Sunday, December 4, 2016

Beautiful-equations-how-insects-walk-on-water-and-galaxies-form Navier-Stokes


Monday, November 21, 2016

SWMM and SWMM 5 History from Past Wikipedia SWMM5 pages

SWMM and SWMM 5 History from Past Wikipedia SWMM5 pages – added by me as someone keeps editing the Wikipedia page and getting rid of this table.  Figure 1 is the past Wikipedia page and Figure 2 is the connection between SWMM5 and Innovyze’s InfoSWMM.  Current information can be found here https://www.wikiwand.com/en/Storm_Water_Management_Model

Figure 1 - Past Wikipedia Table for SWMM and SWMM5.

Figure 2 - SWMM5 and InfoSWMM Versions





Sunday, October 23, 2016

How to Use Scatter Plots in the DB Output tables of #InfoSWMM for d/D and q/Q

How to Use Scatter Plots in the DB Output tables of #InfoSWMM

All of the SWMM5 output tables are available in the output report manager of InfoSWMM and H2OMap SWMM.  A key output table is the conduit summary table where the maximum link values are shown.  You can use the right mouse click to see the statistics, plot, frequency plot, histogram graph and scatter graph for the selected column.  If you select two columns you can make a scatter plot. 

An interesting scatter graph is the d/D or capacity of the pipe versus q/Qfull for the pipe.  Qfull is based on the full pipe depth, area and hydraulic radius using the bed slope.  Due to the fact that InfoSWMM, SWMM5 and H2OMap SWMM use the full St. Venant solution you can have a q/Qfull greater than 1 when the d/D is less than 1.  Here are some St. Venant solution in SWMM5 blogs for reference.





Figure 1 - How to Use Scatter Plots in the DB Output tables of #InfoSWMM for d/D and q/Q

Update for [USEPA/SWMM-EPANET_User_Interface] MTP 3

Just a note about the great work being done on the new EPANET and SWMM 5 QGIS interface.
This is the third Minimum Testable Product, released for testing of specific functionality.
This is not a fully functional product and is not suitable for production use.

You are receiving this because you are subscribed to this thread.
View it on GitHub 

Friday, October 21, 2016

InfoSWMM, InfoSewer and InfoWater from Innovyze connection between your model data and your GIS data


One of the great features about InfoSWMM, InfoSewer and InfoWater from Innovyze is the intimate connection between your model data and your GIS data. It is important for this to work correctly that you use the correct spatial reference. Innovyze has many tools for changing the spatial reference:

1. Arc GIS TOC

2. Arc Toolbox projection tools

3. Innovyze tools for changing the spatial reference

4. Innovyze tools for margining spatial reference

5. GIS background maps from ESRI

6. Google Earth and Google Maps connections


A great twitter header image from our @Innovyze Channel Partners in Spain @sp_infoworks


Thursday, October 20, 2016

RDII Analyst, SWMM5 and ICM SE - Diagram of R, T and K parameters for RDII

RDII Analyst, SWMM5 and ICM SE - Diagram of R, T and K parameters for RDII.  RDII Analyst in H2OMap SWMM and #InfoSWMM can export using the SWMM5 Export Exchange tool SWMM5 files with calibrated RTK parameters for #SWMM5 and #InfoWorks_ICM




How to Use Arc Map Selection to add to Domains in #InfoSewer and #InfoSWMM

How to Use Arc Map Selection to add to Domains in #InfoSewer and #InfoSWMM:
  1. Use the Arc Map Selection Tools
  2. Select a layer of Nodes or Links in Arc Map
  3. Add your elements to the Arc Map Selection and finally
  4. Add the selected elements from Arc Map to the InfoSewer Domain (Bullet 4)

How to Use Arc Map Selection to add to Domains in #InfoSewer and #InfoSWMM


Sunday, October 16, 2016

More St Venant Equations in #SWMM5

This blog shows the relationship between the terms dq1, dq2, dq3 and dq4 in the SWMM5 code and the St. Venant Partial Differential Equations.

dq2 = Time Step * Area wtd * (Head Downstream – Head Upstream) / Link Length or

dq2 = Time Step * Area wtd * (HGL) / Link Length Qnew = (Qold – dq2 + dq3 + dq4) / ( 1 + dq1) when the force main is full dq3 and dq4 are zero and

Qnew = (Qold – dq2) / ( 1 + dq1) The dq4 term in dynamic.c uses the area upstream (a1) and area downstream (a2), the midpoint velocity, the sigma factor (a function of the link Froude number), the link length and the time step or

dq4 = Time Step * Velocity * Velocity * (a2 – a1) / Link Length * Sigma the dq3 term in dynamic.c uses the current midpoint area (a function of the midpoint depth), the sigma factor and the midpoint velocity

dq3 = 2 * Velocity * ( Amid(current iteration) – Amid (last time step) * Sigma

dq1 = Time Step * RoughFactor / Rwtd^1.333 * |Velocity| The weighted area (Awtd) is used in the dq2 term of the St. Venant equation:

dq2 = Time Step * Awtd * (Head Downstream – Head Upstream) / Link Length


Saturday, October 15, 2016

Hydraulic Jump and Froude # in #SWMM5


In this blog we example the Froude Number values computed in SWMM5 as equations, table, graphs and units. We use a QA/QC version of SWMM 5 that lists many more link, node, system and Subcatchment variables than the default SWMM 5 GUI and engine. This blog also applies to #InfoSWMM and any software the uses the #SWMM5 engine.  SWMM 5 computes only one flow in the middle of the link but it uses depth, head, cross sectional area and hydraulic radius at the upstream, midpoint and downstream points of the link (Figure 1).  The Froude # is computed at all three points and if you could see the Froude # you will see a jump at times in a single link (Figure 2).

Figure 1.  Computational points in #SWMM5
Figure 2.  Three locations of the Froude Number - it is possible to see where the Hydraulic Jump occurs in the link.

Other Links

If you just want to read you do not need to sign in but if you want to add a discussion or blog then you need to sign in as a Ning user. If you do not want to do either then you can send me an email to robert.dickinson@gmail.com or robert.dickinson@innovyze.com and I will do my best to answer your questions. Thanks for visiting and I hope you found something useful! Read here for reasons you should make a profile.

We also have a blogspot blog for SWMM5, InfoSWMM and InfoSewer which has a local and Google Search option so it is easier to find tagged information on SWMM5.NET and the Wordpress Site SWMM5.ORG You can also see my recent posts on Twitter and the Official Innovyze Blog which also has great information on ICM and IWCS.