(Please visit the site to view this file) Hi Jesse, I do remember this case in Storm and Mal was in the discussion, I am talking about SewerCAD and my concern is slightly different; I guess up-sizing the pipe should be done after two parameter I have mentioned in my post. I attached the model; even I am talking about any model because that happened in all new design projects, the function should be more aggressive to optimize the sizing. Thank you .... Mohamad
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Forum Post: RE: Changing Diameter in Auto-Design
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Wiki Page: How can I set up pre and post development scenarios for use in pond design with PondMaker?
Applies To Product(s): Bentley CivilStorm, Bentley SewerGEMS Version(s): 08.11.XX.XX Environment: N/A Area: Original Author: Sushma Choure, Bentley Technical Support Group Problem How can I set up pre-development and post-development scenarios for use in pond design with PondMaker? Background I want to design the pond using the tool PondMaker, for that I need to setup the model for pre-development conditions and post-development conditions. I need to use the scenarios to set this up. Solution Create New Pre/Post-Development Scenarios Dialog This dialog allows you to quickly create scenarios alternatives for pre- and post-development conditions. This dialogue pops up in CivilStorm if you are creating a new model, for SewerGEMS you can access it through Analysis > scenarios > New button > New Pre/post scenarios. The dialog consists of the following controls: Scenario Creation Type: This menu contains the following options: Pre and Post-Development: This option will create both pre and postdevelopment scenarios and associated alternatives. Pre-Development Only: This option will create only predevelopment scenarios and associated alternatives. Post-Development Only: This option will create only postdevelopment scenarios and associated alternatives. Pre-Development Label Prefix: This field allows you to define the prefix label that will be assigned to all of the predevelopment scenarios and alternatives that are created by this wizard. Post-Development Label Prefix: This field allows you to define the prefix label that will be assigned to all of the postdevelopment scenarios and alternatives that are created by this wizard. Return Event Label: This list allows you to define any number of return event labels. Click the New button to add a new row; click the Delete button to remove the row that is currently highlighted. The return event labels are used as the suffix for the predevelopment and postdevelopment scenarios (one predevelopment and one postdevelopment scenario is created for each label in this table), and as the alternative label for the rainfall runoff alternatives (one rainfall runoff alternative is created for each label in this table). Click the Create button to generate the specified scenarios and alternatives; click Cancel to close the dialog without creating scenarios or alternatives. Example Based on the following parameters: The following scenarios will be created: And the following alternatives will be created: Creating Your Pre-Development Network You need to create a Pre-Development network so you can calculate your target peak runoff flows for use in the Post-Development environment. Create you network, which may contain, catchments, catch basins, conduits, manholes etc. Add an outfall to the network. Connect the elements to the outfall. Here is an example of that. 4.Click the File menu and select Save. Creating Your Post-Development Network You need to create a Post-Development network that represents the situation for which you have to design your detention and/or retention ponds and outlet structures. To model the elements that will be used in the Post-Development scenarios but aren't used in the Pre-Development ones we will use the active topology feature. Active topology allows you to make an element or elements inactive in one or more scenarios. When an element is inactive, it has no effect on the model calculations. Change the currently active scenario to Post-Development 2 using the Active Scenario menu. Lay out a pond element between the catchment and the outfall. (You can move the existing elements around to make room if necessary by dragging them to the desired location.) 3.Click the Layout button and select Pond Outlet from the submenu. 4.Click to place the pond outlet somewhere inside the borders of the pond. Click on the outfall O-1 to connect the pond outlet to the outfall, then right-click and select Done. 5.Highlight the catchment CM-1 and change the Outflow Node property to pond PO-1. 6.Now the Post-Development network is laid out. Change the Active Scenario to Post-Development 25. Note that the changes you made to the Post-Development 2 scenario have been inherited by the Post-Development 25 scenario. 7.Change the Active Scenario to Pre-Development 2. Note that the pond and the pond outlet are greyed out; this indicates that these elements are inactive in the current scenario, and will have no effect on the calculations. 8.Save the project. 9. Next, select the Post-development scenario as the active scenario and use PondMaker to design the pond. See Also Scenario and alternative management Using PondMaker
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Forum Post: Question from Your Book: 'Advanced Water Distribution Modeling ...'
Hi I have a question of your book (P.580): Characteristic Wave Celerity was calculated from (modulus of elasticity/density)^0.5 under 'The Elastic Model' (P. 579). This equation is for rigid pipes which A2-A1 in them is zero. How this can be justified?
