, 2010 at 2:30pm — No Comments

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Cygne is now a member of SWMM5 - Stormwater Management Model
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Hi, Thanks a lot and I will be working on it. Thanks again for your effort. Upaka
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Yes, you can add a Dry weather flow concentration to a node in SWMM 5. 1st you make a pollutant, then go to a node and add DWF and a pollutant concentration. The load - flow * concentration will go into the network.
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Hi,Is it possible to add a pollutant concentration (eg. TSS = 20 mg/L) to a node at a network in SWMM? Thanks a lot
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Saving U.S. Water and Sewer Systems Would Be Costly By CHARLES DUHIGG WASHINGTON — One recent morning, George S. Hawkins, a long-haired environmentalist who now leads one of the largest and most prominent water and sewer systems, trudged to a street…
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If you a lead and lag pump connecting the same upstream and downstream
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