Hello, I am working on real water distribution network models obtained from Water Utilities for academic purposes. I have received the following three files for each network: 1. DWG file; 2. Bentley WaterGEMS V8i file; 3. SQLITE file However, I am not able to open the file in my system and a message ' Unsupported DataSetType Schema' appears on the screen. How can I solve the issue and access the network file? Thanks and regards, Dina Zaman
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Forum Post: Inability to access a new WaterGEMS network file
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Forum Post: RE: SewerGEM - Modelling spill flow from one channel to another
HiJesse， To response to your suggestion, 1. I cannot combined the channels to model as a single link using irregular channel. The reason being each channel serving flow from different sources. Two channels take contaminated flow and one takes totally clean (the one that spill). To combined them i won't be able to resolve the problem as each of them drains to different pumping stations. 2. I have tried to model it with cross-section with a side weir as suggested. I have artificially raised the GL by 1m from Node 4-77 to CS-230. See spill at cross section CS-82, please note that the spill links is negative gradient as the model won't allow me to change the invert. Although with a 0.2 timestep can compute and the model show spilling to the added links, but the HGL on profile doesn't show that the flow spill into the added links (doesn't lowered). And yet, when the spill flow reaches the peak, the EGL on profile shoot to sky high. is this because of instability?(Please visit the site to view this file) 3. Use of a pond to do it would be too complicated and unrealistic. I have 4 locations with this problem. Please help!!!
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Forum Post: RE: Inability to access a new WaterGEMS network file
Hello Zaman, This could happen due to many reasons, If the model was saved in the higher version than you are having The output files have become corrupt The issue with the video card driver The below wiki explains the troubleshooting steps in detail, please go through them. Errors when opening model: "Unsupported dataset type schema" "Object Reference..." etc
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Wiki Page: Selecting catchments upstream of a certain element
Product(s): SewerGEMS, CivilStorm, StormCAD, SewerCAD Version(s): 08.11.XX.XX, 10.00.00.XX Area: Modeling Problem Is it possible to select all catchments upstream of a certain element? When using the "trace upstream" query, upstream catchments are not selected. Is it possible to select them? Problem ID#: 51655 Solution Currently, catchments that are assigned to nodes via the "outflow node" property are still not considered as being "upstream" and will not be selected when using the "Trace upstream" Network Navigator query. One possible workaround involves the use of the ArcGIS platform: 1) Open the model in SewerGEMS for ArcMap 2) Start an Edit session on the SewerGEMS model geodatabase 3) Go to SewerGEMS > View > Network Navigator. 4) Under Network Trace, choose "Trace Upstream", then select the desired downstream element (the element whose upstream catchments you want to select) 5) Click the "select in drawing" button 6) Go to the Selection menu and choose "Select By Location". 7) Choose to "select features from" the catchment layer, that are "within a distance of" the catch basin layer. If the catchments are closer to the conduits or if you're using manholes, select that instead. Be sure to check the box for "use selected features", so that it considers the elements that the query just selected. Enter an appropriate tolerance, which will be the distance between the catchbasin and the catchment. You'll need to choose a distance that's large enough to select catchments that should be selected, yet small enough so as not to select catchments that should not be selected (that aren't actually upstream of the elements selected by the query). 8) Click Apply > OK - the upstream catchments should now be selected. 9) At this point, you can right click in the drawing (using the SewerGEMS Select tool), choose "edit group" and open the catchment table. it will be filtered to show only those catchments. Or, if you'd like to create a selection set for future use, right click in the drawing and choose "Create selection set". See Also Related forum post
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Wiki Page: Differences between solvers: GVF-Convex vs. GVF-Rational vs. Implicit vs. Explicit (SWMM)
