Month: July 2013

Drainage Wells or a Vertical Exfiltration Trench in InfoSWMM

Subject:  Drainage Wells or a Vertical Exfiltration Trench in InfoSWMM   Note, this is just one way to model an Exfiltration Trench.  The source for the image below is Rice Creek Watershed.    You can make a storage node to simulate the trench with […]

How to make Multiple Storm Events in InfoSWMM and How to Use them in the Scenario Manager

Subject:  How to make Multiple Storm Events in InfoSWMM and How to Use them in the Scenario Manager   Step 1.  Make a new Time Series to hold the data points for your new Rainfall Time Series in the Operation Tab of the […]

Weirs in InfoSWMM and SWMM5

Weirs in InfoSWMM and SWMM5 Subject: Weirs in InfoSWMM  Figure 1 shows the relationship between the weir input data and the upstream and  downstream nodes. ·         Height, ·         Crest and ·         Node Invert Elevation  There are four […]

How to Set Up an InfoSWMM 2D Simulation Polygon and Mesh

Subject: How to Set Up an InfoSWMM 2D Simulation Polygon and Mesh    Step 1: Create the 2D Database      Step 2: Verify the Creation of the 2D Database      Step 3: Create the background Simulation Polygon for the 2D simulation     Step 4: Create the Mesh on the 2D Simulation Polygon     Step 5: Run the […]

InfoSWMM and H2oMAP SWMM Map Display of d/D

Note:  You can use the Output Statistics Manager in InfoSWMM and H2OMAP SWMM to compute the peak d/D for ALL of the links in your network. Once you have calculated the peak d/D using the tool you can copy them using the command Ctrl-C and […]

Pump / Force Main System in InfoSWMM and SWMM 5

Subject:  Pump / Force Main  System in InfoSWMM and SWMM 5   The basic system consists of:            Wet Well and its associated physical parameters,          Pump Type          Defined Pump Curve,          Downstream […]

Manhole Elevations in InfoSWMM and SWMM 5

Subject: Manhole Elevations in InfoSWMM and SWMM 5   Starting from the bottom of the manhole you have these regions of computational interest:   1.   Manhole Invert to the lowest link invert – the node continuity equation is used with the area of […]

This is how you use the batch file in SWMM 5 to make a Report

This is how you use the batch file in SWMM 5 to make a Report  Step 1:  You make a bat file – here is a sample file that uses the swmm5.exe program  swmm5.exe Example1.inp  D:\swmm5.0.021\bob.rpt pause     Step 2:  Set up the Report Data in the input file   [REPORT] CONTROLS NO NODES   ALL […]

How to Save Selected Nodes and Links in InfoSWMM

Note:   How to Save Selected Nodes and Links in InfoSWMM   Step 1:  Decide what Nodes and Links you want to save.       Step 2:  You can read the flow, velocity, depth and capacity from the RPT Text File.     via Blogger […]

How to change the Maximum Infiltration in a DB Table of InfoSWMM and H2OMAP SWMM

Note:  How to change the Maximum Infiltration in a DB Table of InfoSWMM and H2OMAP SWMM   There are a lot of methods in InfoSWMM and H20MAP SWMM to change the infiltration data.  You have the ability to change it for   1.      an individual subcatchment using the Attribute Browser 2.      by soil type and 3.      the […]

How to change the background color and data view in InfoSewer and InfoSWMM

Subject:  How to change the background color and data view in InfoSewer and InfoSWMM   Tip 1:  Use the command View> Data Frame Properties > Frame > Background (change color) to change the background color     Tip 2:  Use the command View> Data Frame Properties > Data Frame > Extent to change the default view in Arc GIS.  You would use […]

Steps to take and rules for Cloning Datasets in InfoSWMM and InfoSewer

Note: Steps to take and rules for Cloning Datasets in InfoSWMM and InfoSewer   Before cloning an active dataset, the user should switch to the Base Scenario.  This saves the active datasets and allows the user to clone the dataset with all edits.      This is a […]

How to Make an Internal Outfall into an External Outfall when you have more than one link connected to an Outfall in SWMM5

Subject:  How to Make an Internal Outfall into an External Outfall when you have more than one link connected to an Outfall Step 1:  Identify the Problem “ERROR 141: Outfall J-561 has more than 1 inlet link or an outlet link.” Means […]

