Hello Sayed, The automated design tool attempts to minimize excavation. So, even though it may still be within the cover and slope constraints, increasing the slope of those pipes would result in a higher cover and excavation. See below articles for more details: Unable to meet minimum or maximum velocity constraint What is the order of the design priorities used in StormCAD (GVF-Rational solver) and SewerCAD (GVF-Convex solver)?
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Forum Post: RE: Why SewerCad Model Not Apply all Design Constraints
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Forum Post: RE: VSP Target Pressure - Pump Output Higher
Hello Andrew, VSPBs assume that a single pump in the battery turns on first and attempts to meet the target. A second, "lag" pump only turns on if the first pump cannot meet the target within the maximum relative speed factor. A third lag pump turns on if the first two together cannot meet the target within the maximum relative speed factor, and so forth. When you say that some VSPBs do not reduce speed to meet the target head, are you saying that the HGL at the target node is above the target HGL and the VSPB is operating at 1.00 relative speed factor? Is it possible that a reduction in the pump speed may not be able to cause a drop in HGL at the target node down to the target value? For example if something else downstream is causing the HGL to remain higher than the target even with the pump off. When you converted the parallel VSPs into a single VSPB, did you ensure the settings were correctly entered? Was there significant headloss in the parallel piping of the regular VSP nodes that may not be reflected in the VSPB case? In general, you want to make sure that the VSPBs have direct influence on the target node and that you don't have multiple VSPBs discharging into the same pressure some. If you have a complex model setup with logic set up too "tight", it cane become sensitive, to the point where a small change can cause relatively large changes in the results. You may want to take a close look at the Calculation Summary to see if any timesteps are unbalanced, if any use an excessive number of trials to converge and if there are any important clues in the messages tabs at the bottom such as Intra-Trial Status Messages. If this does not help, please provide your WaterGEMS/WaterCAD version number and a copy of the model file along with steps to observe the problem. You can find the version under Help > About, in the lower left corner within brackets. The latest is 08.11.06.113. There are two options for sharing your model on Communities. Either way, be sure to zip your files first. The first option is to attach to your reply on the forum using the Advanced Reply Editor (see link below and to the right of the reply box). If your data is confidential, use the instructions in the link below to send it via Bentley Sharefile. Files uploaded to Sharefile can only be viewed by Bentley. communities.bentley.com/.../7079.be-communities-secure-file-upload
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Forum Post: RE: Why SewerCad Model Not Apply all Design Constraints
Hi Jesse, It seems others have the same opinion !! and excavation should be optimized after optimizing the pipe sizes :) communities.bentley.com/.../116258 Thank you.
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Forum Post: RE: Zero Flow after PRV valve in watergems
You can also read more about the Pressure Zone Manager in the Help and in this article from our wiki: What is the pressure zone manager and what is it used for?
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Forum Post: RE: Why SewerCad Model Not Apply all Design Constraints
Hello Jesse; I think minimize excavation is OK but minimizing excavation should within the limit of velocity in design constraints and then the designer will decide about excavation manually. hope in newer version this will be changed regards Eng. Sayed Elhagar
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Comment on Bentley CulvertMaster
hola buenas tardes quisiera hacer una consulta sobre la modificacion de una seccion por ejemplo quisiera crear una seccion de alcantarilla de 1.00m x 1.00m para una material de concreto
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Comment on How do you add and use new materials, sections sizes, or culvert inlet in CulvertMaster?
como hago para crear una nueva seccion por ejemplo una seccion cuadrada de material concreto y de dimensiones 2.00m x 2.00m
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Forum Post: Configures a pump station with specific flow per hour which has been configured into Network.
Hello, I simulate a water supply system with four sources. I use Reservoir with virtual elevation and FCV ( Flow Control Valve) together to symbolize Pump Station with specific flow per hour which has been configured into Network. While I adjust elevation of a Pump Station, the FCV of the other Pump Stations appear a error namely "FCV can not deliver flow". I can't analyze the relationship between those because it's not in my knowledge right now. Could you please explain that in details? If my method above is not appropriate, please consult me what is best option in Bentley WaterGEMS to simulate a pump station with specific flow per hour which has been configured into Network. Thanks and Regards, Dang
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Forum Post: RE: Configures a pump station with specific flow per hour which has been configured into Network.
If you just want to force a known flow into the system from each source, then just make each source a negative demand. However, you will need at least one tank or reservoir somewhere in your model. How certain are you that those pump station flow are correct? Are these historical values or are they just some assumed flows?
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Forum Post: Of Your Book
Hi I have a question of your 'Advanced Water Distribution ...' book: Is Joukowsky's equation (P. 586) based on rigid or elastic method? If it is used for elastic pipes, then B is not constant, because A is not constant (B= a/[g*A]).During the transient (In elastic method), A is changed to A+dA and it can not be constant. M.