Product(s): SewerGEMS, SewerCAD, CivilStorm, StormCAD Version(s): CONNECT Edition, V8i Area: Modeling Problem What are the differences between the SewerCAD (GVF Convex Solver), SewerGEMS/CivilStorm (Implicit and Explicit Dynamic solvers), and StormCAD (GVF Rational Solver)? When should I use StormCAD instead of CivilStorm? Solution The SewerCAD GVF Convex solver uses convex routing and a gradually varied flow profile for design and analysis of of sewer networks including mixed gravity and pressure flow. SewerGEMS is a superset of SewerCAD, including all its functionality, plus two fully dynamic solvers (Implicit and Explicit) and ArcGIS integration support. SewerGEMS Sanitary was a separate program included with older versions of SewerGEMS V8i (08.11.01.21, 08.11.02.46, 08.11.02.49 and 08.11.02.75). It is installed automatically when installing these versions of SewerGEMS and includes all the functionality of the Bentley SewerCAD product, plus the ability to work inside of ArcGIS. As of SewerGEMS V8i SELECTseries 3 (08.11.03.77+) SewerGEMS Sanitary is no longer available with this specific brand name because of the conversion of all of our storm and sewer products into a unified file format. The unified file format now allows all the storm sewer products (StormCAD, SewerCAD, SewerGEMS, CivilStorm, and SewerGEMS) to open a model created in another product. In creating the unified schema SewerGEMS has been changed to incorporate all the storm sewer solvers, so if you want to run the SewerCAD solver (GVF-Convex) on your network you have the option to. This is really the same thing as having SewerGEMS Sanitary come with SewerGEMS, except you no longer need to open a separate program, and you also have the option to run the GVF-Rational (StormCAD) solver for your model if you choose. In other words, With the SewerGEMS SS3 release Bentley accomplished a convergence of SewerGEMS Sanitary modeling fully into SewerGEMS. As a result SewerGEMS embodies effectively a superset of the capabilities delivered in StormCAD, CivilStorm, SewerCAD, and SewerGEMS. All consolidate into a common data store. All differentiate by the computational solvers that are selectively packaged into each product in service to a range of commercial use-cases across stormwater, sanitary, and combined systems. With this release SewerGEMS Sanitary was deprecated. It was cleanly folded into the SewerGEMS application. How do I know which solver is best for me to use? SewerCAD (GVF Convex) vs. SewerGEMS (Implicit and Explicit) The SewerCAD application (and the GVF Convex numerical solver in SewerGEMS) is best used in systems that have complicated pumping, pressure sewers, and only need to use extended period simulation convex (EPS) routing as opposed to fully dynamic routing. SewerCAD should also be used if you need to perform a constraint-based automated design or if you need to run a steady state simulation, such as for a peak flow analysis with Extreme Flow methods. SewerCAD can be thought of as a bread-and-butter package that delivers conventional design and capacity analysis. Municipal-scale master planning is certainly part of it, but serves very well in site/civil arena as well. Routing is hydrologic with conventional back-water dominant hydraulics. Gravity analysis is complete with well-accepted state-of-the-practice hydraulic grade analysis with form losses. Diversions or splits are handled in explicit ways. I&I, similarly, is modeled using an array of fundamental and appropriate simplifying models. On the other hand, the SewerGEMS/Civlstorm applications layer into the mix solvers for dynamic wave simulation (implicit and explicit (SWMM), with ArcGIS integration support. So, if you have challenging cross-connections, loops or dynamic surcharging and ponding, this gives you the capabilities of EPA SWMM along with Bentley's own implicit solver. SewerGEMS (Implicit or Explicit Dynamic numerical solvers) is best for analyzing existing problematic systems, where catchment rainfall-runoff calculations are required or dynamic wave solutions are needed (if required by the reviewer or by way of the complicated nature of the particular network) or if you must work inside the ArcGIS platform. SewerGEMS can handle complex things like control structures, diversions (without having to enter a diversion rating curve required in SewerCAD/GVF Convex solver) or ponds. Long term continuous simulations would be done using the Explicit solver in SewerGEMS. The "solver" refers to the type of numerical finite difference solution used to solve the St. Venant equations, which describe unsteady one-dimensional, free surface flow. The software contains two different solvers:: Implicit