The Time Base is T + T*K from the Time(T) and Storage (K) values for RDII in SWMM5

Note:  Each of the RDII UH’s has a base time for the convolution of the RDII from each UH.  The Time Base is T + T*K from the Time(T) and Storage (K) values  used in the RTK data.  In […]

Four cross sectional areas are used in a link of SWMM 5

Note: Four cross sectional areas are used in a link of SWMM 5. The weighted hydraulic radius (Rwtd) is a function of the Froude Number of the link and the upstream and downstream hydraulic radius.  The Rwtd value is used in the computation of […]

Orifice Critical Depth for Separating Weir Flow from Orifice Flow for Bottom Outlet Orifices in SWMM 5

Note:  Orifice Critical Depth for Separating Weir Flow from Orifice Flow for Bottom Outlet Orifices   The Critical height is the opening where weir flow turns into orifice flow. It equals (Co/Cw)*(Area/Length) where Co is the orifice coeff., Cw is the weir coeff/sqrt(2g), Area is the area of the opening, and Length = circumference of the opening. […]

SWMM 5 Pump Curve Head/Flow Curves (1)

Subject:  The Pump flow is based on the lookup table you enter for the pump (Figure 1).  At each iteration during each time step of the solution SWMM 5 will look up the flow for thepump based on the current control variable across the pump.  […]

เครื่องคิดเลข EPA แห่งชาติ Stormwater

เครื่องคิดเลข EPA แห่งชาติ Stormwater ได้รับการปล่อยตัวในวันนี้โดย EPA (ดร. ลูอิส Rossman) เป็นสหรัฐอเมริกาทั่วประเทศ Stormwater เครื่องคิดเลข เป็นเครื่องมือใหม่บนพื้นฐานของ SWMM ที่อาจจะเป็นที่สนใจนี่คือ จะให้ผู้สร้างแบบจำลองที่ไม่ได้ด้วยวิธีที่ง่ายและรวดเร็วอย่างจริงจังประเมินปริมาณน้ำที่ไหลบ่า stormwater จากคุณสมบัติของพวกเขา สำหรับผู้เชี่ยวชาญ SWMM คุณก็มีวิธีง่ายๆในการดาวน์โหลดข้อมูลปริมาณน้ำฝนในระยะยาวและอัตราการ ET รายเดือนสำหรับการใช้งานในรูปแบบของคุณ SWMM  ของ EPA เครื่องคิดเลข Stormwater แห่งชาติขณะนี้มีให้สาธารณะ  http://www.epa.gov/nrmrl/ wswrd / WQ / รุ่น / […]

ईपीए राष्ट्रीय stormwater कैलक्यूलेटर

ईपीए राष्ट्रीय stormwater कैलक्यूलेटर एक संयुक्त राज्य अमेरिका राष्ट्रव्यापी stormwater कैलक्यूलेटर है ईपीए (डॉ. लुईस Rossman) द्वारा आज जारी  यहाँ ब्याज की हो सकती है कि SWMM के आधार पर एक नया […]

EPA 국립 폭풍우 계산기

EPA 국립 폭풍우 계산기 미국 전국 강우 계산기입니다 EPA (루이스 박사 Rossman)에 의해 오늘 발표  여기에 관심이있을 수 있습니다 SWMM에 따라 새로운 도구가있다. 그것은 엄격하게 그들의 속성에서 강우 유출수 볼륨을 추정하는 빠르고 쉬운 […]

EPA國立雨水計算器

EPA國立雨水計算器 今天公佈的EPA(劉易斯·羅斯曼博士)是一個美國全國雨水計算器 這裡是一個新的工具,基於SWMM的利益,這可能是。它提供了一個快速簡便的方法,嚴格從他們的物業估計雨水徑流量的非建模。你SWMM專家,它提供了一個簡單的方法來下載長期降雨SWMM模型使用的數據和每月ET率是現已到的公共EPA的國家雨水計算器  / WQ /模型/的SWC / EPA的國家雨水計算器是一個桌面應用程序,估計每年雨水量和頻率的徑流來自特定網站在美國的任何地方。估計是基於當地的土壤條件,土地覆蓋,與歷史雨量紀錄。  計算器訪問幾個國家數據庫提供了土壤,地形,雨量,蒸發選址信息。用戶提供網站的土地覆蓋信息,並選擇低影響開發(LID)控制的類型,他們想用盧羅斯曼供水和水資源部國家風險管理研究實驗室美國 環保局辛辛那提,俄亥俄州45268 EPA全國雨水計算器圖形用戶界面 via Blogger http://www.swmm5.net/2013/07/epa.html

