How to Use SWMM 5, SWMM 6, InfoSWMM for Water Quality, Hydrology, Hydraulics, RDII, LIDs, SuDs

SWMM5 Forums

Rain gauge Time-Series

Good day I am using daily rainfall data to model my catchment. For the time series, does rainfall have to be 7 digits. for instance, 0mm of rain inserted as 0000000 and 2,2mm as 000002,2. my supervisor has told me to use this way of inserting data. will it make any difference if i do not use this way of inserting my rainfall data. 

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1 Reply · Reply by Robert Dickinson May 21

LID Control Editor

Hi there,  Very new SWMM user here. Interested in defining some LID Controls so I can select them for my subcatchments in the drop down menu in the editor.    It seems I need to first define the Controls and how they are routed using the specialized property editor "LID Control Editor". Does anyone have recommendations for how to add this editor to my SWMM 5.1 interface?   Thanks!   -Ben

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2 Replies · Reply by Benjamin Fahy Feb 24

Control Rules

Rule 1IF SIMULATION TIME >= 0THEN ORIFICE UnderdrainPipe SETTING = 0PRIORITY 1 Rule 2IF NODE GravelSU DEPTH > 0.6THEN ORIFICE Backtosoil SETTING = 1ELSE ORIFICE Backtosoil SETTING = 0PRIORITY 2 My intentions are: Rule 1, The orifice "UnderdrainPipe" starts as closed and is always closed for the entire simulation, and Rule 2 If the depth in GravelSU storage unit node rises to 0.6ft or greater, another Orifice Backtosoil is supposed to open and convey water. SWMM is not responding to my…

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7 Replies · Reply by Bernard Bahaya Dec 2, 2017

Underground Storage Units

I am currently attempting to model in SWMM Stormtech chambers as a subsurface pond/storage unit connected to a surface pond with a higher stage. How do I cap off the underground system so water will not pond higher than the top of my chambers? When i run the model, it wants to flood and have the water go to a higher elevation. Since the system is capped, once the chambers fill up, water should backflow to the pond. Thanks

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1 Reply · Reply by Robert Dickinson Oct 25, 2017

SWMM Times-series input options

Very glad that i join the group. am new to SWMM5.1.12 Version.currently am doing modeling the stormwater for a small urban catchment.no difficulties while studying and applying the model but i only have daily recorded rainfall data-set which am confused either SWMM accepts only timeseries values at interval of 5,15,hourly?or is it recommended to use daily intervals for simulation? and what possible uncertainities could happen if its ok to use? please,appreciate any one helping me.tnx

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4 Replies · Reply by TEAMIR ABRAHA Jun 9, 2017

How are the St Venant Units used in #SWMM5?

 Overview In this blog we example the St Venant terms 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. How are the St Venant Terms used in SWMM5? Figure 1 shows the terms and Figure 2  and Figure 3 shows the terms in a SWMM5 table and SWMM5 graph.  dq2 = Time Step * Area…

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Storage Nodes in a Small Catchment Area

Hi everyone! I'm currently new to SWMM (real beginner) and I would just like to ask for some help from you. I'm trying to model LID facilities using SWMM. I wanted to compare our observed data from our manual monitoring and the simulation data from SWMM. I'm using storage nodes to represent LID facilities in my model. However, I can't seem to find how to delay the runoff or even lessen (store) the amount of runoff in the storage node. In other words, the flow in my junctions and outfalls are…

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SWMM5 Blogs

Calculate runoff depth of a subbasin

Hi all,

I am trying to calculate runoff depth for a subbasin from the subbasin peak flow ( collected from SWMM model)by inverting the manning's equation ( as SWMM uses manning's equation for the calculation of peak flow) . In that case,…

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Comments: 0

Modeling "Leaf" Gates

I am trying to determine the best way to represent "leaf" gates in SWMM5.  The gate consists of two panels that overlap each other.  The top gate serves as an overflow weir and drops as the upstream water level rises.  If the top gate is fully…

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Diversion Sturctures and SSO events in SWMM 5

I'm a new user to SWMM and i'm currently trying to model SSO events at a waste water treatment plant. I've been using dynamic routing and I've been having trouble modeling the diversion structure. Currently I have a storage node acting as a wet…

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Comments: 1

Running SWMM5 Using .bat files

Hi Robert,

I have a folder with many inp files representing different urbanization scenarios for a watershed in VA. I would like to automate the processing of this files because it is something I'll most probably will have to do…

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Comments: 1

Large data output extraction in SWMM

Hi,

I have developed a model with 33 subcatchments using 1 year hourly  rainfall data. The problem is when I try to get the runoff for all the subcatchments it says '' too many objects to display".