solver - Uses a four-point implicit finite difference solver to find the numerical solutions for the hydrodynamic Saint-Venant equations. This solver is based on the National Weather Service FLDWAV model. The implicit solver tends to be more stable with pumping situations. Explicit (SWMM) solver - Uses the solver from the EPA Stormwater Management Model version 5 (SWMM). The results from this solver should exactly match the results from SWMM 5. The explicit solver tends to be more stable with fast changing areas such as ponds or control structures where the flow or elevation changes quickly over multiple time steps. There is an initial elevation attribute for manholes using the SWMM engine so that the calculation can simulate a filling process if the initial elevation is lower than the downstream start elevation. However in the Implicit engine the manhole initial elevation is not considered, so the initial manhole elevation is assumed to be the same as the downstream start elevation. Inflow hydrographs are also handled differently by the two engines. The implicit engine interpolates flows between the final flow in the hydrograph and the end time. The SWMM engine assumes that all flows after the final inflow point are zero. *Note: If a catchment is using the EPA SWMM runoff method and not using the default infiltration method specified in the SWMM calculation options then neither hydrology or network will calculate. If you are not using the EPA SWMM runoff method, then any combination of other runoff methods can be used. GVF-Convex (SewerCAD) solver is not intended to handle overflow situations such as a case where you want to analyze a problematic existing system. When an overflow condition arises with the GVF Convex solver, the HGL is reset to the rim for an overflow condition. However, the dynamic solvers in SewerGEMS (Implicit and Explicit SWMM solvers) do handle overflow, as they are intended for situations like this (problematic existing systems and/or complex situations). SewerGEMS Implicit and Explicit solvers automatically calculate the overflow using the weir equation. So, SewerGEMS differentiates in the market as being a singular, "top of the line" tool that will carry the engineer though all stages of design and analysis from conventional capacity and automated design of pipe networks into complex hydraulics of combined-sewer systems. SewerGEMS will handle both storm and sanitary models. Importantly, if you have any old StormCAD, SewerCAD or CivilStorm files they can all be loaded into SewerGEMS and brought cleanly ahead. The GVF Rational Solver Note: Currently the StormCAD numerical solver is included with CivilStorm, so CivilStorm has all of the functionality of StormCAD included, by way of selection of GVF Rational as the active numerical solver. The StormCAD product (and the GVF Rational Solver in SewerGEMS and CivilStorm) uses the rational method to analyze or design a system under peak flow conditions based on peak rainfall intensity, while the other solvers in CivilStorm and SewerGEMS such as the Implicit or Explicit, takes rainfall hyetographs (rain vs. time) and develops hydrographs (flow vs. time) for each pipe and routes the flows dynamically. If you are studying a small area where only peak flow is of interest, or if you need to design a system based on the standard rational method, then StormCAD or the StormCAD solver (GVF Rational) should be adequate. If you are working on a large area where hydrograph routing and storage are significant, where you need to use a dynamic solver, or if you need to otherwise analyze more complex effects such as flooding and controls structures, then the Implicit and Explicit solvers in CivilStorm (or SewerGEMS) is what you need. If you get involved with combined sewers where rain and sanitary sewage is carried in the same pipe, we recommend you use one of the dynamic solvers in SewerGEMS. See Also StormCAD FAQ SewerCAD FAQ SewerGEMS FAQ Conduit start/stop control structures
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Forum Post: RE: HELP WITH STORMCAD MODEL, PLEASE
yes sir , i added a pump to the line and the pump raise the HGL put still have a pressure condition and flooded nodes. so what should i do ??? .. i tried to add another pump put the progrm refuse ( no parllel pump)
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Forum Post: RE: HELP WITH STORMCAD MODEL, PLEASE
so you say if i want to use a pump to rais the water from a wet well to a higher outlet ... i have to use another program !!!
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Forum Post: what is the solution for this message (in stormcad) ???