Meaning of a Node Continuity Error of 100 Percent in SWMM 5

Note:  A continuity error of 100 percent for some nodes in SWMM5 simply means that the total lateral flow and total inflow from the upstream links and the outflow to downstream links is zero.    via Blogger http://www.swmm5.net/2013/07/meaning-of-node-continuity-error-of-100.html

SWMM 5 Aquifer has a Saturated and Unsaturated Zone

Note:  The unsaturated upper zone soil moisture varies between the initial upper zone moisture fraction to the porosity fraction for the soil.  The soil moisture content is for the SWMM5 Aquifer which can cover more than one Subcatchment in your simulation […]

InfoSWMM and H2oMAP SWMM Output Statistics Manager

Note:  You can use the Output Statistics Manager in InfoSWMM and H2OMAP SWMM to compute the mean and maximum peak flow for ALL of the links or the mean and maximum depths of all nodes in your network. Once you have calculated the […]

SWMM5 Runoff and Depth Relationships

Note:  The surface runoff is a non linear function of the independent depth in both the pervious and impervious areas of the subcatchments.   No surface runoff occurs until the depth over either the impervious or pervious area is greater than […]

How to Make a New Project INI file for InfoSewer

Note:  How to Make a New Project INI file for InfoSewer Step 1: Make a new InfoSewer Project as a New Empty Map and use the ArcGIS Default as the spatial reference. Step 2:  Save your new empty model. Step 3:  Copy your old model DB folder to the new MyEmptyModel DB folder Step […]

InfoSWMM and H2oMAP SWMM Map of the Maximum Surcharge Depth Over Highest Pipe Crown

Note:  You can copy and paste information from the Junction Output Summary to a newly created Junction Information DB Column so that you can use Map Display to visually see the newly saved output […]

SWMM5 Groundwater Flow Components

Note:  There are three sub flow components in the calculation of the groundwater flow from a SWMM 5 Subcatchment.    1st Component: Flow = Groundwater Flow Coef. * (LowerDepth – Aquifer Bottom to Node Invert) ^ Groundwater Flow Exponent   2 nd Component: Flow = SurfaceWater Flow Coef. * (Aquifer Bottom to Water Surface – Aquifer Bottom to […]

SWMM 5 Subcatchment Runoff and Depth Relationship

Note:  The surface runoff is a non linear function of the independent depth in both the pervious and impervious areas of the subcatchments.   No surface runoff occurs until the depthover either the impervious or pervious area is greater than […]

There are Three Types of Surfaces in each Subcatchment of SWMM 5

Note:  There are Three Types of Surfaces in each Subcatchment of SWMM 5.  The overall depth in a subcatchment is the weighted average of the impervious without depression storage area, the impervious with depression storage area and the pervious area depth.  […]

The total flow from a Subcatchment in SWMM 5

Note:  The total flow from a Subcatchment is the sum of the flow from the impervious area with and without depression storage and the pervious area with depression strorage.  The same width, slope but different roughness applies to the impervious […]

Link Depth and Node Depth Relationship in SWMM 5

Note:  The depth in a manhole or node in SWMM 5 can be higher than the depth in the connecting links if the link is surcharged.  Typically the upstream link depth is equal to the upstream node depth (if there is not link offsets) and the downstream link depth is equal to the downstream node depth (if […]

Average Number of Node Iterations in SWMM 5 Dynamic Wave Saolution

Subject:  SWMM 5 will iterate for the new node depth at each time for a minimum of 2 iterations to a maximum of 8 iterations based on the Node Continuity equation.  If you plot the average number of iterations over time then typically the number of iterations go up […]

Export from WeatherUnderground using the CSV File Export Option to InfoSWMM

Note:  Export from WeatherUnderground using the CSV File Export Option to InfoSWMM    Weather Underground is a site that provides excellent local weather information in the form of graphs, tables and csv files. You can use the data very easily in InfoSWMM by copying from Excel to a time series in InfoSWMM. Here is the rainfall for […]