It would be really…

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Comments: 1

hi,

i have every 1h of total 12h rainfall time series data and run for 12h . so i got total precipitation in status report is 108 mm but when i sum up total time series is 112mm which is grater then report.

moreover when i…

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Comments: 1

thanks bob for your reply, can you tell me another issues like total precipitation in status report how it is calculated? i am using time series rainfall for 10 minute interval as intensity. total precipitation value and depth in status are not…

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Comments: 2

All Forums

Calibration of RTK parameters using SRTC tool from PCSWMM

Hi everyone, I am currently having problems with calibrating/finding my RTK parameters and derive a unit hydrograph for my wet period simulations, so any help is more than appreciated!!   I have set up my DWF and flow patterns, and I have calibrated my model using my field flow measurements and the SRTC tool implemented within PCSWMM. I have followed all the steps to derive an RTK unit hydrograph and I have implemented it in my simulations. I have also tried to calibrate the RTK parameters for short, medium and long-term responses. Everything works nicely in my calibration for DWF and all the steps work well for the RTK unit hydrograph creation, however, when I use the SRTC tool I see no response in my hydrographs (comparing my simulated and observed hydrographs), implying that my RTK parameters have no effect on my hydrograph response. How should I understand that my sensibility analysis results in no response from changing my RTK values? Please note that I am ignoring initial…

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2 Replies · Reply by Claudio Consuegra Martínez Sep 10

Rain gauge Time-Series

Good day I am using daily rainfall data to model my catchment. For the time series, does rainfall have to be 7 digits. for instance, 0mm of rain inserted as 0000000 and 2,2mm as 000002,2. my supervisor has told me to use this way of inserting data. will it make any difference if i do not use this way of inserting my rainfall data. 

Read more…
1 Reply · Reply by Robert Dickinson May 21

LID Help

Greetings fellow SWMMers, I am working on my masters project and I am struggling to get the output of my model to match with the precipitation data I have. My precipitation data indicates that I should have about 50 inches of cumulative rainfall for the year 2008.  However, the output of my model, using the assoicated precipitation values as input for my time series, indicates that there is only about 20 inches of precipitation. I have set the units as inches and cumulative precipitation, with my subcatchments imperviousness set to 100%, as well as specifying LID parameters (dedicated entire subcatchment area to area of LID; rain barrel height, outlet, etc.) Does anyone have any suggestions as how to go about fixing this issue?  Some context: My project invovles rainwater harvesting using the LID capabilities within SWMM. I have precipitation data from NOAA for several rain gauges in Nan, Thailand - a rural, mountainous province.  The precipitation data is 24 hour amounts, but I have…

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LID Placement and control session

hello all.i run a model containing 41 sub catchments and want to see the runoff Peaks from 24 years simulated rainfall data.finally i got two sub-catchs(S80 & S81) result around 4 cms and i had to do LID placement in both catchs and i do place 4 TO 5 type of LID(GR,BC,PP,IT and vegitation swale).but when i run the model again i see no change in runoff reduction of those two subcatchments.

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1 Reply · Reply by Robert Dickinson Mar 5

LID Placement and Performance

hello all.i run a model of 41 sub catchments and want to see the runoff Peaks from 24 years simulated rainfall data.finally i got two sub catchs(S80 & S81) result around  4cms.and i had to do LID placement in both catchs and i do place 4 raingarden, 4 bio-retention, infiltration trench and 6 Permeable pavemet in which all tend to cover the % of imperv. with in the subcatchments but finally when i run it again i found no change at all. what do you think is missed?? 