44002 "Base" "Catch Basin" "55" "CB-1" (N/A) " When the Inlet Location is 'On Grade', the Longitudinal Slope (Inlet) should be greater than zero. " Hydraulic Results
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Wiki Page: Using Element Property Inferencing to infer and assign invert elevations to elements
Applies To Product(s): SewerGEMS, CivilStorm, StormCAD, SewerCAD Version(s): 08.11.XX.XX, 10.00.00.XX Original Author: Tom Walski, Mark Pachlhofer, and Sushma Choure, Bentley Technical Support Group Problem I'm trying to assign invert elevations on the manholes in my network because I have limited information about the network. Is there any method that I might try in order to assign inverts accurately to my network? Solution 1) We have a tool called the Element Property Inferencing tool that you could try using. There are two general use cases for this tool Layout new manholes - In this case, the user knows the elevations of the manholes at the beginning and end of a run and the physical properties of the downstream conduit, but has not yet placed the intervening manholes and pipes. The user indicates the number of manholes that will be places in the gap and they will automatically be inserted. This is useful in laying out new systems. Follow existing path - In this case, the user has laid out the manholes and the conduits between them. The user employs this tool to assign properties to the elements between the upstream and downstream nodes. This is more useful in filling in details of the system when the path is already determined whether for a new or existing run of conduits. There is more information on using this tool that can be found in the 'See Also' section below and in the Help documentation that comes with the software. Another option would be to take some constant and subtract that from the ground elevation if you have that. For this case you will probably need to do some research on typical pipe laying practice for this system. A question to ask yourself is: When the system was designed did they try to maintain a constant depth? In that case you can subtract a constant from the ground elevation (with exceptions of course). If they tried to maintain a constant slope, you can pick a run of pipes over which the ground slope is relatively constant and use pipe inferencing over that long run of pipes instead of pipe-by-pipe. The best solution to this issue is to find the profile drawing from the time that the pipes were laid and use that. It's a lot of work, but it only needs to be done one time. Note: The element property tool doesn't interpolate invert levels between drop manholes, i.e. when the start & stop invert levels are different. It would only work when the "Set invert to start/stop?" property is set to 'True'. We have logged enhancement #175199 which is being considered for a future release of the product. With reference to profile above: Suppose that we want to interpolate between MH-1 and the Invert (In) for MH-3. 1) Manually set the invert of MH-3 equal to the stop invert of CO-2 (it looks like this is around -1.00 m) 2) Choose "True" for "Set invert to Start?" and "Set invert to Stop?" for CO-1 and CO-2 3) Run the element property inferencing tool to interpolate a constant slope between MH-1 and MH-3 4) Choose 'False' for "Set invert to Stop?" in CO-2 and re-enter the stop invert 5) Set the invert of MH-3 back to the original value (-1.54 m) (Please visit the site to view this video) See Also How do I run the element property inferencing tool with a negative slop or an adverse slope?
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Wiki Page: How do the dynamic solvers calculate overflow from a catchbasin or manhole?
Product(s): SewerGEMS, CivilStorm Version(s): 08.11.XX.XX, 10.00.00.XX Area: Calculations Problem When using the Implicit or Explicit solver, when the HGL in a catchbasin or unbolted manhole reaches the rim elevation, how is the overflow rate calculated? Solution The answer depends on whether there is an attached gutter. Catchbasin with attached surface gutter link When the inlet is surcharged (i.e., the inlet node hydraulic grade line is above the ground rim elevation), the Saint Venant equations based dynamic calculation is applied instead of the HEC-22 based calculation. The physical size of the inlet opening is not used in this calculation; the overflow rate is primarily driven by the HGL and the physical properties of the adjacent link elements (no orifice/weir equation used). Imagine it as the water in the catchbasin vault spilling over into the cross sectional geometry of the downstream gutter or channel. Note that catchbasin overflow will pass down a connected downstream gutter, or a channel link element if the invert is set to the rim elevation. With the Explicit (SWMM) solver, a calculation option called "Inlet Transition Depth" is available, to help achieve a smooth transition in switching between the HEC-22 and dynamic equations when a surcharge condition is reached. The model needs a small transition depth within which the equations are gradually switched. The smaller the transition depth is, the more accurate results are but the model will be less stable. This calculation option gives user a control over the transition depth. Typical values are on the order of 0.1-0.5 feet and a default value of 0.5 has been proven to be satisfactory for most conditions. Catchbasin with no surface gutter, or bolted manhole For catchbasins with no downstream gutter link element, or for manholes with the "is bolted?" set to "false", overflow is calculated when the hydraulic grade exceeds the rim elevation. The overflow from the node ground is similar to flow over a weir, so a weir equation is used as follows (as also mentioned in the help topic "Pressure (Surcharged) Flow and Overflow (Street Flooding)"): Where Q over is the overflow discharge, L w is the overflow length, C is the discharge coefficient and C=3.0 is used, H is the head over the overflow elevation. Important Notes: For information on how overflow is handled with the surface storage option, please see the separate article below. The LPI Coefficient calculation option may need to be increased if overflow occurs due to backwater effects. See related article below. See Also Interpreting results when using manhole or catchbasin Surface Storage Zero overflow at manhole despite HGL above rim.