SWMM 5 Interface Guide Tips

SWMM 5 Interface Guide Tips   SWMM 5 has a Interfacing guide on http://www.epa.gov/ednnrmrl/models/swmm/index.htm#Downloads for creating a VB, Delphi or command line C program to both run and printout some of the output file results from SWMM 5.   The readme file is self explanatory […]

Create Watersheds Using InfoSWMM Subcatchment Manager

Subject:  Create Watersheds Using InfoSWMM Subcatchment Manager     The Subcatchment Manager of InfoSWMM will  help calculate most of the  physical parameters associated with a Watershed or Subcatchment in SWMM 5 from a Digital Elevation Data (Step 1).  The Subcatchments area created from a Flow Direction Raster (Step 2) and a Flow […]

Display Feature Options for InfoSewer and InfoSWMM

Display Feature Options for InfoSewer and InfoSWMM Or, how to manage your active and inactive network in a scenario Display Feature Options for InfoSewer and InfoSWMM via Blogger http://www.swmm5.net/2013/07/display-feature-options-for-infosewer.html

SWMM 5 Link Time Step Calculations

SWMM 5 Link Time Step Calculations It you select the variable time step option in SWMM 5 then the program will compute the CFL time step for each link based on the ending system variables in the last time step based on the following steps.  The smallest value of t is […]

Real Time Control (RTC) rule for the opening and closing of an orifice in SWMM 5

Here is an example Real Time Control (RTC) rule for the opening and closing of  an orifice.   RULE Orifice1 IF SIMULATION  CLOCKTIME >=  01:00:00 AND SIMULATION CLOCKTIME <=  2:00:00 THEN ORIFICE OR1@82309b-15009b SETTING = 1 ELSE ORIFICE OR1@82309b-15009b SETTING = 0 PRIORITY 1 ; Opens […]

LPS Output Units when the Inflow is CMS in InfoSWMM and H2OMap SWMM

LPS Output Units when the Inflow is CMS 1.   The inflow time series is in units of CMS,2.   If you set the internal units to LPS in Run Manager,3.   Set the output units to LPS in Output Unit Manager,4.   Add a Scale multiplier of 1000 in the Inflows DB Table then The inflows do not have to be altered, the internal model flows […]

Example RTC rule for the opening and closing of the orifice in SWMM5

Here is an example Real Time Control (RTC) rule for the opening and closing of  an orifice in SWMM5. RULE Orifice1 IF SIMULATION  CLOCKTIME >=  01:00:00 AND SIMULATION CLOCKTIME <=  2:00:00 THEN ORIFICE OR1@82309b-15009b SETTING = 1 ELSE ORIFICE OR1@82309b-15009b SETTING = 0 PRIORITY 1 ; […]

Orifice Open and Close Speed and the Target Setting

Orifice Open and Close Speed and the Target Setting In SWMM 5 there is an orifice parameter called setting which opens or closes the orifice opening by modifying the depth of the orifice.  The setting is  based either on a RTC rule of the orifice or the Flap Gate condition […]

Conduit Lengthening in SWMM 5

Conduit Lengthening in SWMM 5 If you use the conduit lengthening option in SWMM 5  then your short conduits will be lengthened based on the CFL or explicit time step criterion.  Any conduits in which the Length Factor or the courant time step link length over the original length is greater […]

The Three Flows in SWMM 5 for a Link

The Three Flows in SWMM 5 for a Link   There are actually three flows computed or used for a link in SWMM 5:   1.    The St. Venant Flow equation flow 2.    The Upstream Normal Flow Manning’s equation based on the link roughness, slope, upstream cross sectional area and […]

How to Use the SWMM 5 Excel Tool with InfoSewer CSV Files

How to Use the SWMM 5 Excel Tool with InfoSewer CSV Files   1. Export Link and Manholes in InfoSewer for your current Scenario to CSV files, 2. Set up the Excel Add on for SWMM 5 by using the command Tools, and Configure Tools (see below) 3. Run SWMM 5 and edit the […]

Arc Map If Statements for Showing Flooding in InfoSWMM

Arc Map If Statements for Showing Flooding in InfoSWMM   You can use a combination of the Map Display in InfoSWMM and the Arc Map Label Properties to show the Maximum Ponded Volume at a node during amInfoSWMM simulation.    The label function in VBSCRIPT to show just […]

InfoSewer Inflow Control for a Pump with a Pump Curve

InfoSewer Inflow Control for a Pump with a Pump Curve   You can control the pumps in InfoSewer and H2OMap Sewer by using a Pump Control which will control the pump based on:  1.       Volume 2.      Level 3.      Discharge 4.     Inflow 5.      Time  If you use a By Inflow control the pump speed of the pump is increased or decreased to make […]

What are the LID Control Flow Source Options in SWMM 5?