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Forum Post: RE: Configures a pump station with specific flow per hour which has been configured into Network.
Hello Dr.Tom My purpose is that I am using historical values to construct model to guess behavior of system. Output flow are collected from historical values of a represented day. In WaterGEMs model, I want to control the flow from each Station as historical records. Thanks, Dang
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Forum Post: Resonance in two surge tank systems
Hello, I have been modelling a few hydro power schemes in Hammer which have two surge tanks, one for the HRT and one for the TRT. One Indian code IS:7396 (part-2)- 1985 gives some conditions to be fulfilled for the stability of the two surge tank systems so as to avoid resonance between the oscillations of the two. Does hammer take into account this phenomenon of resonance if the surge tank sizes are so chosen that they (areas) lie in the zone of possible resonance as per the above code. Can you please provide me with some more information on the aspect of resonance in hydropower schemes with multiple surge tanks? Reg Amit
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Forum Post: WaterCAD Trex produces too large values - how to fix?
Hello, For my assignment I have two .dxf files: pipes and junctions and elevation data as points. I have successfully used modelmaker to draw the pipes and junctions. I can also add the elevation data as a background layer or additional junctions. The problem before discovering Trex was that the junctions between the pipes have no elevation data in themselves. In my understanding Trex should solve this problem by using elevationdata.dxf points to interpolate an elevation raster and then apply that elevation to the junctions according to their location. Correct me if I have understood it wrong. As I run Trex, I'm doing as the WaterCAD manual instructs me. This produces elevation data between 300 meters (984 ft) and 180 000 meters (590 551 ft). The correct data that I can read from the elevation data backround layer is between 60 meters (196 ft) and 120 meters (394 ft). I'm not sure what happens but Trex calculates the terrain in a way I do not understand. I could of course insert the elevation data for the junction between the pipes manually by reading the data from an adjacent point in the background layer and typing it up into the junction's properties. However, I have close to 1000 junctions; I'm not patient enough. Also I wish to learn how to use this software in an efficient way. I'm a student in a Finnish University so please bear with any grammar mistakes I might have made or my general cluelessness about the software. Thank you for reading through this post!
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Blog Post: Creating Custom Calculated Results with Formula User Data Extensions
Part of the Hydraulics and Hydrology Video Series ( more info ) Have you ever wished that a certain result field was available? Have you ever wanted to add your own attribute in addition to the other available attributes for your elements? Did you know that User Data Extensions can extend the available attributes of your model elements, including attributes whose value is derived from a formula? To learn more, watch this short video that explains how. The video covers the User Data Extensions dialog and Formula entry window for formula-derived User Data Extensions (Please visit the site to view this video) Applicable products/versions: WaterCAD, WaterGEMS, HAMMER, SewerCAD, SewerGEMS, CivilStorm, StormCAD - SELECTseries 2 and higher This video is part of a growing library of useful information designed to provide effective tips and information about time-saving product features within Bentley’s Hydraulics and Hydrology products. Be sure to check back frequently to view the latest video. Better yet, subscribe to this blog by turning Notifications On. Craig Calvin, Technical Support Engineer Bentley Systems, Inc. See Also Advanced Water Distribution Modeling and Management Creating Formula-based User Data Extensions How do you create an if...then...else conditional statement using the Real(formula) type for a user data extension?