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Forum Post: RE: Modeling a Pattern (Demand) in the Unit Demand Control Center
Hi Ryan, I'd be glad to hear a little more on what you are modeling that requires demands to shut off after 5 seconds. Is this a real world condition or mimicking a what if? not quite sure how demands would in reality drop off like that unless there are fast acting control valves. A little more detail would help us better guide you if Jesse's response did not resolve the question.
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Wiki Page: When opening software the splash screen displays then goes away
Product(s): WaterGEMS, WaterCAD, HAMMER, SewerGEMS, SewerCAD, StormCAD, CivilStorm, PondPack, FlowMaster Version(s): 08.11.XX.XX and 10.00.00.XX Area: Installation Problem When opening a Bentley Hydraulics and Hydrology application, the splash screen displays but then goes away and the program never opens. [Problem ID#: 34304] [Problem ID# 33678] Background This error is due to a known conflict with Microsoft .NET framework 3.5service pack 1. This issue was resolved in the latest versions of each program, available on Bentley.com under Support > Support Services. To work around this issue, you can open the program via the managed starter. Solution The solution to this depends on your program version and operating system. Solution 1: Make sure the application version is compatible with your operating system Note that it is recommended to upgrade to the latest version of the software that is compatible with your operating system. If this problem is preventing your from opening the program and you aren't sure what version was installed, you can check by following these steps: 1) Browse to the folder where the program is installed to. For example, C:\Program Files\Bentley\WaterGEMS\ 2) Locate the WaterGEMS.exe file (or WaterCAD.exe or SewerGEMS.exe) right click on it and choose "properties" 3) Click the "Version" tab. Your build should be listed here, next to "file version". See: Platform Compatibility Solution 2: Corrupt Engineering Library Database Operating System: Windows XP Service Pack 2 Follow these steps: 1) First make sure that the Data Access Objects Windows component is registered. a. Open your windows explorer and browse to this folder: C:\Program Files\Common Files\Microsoft Shared\DAO\ b. Register the dao360.dll file. You can do this by right clicking it, choosing to open with and then browse to the regserver program, located here: C:\Windows\System32\regsvr32.exe c. You should receive a message stating that the module is registered. 2) Browse to and delete the following file: Windows XP: C:\Documents and Settings\ username>\Application Data\Bentley\EngineeringLibraries\Engineeringlibraries.mdb Where " username>" is the name of the user that you are currently logged in as. Windows Vista or newer C:\Users\ username>\AppData\Roaming\Bentley\EngineeringLibraries\Engineeringlibraries.mdb 3) Try opening the program. Solution 3: Open the software using the managed starter file The managed starter is a file located in your installation folder. Here is a list for a few of the applications: Windows XP: SewerCAD V8 XM: C:\Program Files\Bentley\SewerCAD8\Haestad.Alabama.Starter.exe SewerGEMS V8 XM: C:\Program Files\Bentley\SewerGEMS\Haestad.SewerGEMS.Starter.exe CivilStorm V8 XM: C:\Program Files\Bentley\CivilStorm\CivilStorm.Starter.exe FlowMaster : C:\Program Files\Bentley\FlowMaster\FlowMaster.Starter.exe Windows Vista or newer SewerCAD V8 XM: C:\Program Files (x86)\Bentley\SewerCAD8\Haestad.Alabama.Starter.exe SewerGEMS V8 XM: C:\Program Files (x86)\Bentley\SewerGEMS\Haestad.SewerGEMS.Starter.exe CivilStorm V8 XM: C:\Program Files (x86)\Bentley\CivilStorm\CivilStorm.Starter.exe FlowMaster : C:\Program Files (x86)\Bentley\FlowMaster\FlowMaster.Starter.exe Running this file will skip the splash screen and there should be no adverse effects. You can change your desktop/start menu shortcut to point to the managed starter. Solution 