What are the LID Control Flow Source Options in SWMM 5?   The SWMM 5 options for Low Impact Development (LID) controls on a Subcatchment are very flexible, exciting, possibly recursive and a completely integrated method to treat both the pervious and impervious flow.  You can […]

Batch Simulation for InfoSewer, InfoSWMM or InfoWater, H2oMap SWMM, H2OMap Sewer and H2OMap Water

Steps to set up a new icon for Batch Simulation in InfoSewer, InfoSWMM or InfoWater 1. Customize Arc GIS 2. Add an Icon 3. Run the command using the Icon   via Blogger http://www.swmm5.net/2013/07/batch-simulation-for-infosewer-infoswmm.html

Global Dry Weather Flow Reduction in InfoSWMM and H2OMAP SWMM – Updated

Global Dry Weather Flow Reduction in InfoSWMM and H2OMAP SWMM A cool tip to reduce the overall dry weather flow in InfoSWMM and H2OMAP SWMM without changing the mean dry weather flow is to do the following: 1.       Make a Reduction or Increase Flow Pattern in the Operations tab of the Attribute Browser (2), 2.      For example, if we want to […]

How to Compile SWMM 5 in Visual Studio 2010 Express

How to Compile SWMM 5 in Visual Studio 2010 Express Download the newest SWMM 5 code(Figure 1) from http://www.epa.gov/nrmrl/wswrd/wq/models/swmm/#Downloads and then make a new directory on your computer. We will call it c:\newSWMM5Code with a subdirectory C:\newSWMMCode\VC2005_DLL  in which the attached vcxproj file is placed.  […]

How to Use Trace Upstream, Domain Manager and Facility Manager in InfoSewer to Find the CE

Subject:   How to Use Trace Upstream, Domain Manager and Facility Manager in InfoSewer to Find the CE   InfoSewer does not have table of node continuity errors only an overall continuity error balance.  If you have a continuity error then you can use the process of divide and conquer […]

Wikipedia Traffic for the SWMM versus EPANET Articles

Subject:  Wikipedia Traffic for the SWMM versus EPANET Articles Wikipedia has one article for EPANET and three articles for SWMM 5 (two are redirected to the Stormwater Management Model Main Article).  The statistics for the last three years (data before 2007 is unavailable) show an average […]

Steps to take and rules for Cloning Datasets in InfoSWMM and InfoSewer

Note: Steps to take and rules for Cloning Datasets in InfoSWMM and InfoSewer Before cloning an active dataset, the user should switch to the Base Scenario.  This saves the active datasets and allows the user to clone the dataset with all edits.  This is a brief description of […]

How to Make an Internal Outfall into an External Outfall when you have more than one link connected to an Outfall in InfoSWMM

Subject:  How to Make an Internal Outfall into an External Outfall when you have more than one link connected to an Outfall Step 1:  Identify the Problem “ERROR 141: Outfall J-561 has more than 1 inlet link or an outlet link.” Means […]

WARNING 04: minimum elevation drop used for Conduit – What Does this Message Mean in SWMM 5?

Subject:  WARNING 04: minimum elevation drop used for Conduit  – What Does this Message Mean?   This message means that the elevation drop across the link  is less than the minimum allowable drop or (0.001 /3.048 meters)   Elevation1 = Link Offset Upstream + Upstream Node Invert   Elevation2 = Link Offset Downstream + Downstream Node […]

How to Determine if your model is Unstable in SWMM 5 or InfoSWMM

Subject:  How to Determine if your model is Unstable in SWMM 5 or InfoSWMM SWMM 5 and InfoSWMM has a good output feature in the RPT file that tells you the list of links with the highest flow instability during the simulation.  If you look at the link flow […]

The relationship between the rainfall, total losses from the previous area, evaporation and infiltration only rate for SWMM 5

