Advanced Graphs in InfoSWMM v14 and H2OMap SWMM v14

There was a change in EPA SWMM 5.1 to better represent Weekend vs Weekday Hourly flow patterns

There was a change in EPA SWMM 5.1 to better represent Weekend vs Weekday Hourly flow patterns

Fields for the DWF Tables in H2OMap SWMM and InfoSWMM are:

1. Scenario Name

2. Junction ID for the node that receives the DWF

3. The item – either FLOW, MASS or Concentration (Use Blockedit to just set this at Flow for all Rows) and you should fix your problem.

4. Value – the flow in the units defined in the Run Manager

5. Pattern1 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns.  They can be in any order but Hourly only applies Monday to Friday.

6. Pattern2 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Hourly only applies Monday to Friday.

7. Pattern3 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Hourly only applies Monday to Friday.

8. Pattern4 – Can be Weekend, Hourly (Weekday only), Monthly or Daily patterns. They can be in any order but Weekend only applies to Saturday and Sunday.

9. Alloc Code which is a tag from the DWF Allocator

It used to be that the two hourly patterns were applies as

… the week end flows are generated in the model by multiplying Node DWF x Hourly x Weekend x Daily x Monthly. 

But now

… the week end flows (Saturday and Sunday) are generated in the model by multiplying Node DWF x Weekend x Daily x Monthly. 

… the daily flows (Monday to Friday) flows are generated in the model by multiplying Node DWF x Hourly x Daily x Monthly.  

How to Tell how Long Normal Flow is used in a Link in #InfoSWMM, H2OMap SWMM w/ #SWMM5

How to Tell how Long Normal Flow is used in a Link in #InfoSWMM, H2OMap SWMM  w/ #SWMM5

Find the Fraction of Normal Flow Limited in the Flow Classification  Table and copy it to the Link Information Table - the value of FLM can then be Displayed in a Map using  the Map Display command.  In this small example, three links primarily used normal flow and one uses it for a short time. Normal flow only uses the Manning's equation and the link upstream depth, hydraulic radius and cross sectional area to compute the flow.

How to Tell how Long Normal Flow is used in a Link in #InfoSWMM, H2OMap SWMM  w/ #SWMM5

St. Venant equation solution – this is the link attribute data used when the St. Venant Equation is used in #SWMM 5. Simulated Parameters from the upstream, midpoint and downstream sections of the link are used.

Normal Flow Equation – this is the link attribute data used when the Normal Flow Equation is used in #SWMM 5. Only simulated parameters from the upstream end of the link are used if the normal flow equation is used for the time step.

#SWMM5 on #GITHUB and 21.CO Machine Learning

1.  Robert E Dickinson Retweeted

   Varun Jain ‏@varun_jain  6h6 hours ago

   From WWW to Social Web to Machine Learning Web. This could be huge! https://21.co/learn/crawl-the-machine-payable-web/#step-1-create-the-402-crawler-script …

   4 retweets3 likes

    

    

    
2. Robert E Dickinson ‏@RDickinson  33m33 minutes agoFlorida, USA

   2nd/ #SWMM5 on #github https://github.com/asselapathirana/swmm5-ea/ …

   View summary

   0 retweets0 likes

    

    

    

    
3. Robert E Dickinson ‏@RDickinson  34m34 minutes agoUtah, USA

   #SWMM5 on #github https://github.com/lothar-mar/swmm5 …

   View summary

   0 retweets0 likes

    

    

    

    
4.  Robert E Dickinson Retweeted

   James Williams ‏@jamwil  14h14 hours agoCalgary, Alberta

   Coolest part about @21—they know so well that http://21.co/learn  is even more important than http://21.co/buy 

   9 retweets13 likes

    

    

    

Innovyze St Venant Solutions for InfoSewer, H20Map Sewer, #InfoSWMM, H2OMap SWMM and #InfoWorks_ICM and #InfoWorks_ICM_SE

This blog contrasts the St Venant Solutions for InfoSewerH20Map Sewer (1), InfoSWMM/H2OMap SWMM and ICM/ICM SE.

1.  Assumptions for the St. Venant Equations

The assumptions behind Lumped and Distributed Models along with the assumptions of the St Venant equations.  InfoSewerH20Map Sewer, InfoSWMM, H2OMap SWMM, SWMM5, ICM and ICM SE are all Distributed models for Unsteady flow.  InfoSWMM and InfoSewerH20Map Sewer have options for direct steady flow.  ICM and InfoSWMM can also use a quasi steady flow solution.   All of these Innovyze models use the Continuity Equation and Momentum equation for routing flows in links.  The numerical solution differs between the three Innovyze main  platforms:

• InfoSewer and H2OMap Sewer
• InfoSWMM,  H2OMap SWMM and SWMM 5
• ICM and ICM SE

Continuity Equation

Various Forms of the Momentum Equation

2.  Muskingum-Cunge for InfoSewerH20Map Sewer

The continuity (mass conservation) equation is:

where

x          =          distance along the pipe (longitudinal direction of sewer)

A          =          flow cross sectional area normal to x

y          =          coordinate direction normal to x on a vertical plane

d          =          depth of flow of the cross section, measured along y direction

Q         =          discharge through A

V          =          cross sectional average velocity along x direction

S0         =          pipe slope, equal to sin θ

θ          =          angle between sewer bottom and horizontal plane

Sf            =          friction slope

g             =          gravitational acceleration

t           =          time

β          =          Boussinesq momentum flux correction coefficient for velocity distribution

3. SWMM5, H2OMap SWMM and InfoSWMM

 

4. ICM and ICM SE

5. A common look at the Equations for ICM, ICM  SE. InfoSWMM and H2OMap SWMM

ICM 2D and InfoSWMM 2D Equations

ICM 2D and InfoSWMM share the same computational engine as described on the Innovyze Blog

As the scheme is an explicit solution it does not require iteration to achieve stability within defined tolerances like the ICM 1D scheme or the iterative solution in InfoSWMM.  Instead, for each element, the required timestep is calculated using the Courant-Friedrichs-Lewy condition in order to achieve stability, where the Courant-Friedrichs-Lewy condition is