4: Engineering Library Incompatibility Download the following replacement Engineering library database: ftp://ftp.bentley.com/pub/tools/utilities/Haestad/Utilities/EngLib/EngineeringLibraries.mdb Choose to save it to the following folder, and overwrite the old one, if asked to: Windows XP: C:\Documents and Settings\ username>\Application Data\Bentley\EngineeringLibraries\ Where " username>" is the name of the user that you are currently logged in as. Windows Vista or newer C:\Users\ username>\AppData\Roaming\Bentley\EngineeringLibraries\Engineeringlibraries.mdb Solution 5: Perform a clean reinstallation See: How do I perform a clean uninstall and reinstall of the Hydraulic and Hydrology products? [Solution ID#: 500000061094] Solution 6: Remove Symantec EndPoint Protection and reinstall it If Symantec EndPoint Protection is installed and disabling it did not help with the problem remove it, install the software, and reinstall it. See Also Platform Compatibility How do I perform a clean uninstall and reinstall of the Hydraulic and Hydrology products?
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Forum Post: RE: SewerGEM - Modelling spill flow from one channel to another
Hello Boon, The huge EGL is due to very large start velocity in the channel. Because the channel link element used in this case (to model the weir that connects the parallel channels) will take on the cross sectional shape of the cross section node elements, it may be best to use the conduit element instead. Set the Section Type to "Virtual", then select your weir for the Start control structure. Note that you may need to use the Explicit (SWMM) solver with a very small Routing Step to achieve stable results in this model, due to the use of many control structures and ponds. See the comments in my email I sent to you for Service Request # 7000672123.
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Wiki Page: Sorting or filtering by the 'zone' field in the customer meters flextable is not working
Product(s): WaterGEMS, SewerGEMS, CivilStorm, SewerCAD, HAMMER, WaterCAD Version(s): 10.00.00.XX Area: Output and Reporting Problem The zone field in the customer meters flextable is not sorting in ascending/descending order and it's not providing the correct results using a query for filtering based on the zone. Solution This issue has been patched in version 10.00.00.55 and can be requested by submitting a service request or posting to the forum.
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Forum Post: SIG Virtual Workshop: Bentley Hydraulics & Hydrology − October 18, 2017 − You're Invited!
Mark your calendar for the next Bentley Hydraulics & Hydrology Special Interest Group (SIG) virtual workshop on Wednesday, October 18, 2017 at 9 a.m. EDT or 7 p.m. EDT . We will discuss how to connect with and leverage SCADA data to validate sanitary sewer models. Register today ! The agenda will include a technical presentation followed by a software demonstration using SewerGEMS CONNECT Edition. Topics covered will include: Importing SCADA data with the SCADAConnect tool in SewerGEMS CONNECT Edition Understanding and validating sewer models with real-world data (pump operation and I/I) These SIGs are structured to keep you informed, engaged, and working optimally wherever you are around the globe. Please note that the registration page displays in your local time zone as set on your computer. Attendance is complimentary and will be updated to your Bentley Transcript for self-reporting of continuing professional development. When joining the session, please use the Guest option. Visit the Bentley Hydraulics & Hydrology SIG Learning Paths to see available recordings from previous workshops: CONNECT Edition: http://learn.bentley.com/app/Public/ViewLearningPathDetails?lpId=110931 V8i: http://learn.bentley.com/app/Public/ViewLearningPathDetails?lpId=107909
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Wiki Page: How are inlet structure width and length used in the computations?