Subject:  The relationship between the rainfall, total losses from the previous area, evaporation and infiltration only rate.   The total loss from a subcatchment pervious area is the sum of the evaporation + infiltration loss.  Typically the evaporation rate is much less than the infiltration rate. SWMM 5 now has too options – evaporation during only dry periods or evaporation during both wet and dry periods.   Figure […]

Making your inactive elements active in different alternative scenarios in InfoSWMM

Subject:  Making your inactive elements active in different alternative scenarios in InfoSWMM   Step 1:  Open up the Facility Manager and turn off Apply to Active Facility Only, click on Map Selection […]

Risk Assessment Manager in InfoSWMM

Subject:  Risk Assessment Manager in InfoSWMM   If you can get the Risk Assessment Manager than you can do a flooding extent based on the Maximum Head or just the Flooded Nodes.       via Blogger http://www.swmm5.net/2013/07/risk-assessment-manager-in-infoswmm.html

What are the Units for the five St. Venant Flow Terms in SWMM 5 and InfoSWMM?

Subject:  What are the Units for the five St. Venant Flow Terms in SWMM 5 and InfoSWMM?   The new flow (Q) calculated at during each iteration of time step as   (1)        Q for the new iteration = (Q at the Old Time Step – DQ2 […]

How to use SWMM 5 DOS to make an Output Table in the RPT file

Subject:   How to use SWMM 5 DOS to make an Output Table in the RPT file You can make tables of the node,  link  and  Subcatchment output data in SWMM 5 if you use the DOS SWMM 5 program but not the Windows DLL.   Step 1 is to create the DOS batch file, Step 2 is to select the nodes, links and subcatchments, Step 3 is to run the […]

How is RHO computed for a Link in SWMM 5?

Subject:  How is RHO computed for a Link in SWMM 5?   SWMM 5 uses a sliding metric to calculate the cross sectional area and hydraulic radius used in the simulation for the link dynamic flow.  The area and hydraulic radius used moves […]

Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5

Subject:  Hysteresis Effect in the Link Flow versus Depth Relationship in SWMM 5 You can often get a hysteresis effect for the Flow versus Depth relationship in SWMM 5 due to the five component St. Venant equation used to simulate the flows (http://swmm5.blogspot.com/2010/12/what-are-units-for-five-st-venant-flow.html) .  A hysteresis effect is having two or more flow values for the same depth value in the link. […]

Innovyze Expands Channel Partner Relationship with HR Wallingford

Press Room | Products | News | Events | The Company   Innovyze Expands Channel Partner Relationship with HR Wallingford Firm to Distribute and Support Innovyze Product Line in Malaysia Broomfield, Colorado, USA, July 26, 2013 — Innovyze, a leading global innovator of […]

Flow Units In InfoSWMM may be different then the Output Link Flow Units

Note:  Flow Units In InfoSWMM may be different then the Output Link Flow Units   The flows units selected in Run Manager determines the flow units of all incoming units including DWF, Inflow Time Series and other features in pump curves and other curves.  The output unit manager determines what you see when you […]

Export from WeatherUnderground using the CSV File Export Option to InfoSWMM

Note:  Export from WeatherUnderground using the CSV File Export Option to InfoSWMM    Weather Underground is a site that provides excellent local weather information in the form of graphs, tables and csv files. You can use the data very easily in InfoSWMM by copying from Excel to a […]

Time Step Selection in InfoSWMM and SWMM5

1st The time step you use in SWMM 5 is controlled from the top by the rainfall interval (Figure 1):   1.   All of your time steps should be less than the rainfall interval, 2.   The hydrology time step should be less than or equal to the […]

InfoSewer Inflow Control for a PUMP

InfoSewer Inflow Control for a PUMP   You can control the pumps in InfoSewer and H2OMap Sewer by using a Pump Control which will control the pump based on:   1.       Volume 2.      Level 3.      Discharge 4.      Inflow […]

Calibration data in H2OMAP SWMM, InfoSWMM and SWMM 5 does NOT have to be at the same time step

Calibration data in H2OMAP SWMM, InfoSWMM and SWMM 5 does NOT have to be at the same time step pic.twitter.com/S1leombWqs— RDickinson (@RDickinson) July 1, 2013 via Blogger http://www.swmm5.net/2013/07/calibration-data-in-h2omap-swmm.html

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