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Forum Post: RE: SewerGEMS export to SWMM
Hi Scott Just a further question on this topic. When I have pattern loads and fixed loads at a node, it exports it to SWMM's "Direct" inflows (Pattern loads as a baseline with pattern and Fixed flows as a Time series) , but when I only have a fixed load, it exports it to the "Dry weather" flow. Why does it not export the fixed load to the Direct flows as a Time series flow in this case?
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Forum Post: RE: Transients in downstream Surge Tank and TRT for a Hydropower scheme
Hello Jesse, I have tried to upload three files through secure file upload. Theere are two zip files for load rejection- 1st with equivalent orifice dia introduced in Surgetank; and the 2nd with individual "orifice between pipes" in each pipes connecting the surge tank with TRTs. The third file is for load acceptance case. I hope the files have been uploaded successfully. Why I have uploaded the three files is because in the load acceptance case, there is a head drop accross the "orifice between pipes" which is absent in the load rejection case 2nd. Thats why I had to model load rejection case 1st. pl. note that the above model is for a similar project but not the same as the one for which i have sent you the drawings. So pl. dont corelate the model with the drawings.
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Wiki Page: Opening a product as a 32 bit product
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER, Bentley SewerGEMS, Bentley SewerCAD, Bentley StormCAD, Bentley CivilStorm Version(s): 08.11.04.XX Environment: Windows 64 bit Area: Subarea: Original Author: Akshaya Niraula, Bentley Technical Support Group The method below will help to open the 32 bit version of a Haestad product. Background Sometime it is required to open up certain product that is targeted for certain architecture (bit). In that case, please follow the steps below. Steps to Accomplish The 32 bit applications of H&H products are generally installed at: "C:\ Program Files (x86)\Bentley\ProductName\ ". At this location, there will be an exe for the main program such as WaterGEMS.exe or SewerGEMS.exe. Simply double click the main executable file to open it and then a 32 product will be opened. See Also Opening a product as a 64 bit product .
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Forum Post: RE: Transients in downstream Surge Tank and TRT for a Hydropower scheme
Hello - unfortunately the files do not appear to be uploaded. Can you place them in a single zip file and try again? It would also be useful to have answers to the questions from my previous reply.
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Forum Post: RE: Question from Your Book: 'Advanced Water Distribution Modeling ...'
I'm not sure I fully understand your question. I think the answer is that this equation does not apply to rigid theory since it is basically 0/0. Wave speed is essentially infinite for incompressible, inelastic conditions.
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Forum Post: RE: Question from Your Book: 'Advanced Water Distribution Modeling ...'
You may want to check out page 586 which covers the Korteweg equation for wave speed. This equation considers pipeline elasticity and liquid compressibility. This is the same equation used in Bentley HAMMER's wave speed calculator tool.
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Wiki Page: Equation used in Wave Speed Calculator tool
Product(s): Bentley HAMMER Version(s): 08.11.XX.XX Environment: N\A Area: Calculations Problem What equation does HAMMER use to calculate Wave Speed in the Wave Speed Calculator Tool? Solution HAMMER uses the equation developed by Korteweg. See page 586 of Advanced Water Distribution Modeling and Management . Where: a = Wave speed (ft/s, m/s) Ev = Bulk modulus of Elasticity (lbf/ft^2, Pa) p = liquid density (slugs/ft^3, kg/m^3) D = Diameter (in, mm) e = wall thickness (in, mm) E = Young's Modulus (lbf/ft^2 / Pa) ψ = pipeline support factor See Also Advanced Water Distribution Modeling and Management .
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Forum Post: RE: Question from Your Book: 'Advanced Water Distribution Modeling ...'
Also see below article: communities.bentley.com/.../26821.equation-used-in-wave-speed-calculator-tool
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Forum Post: RE: Can Pondpack V8 run Snyder's method?
PondPack directly supports the SCS Unit Hydrograph and Santa Barbara Unit Hydrograph methods, as seen in the "Unit Hydrograph Method" dropdown in the properties of a catchment. There is also a "Generic Unit Hydrograph" option, where you can define a custom unit hydrograph. Since the Synder method appears to be a synthetic unit hydrograph, it is possible you may want to specify it as a custom SCS dimensionless unit hydrograph. Here is a screenshot showing the setup in PondPack. I used the included Delmarva dimensionless unit hydrograph just as an example. However, this of course assumes that the method can still utilize the underlying SCS Unit Hydrograph methodology. If the Snyder Method has differences beyond the unit hydrograph used, another option would be to compute the overall runoff hydrographs separately and insert them into PondPack as User Defined hydrographs (User Defined Hydrograph as the Runoff Method). Note that Synder and S-curve are directly supported in HEC-HMS.