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1 Reply · Reply by Mauluddin Sebandar Apr 1

LID Control Editor

Hi there,  Very new SWMM user here. Interested in defining some LID Controls so I can select them for my subcatchments in the drop down menu in the editor.    It seems I need to first define the Controls and how they are routed using the specialized property editor "LID Control Editor". Does anyone have recommendations for how to add this editor to my SWMM 5.1 interface?   Thanks!   -Ben

Read more…
2 Replies · Reply by Benjamin Fahy Feb 24

Control Rules

Rule 1IF SIMULATION TIME >= 0THEN ORIFICE UnderdrainPipe SETTING = 0PRIORITY 1 Rule 2IF NODE GravelSU DEPTH > 0.6THEN ORIFICE Backtosoil SETTING = 1ELSE ORIFICE Backtosoil SETTING = 0PRIORITY 2 My intentions are: Rule 1, The orifice "UnderdrainPipe" starts as closed and is always closed for the entire simulation, and Rule 2 If the depth in GravelSU storage unit node rises to 0.6ft or greater, another Orifice Backtosoil is supposed to open and convey water. SWMM is not responding to my intentions. What is wrong with my code?

Read more…
7 Replies · Reply by Bernard Bahaya Dec 2, 2017

Underground Storage Units

I am currently attempting to model in SWMM Stormtech chambers as a subsurface pond/storage unit connected to a surface pond with a higher stage. How do I cap off the underground system so water will not pond higher than the top of my chambers? When i run the model, it wants to flood and have the water go to a higher elevation. Since the system is capped, once the chambers fill up, water should backflow to the pond. Thanks

Read more…
1 Reply · Reply by Robert Dickinson Oct 25, 2017

Daily recorded rainfall data input format

Hello all,sir!.i have been tried so hard with the data input of a historical rainfall data INTO times series USER DEFINED GRID of EPA SWMM5.1, but i keep getting the ERROR telling me "time out of order" in which I have a daily rainfall data recorded at 9:00:00 every day for 25 years(only available data) in excel. how can i make it work sir?? in case my data is attached below,thanx a %28FORMAT%29%20SWMM%20INPUT%20Time%20series%20of%20all%20station%20in%20mekelle.xlsx lot.

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7 Replies · Reply by Robert Dickinson Dec 20, 2017

MatLab and SWMM5

Linking or Coupling SWMM with Genetic Algorithm

Hello, I'm working on the coupling of  SWMM with Genetic Algorithm by use Matlab language. I want to call SWMM in Matlab "Genetic Algorithm" Explain my idea: 1. build system model in SWMM. 2. Open "program Genetic Algorithm"  programming by Matlab language. 3. Call SWMM in "program Genetic Algorithm". 4. Do run for the model in SWMM. 5. Change value of pipe diameter  6. Replay run the model in SWMM with different value of Diameter. 7. Find Optimal diameter of sewer by Genetic Algorithm. Best…

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1 Reply · Reply by I Putu Gustave Suryantara Pariar May 9, 2016

Export time series of all nodes in one text file for SWMM

Hi, I am trying to make a link between SWMM and MATLAB (couple operation) to derive optimal policies. So, I call SWMM in MATLAB in each function evaluation process and need its results for decision making of optimization algorithm. The problem is that I need to export data of some control nodes in one "text file" (for example time series of depth in one internal node) to have access to that data and be able to evaluate the objective function and change the policy until convergence. As I see,…

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7 Replies · Reply by Hussain SHAHZAD May 30

Safe way to change simulation data during runtime

Hello, I'm working on the coupling of  SWMM with a homemade 2D superficial flow model. The later is written in Python. For this purpose, I'm currently writing a Python wrapper for SWMM using ctypes. So far I managed to control a simulation from Python using swmm_step() and get results at each time-step using node_getResults().  But for my purpose I will need to exchange nodes data at runtime. Simply put, at each time-step I need to read values from given nodes, and then update them before the…

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2 Replies · Reply by Rudy VanDrie Feb 15, 2017

the successful way to combine MATLAB with SWMM

Hi everyone,  I found there were many questions about how to call SWMM in matlab, and this problem has bothered me for a long time.  Now I find a way to combine MATLAB with SWMM, it solve my problem, and I want to share with your guys .  The principle is to read and change .inp file of SWMM, and call swmm in MATLAB, then read the .rpt file to import data to matlab workspace.  The step and the main command are like below: 1. use  the command 'textscan' in matlab to read .inp file, the result…

