SWMM56

Subject:    My History with Various Versions of SWMM: SWMM3, SWMM4, SWMM5, XP-SWMM and InfoSWMM I first learned about SWMM in a brochure from the University of Florida when I was just a 17 year old senior in High School.  Water resources and the description of SWMM seemed to be worthy career goals at the time and I have been extremely lucky to have the opportunity to work and develop many SWMM related products in my working life.   I am especially proud that SWMM 3, SWMM 4 and SWMM 5 are both public domain and open source software.  You can open up and look at the code and add features and internal tests on your own.   You can customize the input and output of SWMM 5 if you want to but most importantly you have direct access to the source code so you can verify the computational algorithms. InfoSWMM is an Arc GIS extension that works in Arc Map but we at Innovyze are proud that we have superb import and export features to SWMM 5 from Arc Map and u...

Note:   Format of the SWMM 5 Interface File Here is an example and Figure 1 shows the format (from Iface.c in SWMM 5) SWMM5 Interface File This is from the 1st line of the SWMM 5 Model in the Title/Notes Section of the Data 900  - reporting time step in sec 1    - number of constituents as listed below: FLOW CFS 1    - number of nodes as listed below: 10208 Node             Year Mon Day Hr  Min Sec FLOW 10208            2011 02  22  00  00  00  0.000000 10208            2011 02  22  00  15  00  0.000000 10208            2011 02  22  00  30  00  0.000000 10208            2011 02  22  0...

Subject:    How to Use the Variable Flow Percentage Flow Splitter in InfoSewer How to use the Flow Splitter in InfoSewer for Dendritic Networks by  dickinsonre Subject:   How to use the Flow Splitter in In foSewer for Dendritic Networks InfoSewer, which is an extension in Arc Map, does need to have slit split defined where gravity mains merge together to determine the amount of flow in each of the downstream conduits (Figure 1).   The options for the flow splitterin each of the downstream links are: 1.        Automatic Allocation 2.        Fixed Flow Percentage 3.        Variable Flow Percent age and 4.        Inflow-Outflow Curve   At an outfall where the invert of the outfall pipe is raised compared to the inverts of the incoming...

Fifty Years of Watershed Modeling – Past, Present and Future September 24-26, 2012 Boulder, Colorado On behalf of Engineering Conferences International and the conference chairs,  Anthony S. Donigian, Jr.  (AQUA TERRA Consultants), and Richard Field  (US Environmental Protection Agency/ORD [retired], Michael J. Baker Jr., Inc.), it is my pleasure to extend this invitation to you to participate in  Fifty Years of Watershed Modeling – Past, Present and Future  to be held September 24-26, 2012 at NCAR (National Center for Atmospheric Research – Center Green Campus) in Boulder, Colorado. Continuous Simulation using SWMM 5 LID and Groundwater Features in a Linked 1D/2D Network using InfoSWMM 2D for a 50 Year Period has been accepted for  Poster Presentation  at the forthcoming conference  Fifty Years of Watershed Modeling: Past, Present and Future  to be held September 24-26, 2012 at  National Center for Atmospheric Research (NCAR – Cent...

InfoSWMM v11.1: Support ArcGIS 10.1. InfoSWMM or H2OMAP SWMM import: corrected the typos in error messages. (HsHxfSvr.dll, N/A, 6/22/2012) Improvement: for better hours/minutes listing in Report Manager Report Table for Continuous Simulation with Odd Report Time Step Intervals.  For example, this fix improved the output time display for irregular (in 60 minute sense) output time steps.  Now it displays 00:50, 01:40, etc. more correctly than before (00:49, 01:39, etc). (HsOutPkg.dll, N/A, 6/21/2012) Improvement or Bug Fix: Added an IF statement to the RDII Unit Hydrograph Convolution for the  rare instances in which the user sets the time base of the UH to zero by setting either T or K to zero.  The Time Base is T*K in the convolution integral and zero values are not allowed.  This bug was also forwarded to the EPA for a future SWMM 5.  The convolution uses the value of R and the Time Base to estimate the amount of Infiltration and Inflow in the Sewer Networ...

Subject:   How to Make a SWMM 5 Interface File from InfoSWMM   The steps are easy: 1.         Make all Links Inactive by using the Facility Manager 2.        Save the flows to the OUTFLOWS file of InfoSWMM 3.        The Outlet Node of Each Subcatchment will be save to the Text File 4.        Use the Created OUTFLOWS file as the INFLOWS file in SWMM5

Subject:    How is Capillary Suction Head Used in SWMM 5 Green-Ampt? How is Capillary Suction Head Used in SWMM 5 Green-Ampt? by  dickinsonre Subject:    How is Capillary Suction Head Used  in SWMM 5 Green-Ampt? How sensitive is the infiltration loss and rate to the capillary suction head  parameter in the SWMM 5 Green-Ampt   infiltration method.   Figure         1 shows how the total infiltration loss and total loss rate vary as you change the suction head from 12 to 6 to 3 inches.    Internally the suction head is used in infil.c of SWMM 5 by adding the suction head to the ponded water on the pervious area in the parameter c1 of the implicit Green-Ampt SWMM5 solution. C1 =  (Suction Head + Depth of Ponded Water) * IMD o...

Subject:    How are Negative Transect Elevations Used in SWMM5?   How are Negative Transect Elevations Used in SWMM5? by  dickinsonre Subject:    How are Negative Transect Elevatio ns Used in SWMM5? You can have negative elevations in the Transects of SWMM 5 as the elevations are transformed internally to relative depths above the node inverts in the SWMM 5 engine (Figure 1).   The slope of the link is calculated from the link offset elevations (Figure 3) and the cross sectional information for the irregular link in SWMM 5 (Figure 2) is computed from the Transect data (Figure 4).   The Water Surface elevation of the link is based on the node inverts (Figure 5). Figure 1 .  Transect Editor of SWMM 5 Figure 2.   The Transect Data is Used in the Irregular of HEC-RAS Shape of SWMM 5 Figure 3 .  The slope of the link wi...

Subject:   Steps in Using RDII Analyst for InfoSWMM, ICM and InfoSewer Steps in Using RDII Analyst for InfoSWMM, ICM and InfoSewer by  dickinsonre Subject:   Steps in Using RDII Analyst for InfoSWMM, ICM and InfoSewer   Step 1: Create a Base UH  in the Operation Tab of the Attribute Browser using RDII Analyst (Figure 1) Step 2: Assign a UH to at Least 1 Node Using the Inflow Icon   Step 3: Open Up RDII Analyst and Click on New to Create a RDII Session     Step 4: Define the Flow and Rainfall File      Step 5: Review the Imported Flow Time Series Step 6: Review the Imported Rainfall  Time Series           Step 7: Units and RDII Analyst Dates are Controlled by the Simulation Manager    Step 8: Extract DWF from the Flow Time Series     Step 9: Assign a UH to at Least 1 Node Using the Inflow Icon   Step 10: View the DWF Pattern ...