Figure 1 - Past Wikipedia Table for SWMM and SWMM5. |
Figure 2 - SWMM5 and InfoSWMM Versions |
Autodesk Technologist with Information about Stormwater Management Model (SWMM) for watershed water quality, hydrology and hydraulics modelers (Note this blog is not associated with the EPA). You will find Blog Posts on the Subjects of SWMM5, ICM SWMM, ICM InfoWorks, InfoSWMM and InfoSewer.
Figure 1 - Past Wikipedia Table for SWMM and SWMM5. |
Figure 2 - SWMM5 and InfoSWMM Versions |
Harness the power of visualization with scatter plots in the DB Output tables of #InfoSWMM—a dynamic feature that brings the extensive data from SWMM5 output tables to life. 🌟📊
In InfoSWMM, you're not just reading numbers; you're witnessing the maximum link values dance across the Conduit Summary Table. With a simple right-click, a world of statistical analysis unfolds before you, offering plots, frequency graphs, histograms, and the coveted scatter graphs for any selected column. 🖱️💡
Dive Into the Data: Engage in a visual dialogue with your model by selecting two columns and crafting a scatter plot that tells a story. A plot of particular interest? The relationship between d/D, the depth-to-diameter ratio (capacity) of the pipe, and q/Qfull, the flow rate to full capacity flow rate. 📈🔍
Why Does It Matter? Qfull is calculated based on the full pipe depth, area, and hydraulic radius, all derived from the bed slope. Given that InfoSWMM, SWMM5 employ the robust St. Venant equations, you might observe q/Qfull ratios exceeding 1, even when d/D is below 1—a testament to the detailed physics captured by the models. 🌊🔢
Reference Material: For those thirsty for more knowledge, a treasure trove of St. Venant solutions within SWMM5 awaits in our comprehensive blogs. Each post serves as a beacon, guiding you through the intricacies of hydraulic modeling. 📚✨
Embrace these tools to transform data points into a narrative, charting the course of your wastewater management journey with precision and clarity. 🛠️🌐🚀
Figure 1 - How to Use Scatter Plots in the DB Output tables of #InfoSWMM for d/D and q/Q |
A great twitter header image from our @Innovyze Channel Partners in Spain @sp_infoworks #rt pic.twitter.com/NjVKfhr0Ir— Robert Dickinson (@InnovyzeRobert) October 21, 2016
How to Use Arc Map Selection to add to Domains in #InfoSewer and #InfoSWMM |
In this blog we show how the St Venant terms are used 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 also applies to #InfoSWMM and any software the uses the #SWMM5 engine.
SWMM5 is using is the most advanced equations as it takes into consideration the full dynamic (St. Venant) equations and not the more simplified kinematic wave / manning equations. The manning equation only considers the uniform flow conditions which represents a situation where the gravitational force on a column of water (due to the channel slope) balances out the frictional force. The full dynamic equations contains additional factors that affect the movement of water in a conduit or channel. These include the pressure force due to variation of depth along the length of the channel and the inertial (or convective acceleration) effect due to variation of flow area along the channel length. Because of these additional terms the flow/head relation you have in uniform flow conditions can be completely different according to the configuration of his network.
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. |
In this blog we show how the St Venant terms are used 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 also applies to #InfoSWMM and any software the uses the #SWMM5 engine.
SWMM5 is using is the most advanced equations as it takes into consideration the full dynamic (St. Venant) equations and not the more simplified kinematic wave / manning equations. The manning equation only considers the uniform flow conditions which represents a situation where the gravitational force on a column of water (due to the channel slope) balances out the frictional force. The full dynamic equations contains additional factors that affect the movement of water in a conduit or channel. These include the pressure force due to variation of depth along the length of the channel and the inertial (or convective acceleration) effect due to variation of flow area along the channel length. Because of these additional terms the flow/head relation you have in uniform flow conditions can be completely different according to the configuration of his network.
Figure 1. St Venant Terms in Table and Graphs for #SWMM5 for dq1, dq2, dq3, dq4, dq5, dq6 |
Figure 2. St Venant Equation in SWMM5 |
Figure 1. The - node degrees for a sample network. |
The d/D is higher in link CDT-2253 due the effect of a fuller pipe downstream (1). The d/D is the value in the middle of the link and it averages the downstream and upstream d/D. The flow in CDT-2249 is 160 and the d/D is 0.47 but even though the flow in CDT-2253 is the same, the d/D is higher as the pipe downstream Pipe-4520 is fuller due to a flow of 425. The higher d/D in Pipe-4520 means that the downstream d/D of CDT-2253 is higher as
The d/D is the middle value and is the average of the depths at the upstream and downstream points of the link.
CDT-2249 has a d/D of 0.47 as it does not have a downstream effect.
HGL Graph in #InfoSWMM |
Ycrown
|
exp(-15.0 * f) Taper Value
|
f = (yLast - yCrown) / yCrown or yLast/yCrown - 1
|
exp(-15.0 * f) Taper Value
| |||||||||||
1
|
1.0000
|
0
|
1.0000
| |||||||||||
1.01
|
0.8607
|
0.01
|
0.8607
| |||||||||||
1.02
|
0.7408
|
0.02
|
0.7408
| |||||||||||
1.03
|
0.6376
|
0.03
|
0.6376
| |||||||||||
1.04
|
0.5488
|
0.04
|
0.5488
| |||||||||||
1.05
|
0.4724
|
0.05
|
0.4724
| |||||||||||
1.06
|
0.4066
|
0.06
|
0.4066
| |||||||||||
1.07
|
0.3499
|
0.07
|
0.3499
| |||||||||||
1.08
|
0.3012
|
0.08
|
0.3012
| |||||||||||
1.09
|
0.2592
|
0.09
|
0.2592
| |||||||||||
1.1
|
0.2231
|
0.1
|
0.2231
| |||||||||||
1.11
|
0.1920
|
0.11
|
0.1920
| |||||||||||
1.12
|
0.1653
|
0.12
|
0.1653
| |||||||||||
1.13
|
0.1423
|
0.13
|
0.1423
| |||||||||||
1.14
|
0.1225
|
0.14
|
0.1225
| |||||||||||
1.15
|
0.1054
|
0.15
|
0.1054
| |||||||||||
1.16
|
0.0907
|
0.16
|
0.0907
| |||||||||||
1.17
|
0.0781
|
0.17
|
0.0781
| |||||||||||
1.18
|
0.0672
|
0.18
|
0.0672
| |||||||||||
1.19
|
0.0578
|
0.19
|
0.0578
| |||||||||||
1.2
|
0.0498
|
0.2
|
0.0498
| |||||||||||
1.21
|
0.0429
|
0.21
|
0.0429
| |||||||||||
1.22
|
0.0369
|
0.22
|
0.0369
| |||||||||||
1.24
|
0.0273
|
0.24
|
0.0273
| |||||||||||
1.25
|
0.0235
|
0.25
|
0.0235
|
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