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Wiki Page: WaterGEMS/HAMMER/SewerGEMS toolbars are not available in ArcGIS integrated mode
Applies To Product(s): Bentley WaterGEMS, Bentley SewerGEMS, Bentley HAMMER Version(s): 08.11.XX.XX Environment: N/A Area: Original Author: Mark Pachlhofer and Scott Kampa, Bentley Technical Support Group Problem I've integrated WaterGEMS with ArcGIS and I have the correct versions, but I don't see the WaterGEMS menu. Why? Steps to Resolve In ArcMap, right click in the gray area at the top-right corner. You should see several WaterGEMS entries available to add as toolbars. At a minimum, make sure the "WaterGEMS layout toolbar" is selected. (Please visit the site to view this video) If you do not see the WaterGEMS menus or if some of them are missing, see the steps below, which should help with the issue. 1) First, make sure the version of WaterGEMS you have is compatible with ArcGIS. A compatibility chart can be found at the following link: http://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/3407.aspx 2) If you are working with compatible versions of WaterGEMS and ArcGIS, there may be an issue with the program installation or the integration. First, with ArcMap and WaterGEMS closed, run the " Integrate ..." shortcut within the WaterGEMS start menu folder and try again. Note that you may need to have elevated permissions (such as Administrator privileges) in order to successfully use this Integrator tool. If you encounter a problem running the Integrator tool, try right clicking the shortcut > Properties > Compatibility and check the box for "Run this program as administrator ". Related to this, you can also go to "C:\Programs Files (x86)\Bentley\(product name)\Haestad.Integrator.exe". Then right-click on this file and choose "Run as Administrator". Make sure that you do this from a user account that has full administrative rights, and make sure the product and ArcGIS are closed. 3) If that doesn't help, go to Control Panel and choose Programs and Features (for Windows 7) or Add/Remove Programs (or Windows XP). Find Bentley WaterGEMS in the list, highlight it, and select Repair . This will reinstall key components and rerun the integration tool. Once this is completely, you may need to restart your computer. However, once it is completely, the issue should be resolved. If it doesn't work, try a clean reinstallation of the program using these instructions . When you reinstall, the integration should happen automatically. * Note that you need full administrative rights to install the program correctly . 4) If you are using ArcGIS 10.3 please make sure to follow these instructions in order to achieve full integration . 5) When this is completed use the steps in the video again to locate the toolbars. 6) If that doesn't work the ArcGIS.exe.Config file might be corrupted. In that case you should try the following: a) Backup the ArcGIS.exe.Config file on the user's system, which is located at "C:\Program Files (x86)\ArcGIS\Desktop10.2\bin". b) Replace the ArcMap.Exe.Config file with this one c) Rerun the WaterGEMS integrator to integrate the product. If that doesn't resolve the issue, please submit your question on the Forum or contact Bentley Technical Support. See Also WaterGEMS for ArcGIS FAQ SewerGEMS for ArcGIS FAQ
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Forum Post: RE: WaterCAD Trex produces too large values - how to fix?
Hello Juho, You are correct in how TRex should be working. It will take data from an elevation data file and apply elevation data based on the data in the file. You can find additional information on TRex at the following link: communities.bentley.com/.../8281.trex-terrain-extractor-tool You may want to confirm that the data in the DXF file is accurate. TRex will pull data from an elevation data file and apply it to the model. It would not include elevations of 180,000 meters unless the contour data includes that data. If the DXF file has other data or incorrect data, that might account for the issue. One other thing you can do is temporarily add the elevation data DXF file as a background layer. By doing this, you can confirm that the DXF file follows the same general coordinates. If that doesn't help, we may need to see a copy of the model files, as well as the elevation data file. There are two options for sharing your model on Communities, whichever you choose please be sure to zip your files first. The first option is to attach the zip file containing your model to your reply on the forum using the Advanced Reply Editor (you'll find the link below and to the right of the reply box). If your data is confidential please use the instructions in the link below to send it via Bentley Sharefile. Files uploaded to Sharefile can only be viewed by Bentley employees. communities.bentley.com/.../7079.be-communities-secure-file-upload If you upload the file to Sharefile, please post here with the name of the file so that we know it is available. Regards, Scott
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Forum Post: RE: VSP Target Pressure - Pump Output Higher
In case anyone is looking for information about how VSPB's work in the future you can find a wiki article located here: communities.bentley.com/.../27039.how-do-variable-speed-pump-batteries-work Mark
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Wiki Page: What is the meaning of the notification "Valve cannot deliver flow", with regards to a Flow Control Valve (FCV)?
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD Version(s): 08.11.XX.XX Environment: N/A Area: Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem What is the meaning of the notification "Valve cannot deliver flow", with regards to a Flow Control Valve (FCV)? Solution This simply means that the flow through the valve is less than the setting that you entered, so it is inactive. Note that a FCV does not set the flow; it limits it. If the flow through it is showing up as greater than the setting, then this could mean that the orientation of the valve is incorrect. Check the "downstream pipe" property of the FCV. This is due to the flow reported at the valve having a negative sign in front of it - an FCV will not limit negative flow, even though this just refers to the direction of flow.
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Forum Post: RE: VSP Target Pressure - Pump Output Higher
Hi Jesse, thank you for the response. I've uploaded the current version of the model to demonstrate the issue. The pump battery named "East Park Dr" is the most prominent pump that does not reduce speed to meet target head. Let's discuss that pump first... Thanks, Andrew
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Forum Post: RE: Resonance in two surge tank systems
Hello Amits, How large are your surge tanks? Can you clarify what is meant by "resonance"? If this refers to the cyclical filling and draining of the tanks due to wave reflection during a transient event, HAMMER can certainly model this. You can track the water level inside the surge tanks per the article below: communities.bentley.com/.../19665.how-can-i-see-the-amount-of-inflow-or-outflow-occuring-for-a-particular-surge-tank-during-the-transient-simulation-in-hammer-solution-500000060226 If this "resonance" refers to something else, please elaborate.
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