Product(s): StormCAD, CivilStorm Version(s): 08.11.XX.XX, 10.00.00.XX Area: Calculations Problem How are inlet structure width and length used in the computations for StormCAD (GVF-Rational solver) specifically? What hydraulic results are affected by increasing/decreasing length and width in a design? Problem ID#: 87805 Solution Width and Length in the inlet catalog For a catchbasin, the Width and Length fields inside the inlet catalog affect the structure losses hydraulically, when using the HEC-22 2nd edition headloss method. They are the inside dimensions and are taken into account in the Ko factor, which is defined as the inital headloss coefficient based on the relative junction size. The initial headloss coefficient, which is based on relative junction size, is calculated as: Where: • θ = Deflection angle between inflow and outflow pipes • b = Equivalent diameter of the structure (m, ft) • De = Equivalent diameter of the outlet pipe (m, ft) The HEC-22 2nd edition method computes a Ko term with the structure equivalent circular diameter, which means there is is a prerequisite step to convert a box vault structure into the equivalent diameter length. Please not that the new HEC-22 3rd edition junction loss method does not compute a Ko factor. Width and Length in catchbasin properties If the "Structure Type" is set to "Box Structure", then you will see additional Width and Length fields in the catchbasin properties. These represent the dimensions of the vault for reference and visual purposes - the Length field determines the size of the structure in profile view. Original Author: Mark Pachlhofer
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Forum Post: RE: SewerGEM - Modelling spill flow from one channel to another
Thanks Jesse, I have replied to your service requests # 7000672123. I remained it as dynamic wave model and tried with your suggestion to have the spill as conduit element with section type as "virtual". THe model would not computer and with message of "no valid results can be displayed". Must it run with SWMM explicit? regards. Boon
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Forum Post: RE: what is the solution for this message (in stormcad) ???
Hello Mahmoud, When you are using the inlet "On Grade" you need to provide the longitudinal slope as well for the software to calculate the flow to be capture, as its required as shown in the picture below. INLET ON GRADE IN SAG
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Forum Post: RE: SewerGEM - Modelling spill flow from one channel to another
hi Jesse, I have tried to use the explicit SWMM to compute the model. Once i changed to Explicit SWMM, the following message appear during validation: 1. Pressure junctions are treated as manholes with high surcharage 2. SWMM does not directly support channel elements. Non-prismatic channels are converted to SWMM style prismatic channels. The export sets the shape of the SWMM channel based on the start cross section if it exists, otherwise the stop cross section is used 3.IDF data is not supported by SWMM solver. The IDF storm event was not exported Could you clarify the above? Note that the side slope of most of the channel remained "zero", as in reality they are vertical wall (rectangular open channel). I have compared the simulation result between the Dynamic Wave and explicit SWMM. Runoff flows from catchments are identical. However, the flow in pipe/channel are drastically different. I Have attached a copy of the model for your comments. THe channel from H-81 to H-M8 was predicted to flood with HGL above the GL using the Dynamic WAve solver. When compute in Explicit SWMM solver, these channels does not flood anymore (see attached comparison)(Please visit the site to view this file)(Please visit the site to view this file). I can't tell where the problem was. Could you please help. Let me give you some insight to the project objective. RW1 and RW2 are a contaminated water pond which are basically a sedimentation to allow contaminants to settle. They are known to spill into the sea during storm events. However, the model does not predict they to spill event with 100 yr storm event. Could you please have a look if anything i have done incorrectly. Thank you. Rgards, Boon
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Forum Post: RE: SewerGEM - Modelling spill flow from one channel to another
on top of that, Jesse can you also have a look at the pumps for RW1 pond. It doesnot pump despite the water level in the wetwell above the switch on level.
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