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1 Reply · Reply by Gerardo Andres Riaño Briceño Oct 23, 2015

open .out file

Hello everyone, I would like to read the .out file in a text editor created after a simulation in SWMM5. However I can't get anything readable when I open the file in notepad or some equivalent software. As I would like to combine SWMM and Matlab, I need to see and understand the structure of the .out file... Anyone knows how to do that? Thanks, Nicolas

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4 Replies · Reply by deville May 27, 2014

Sample code and example for link SWMM to Matlab

Hello folks, I was happy for the fact that I found this website but my excitement didnt last long! I read all of the dicussions here but I couldnt find a post which directly show me how to connect Matlab to SWMM. Yes, you do parallel processing and all of the fancy stuff with SWMM but I still don't know how call the SWMM! I may have missed something. I'm looking for a sample code to call SWMM from Matlab and do some changes to calibrate and essentially optimize the specific parameters. I think…

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3 Replies · Reply by Gerardo Andres Riaño Briceño Oct 23, 2015

Re: parallel swmm and matlab

Hi Ive been running an optimization of swmm using matlab. I was hoping to use the multistart and ga algorithms in parallel mode so I could make use of a multicore PC. I havent been able to get this running  (serial optimization is ok), since parallel calls are being made to SWMM and something is being overwritten.. What Ive tried is: - rename SWMM5.exe in matlab folder to SWMM5_1,2,3 corresponding to the core no. - assign the current .inp file to the current core number - cycle through the…

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5 Replies · Reply by Gerardo Andres Riaño Briceño Oct 23, 2015

editing subcatchment, node and conduit parameters using swmm5 interface commands

Hi there, I am going to edit some parameters in swmm5 input file through swmm5 interface commands. Is it possible to do that or not? I can find some commands to read results for example GetSingleResult to view simulation results for particular parameters but I can not find any commands to change some particular parameters as an new input file. I think this can be done for Epanet2 through epanet toolkit.  Please tell me if it is possible to change input file parameters (for example…

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2 Replies · Reply by yasert Mar 5, 2013

Welcome

Welcome, my name is Robert E Dickinson (RED) 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 InfoWorks ICM and ICM SE. The acronym RED is me.

You can now sign in with Twitter, Facebook, Linkedin and Google as well as an email address.  I have taken away any profile questions as well.  The years allowed for sign in now are 2114, 2115, 2116, 2117, 2118

Stormwater Management Model (SWMM) Information for watershed water quality, hydrology and hydraulics modelers (not associated with the EPA)

I am a Co-Developer of SWMM3, SWMM4, SWMM5, SWMM6 (Adviser), XPSWMM & Innovyze InfoSWMM, InfoSewer, LID, RDII, GA Product Manager/Specialist All of these together since  since August '72 @Innovyze since 2007.11 or 1992.11 depending on how you want to define periods of time.

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Important News about the current SWMM 5.1.013

Activity

Omar is now a member of SWMM 5 or SWMM or EPASWMM - (not formally associated with EPA)
15 hours ago
Claudio Consuegra Martínez replied to Claudio Consuegra Martínez's discussion Calibration of RTK parameters using SRTC tool from PCSWMM
"Hi all,
Thank you very much for the reply Robert. Indeed my raingage and simulation dates share the same time period. 
I would like to update you all on the subject as I found my problem (part of being novel to SWMM). I missed entering my tributary…"
Sep 10
Robert Dickinson replied to Claudio Consuegra Martínez's discussion Calibration of RTK parameters using SRTC tool from PCSWMM
"A simple question, is the raingage you are using for your RDII the same period as your simulaiton time?"
Sep 10
Claudio Consuegra Martínez posted a discussion
Hi everyone,I am currently having problems with calibrating/finding my RTK parameters and derive a unit hydrograph for my wet period simulations, so any help is more than appreciated!!  I have set up my DWF and flow patterns, and I have calibrated m…
Sep 9
Claudio Consuegra Martínez is now a member of SWMM 5 or SWMM or EPASWMM - (not formally associated with EPA)
Sep 9
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"Hello Haman,  Thank you for joining!"
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