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Forum Post: RE: SewerGEMS export to SWMM
Hello Rossouw, I just tested this in a sample model. In the sample, I had a sanitary loading based on a pattern and a fixed wet weather inflow. In that case, the export is combining the loads into a single load. There is a time series that includes the fixed load from the wet weather loading and the pattern flow for the sanitary loading. If the pattern loading was not present and there was only the fixed wet weather inflow, the flow in SWMM V5 would appear as a baseline flow under the Direct tab for the inflows at the element. If you are seeing something different, I will need more information for how your loading appears in SewerGEMS. It is possible that I am looking at a different loading setup. A screenshot of the loading and any patterns you are using would be useful. Regards, Scott
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Wiki Page: Error in ModelBuilder: Unable to open table
Applies To Product(s): Bentley SewerCAD, Bentley SewerGEMS, Bentley StormCAD, Bentley CivilStorm, Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER Version(s): 08.11.xx.xx Environment: N\A Area: Modeling Subarea: N\A Original Author: Scott Kampa, Bentley Technical Support Group Error or Warning Message Error when importing an Excel spreadsheet, Access database, or Geodatabase with ModelBuilder, the following error message is generated: "Unable to open table #####" How to Avoid This can occur when there are duplicate items being used in the Key Field of ModelBuilder. Make sure that the item used in the Key Field are unique. If there is no unique field, there will be a field called " " in ModelBuilder. This is generated by the program and can be used as the Key Field as needed. Note that you will not be able to sync data back to the source file if you use " " as the Key Field, since this is field not available in the source file itself. In addition, check the source file for bad data, such as pipe lengths that are listed as being zero. See Also Building a model using ModelBuilder
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Wiki Page: In the inlet library what is the 'design lengths' used for?
Applies To Product(s): Bentley SewerGEMS, Bentley CivilStorm, Bentley StormCAD, Bentley SewerCAD Version(s): 08.11.XX.XX Environment: N/A Area: Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem In the inlet library what is the 'design lengths' used for? What do you enter in the 'design lengths' are if there is already a default grate length, default curb opening length, and structure length? Solution The 'design lengths' is the used when you are running a design scenario to design pipe inverts, design inlet openings, desired sump depths, etc... When the software is set to run in this way, which is setup in the calculation options and using the default design constraints, it will look at the different lengths that you have listed under the design lengths for a particular inlet and choose the one that best suits the network See Also Troubleshooting Automated Design Result What is the order of design priorities used in the StormCAD and SewerCAD?
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Forum Post: Trex elevation import
Hello, I am attempting to add elevation information to a model and I have been running into the "All elements fall outside the scope of the DEM" error. I have searched through the forums for solutions and it appears that I have a different issue than other users. I am new to ArcMap and StormCad, so it may be a simple error. The elevation is stored in a contour shape file that was created from a USGS raster. Both my model and shape file appear to be in the same coordinate system and projection. I have verified this through ArcMap and by importing the shapefiles as background layers to check overlay. I am using StormCAD V8i (08.11.05.58). I appreciate any direction that you may provide and I will try to upload a zipped sample project as "elevationtest.zip."
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Forum Post: RE: Trex elevation import
Here is the file. I also forgot to add that my version is SELECTseries 5. (Please visit the site to view this file)
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Forum Post: RE: Trex elevation import
Hi Pieter, After looking at your model I see there are no nodes (manholes, catch basins, transitions, taps, cross sections, outfalls, etc...) in your model to add elevations to. What you'll need to do is first add those and then you can use TREX in order to add in the elevations. Regards, Mark
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Forum Post: RE: Changing Diameter in Auto-Design
Hi Mohamad, From the help article "Automatic Design": In general, the design algorithm attempts to minimize excavation, which is typically the most expensive part of installing sewer piping and structures. Are you requesting that minimizing pipe diameter has a higher design priority than minimizing cover? If so, I will submit a feature request on your behalf.
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Forum Post: RE: Question from Your Book: 'Advanced Water Distribution Modeling ...'
Hi Let me ask in another way: What is difference between equations P. 586 & P. 580 (Calculating a)?
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