Dang, This wiki article will explain the meaning behind what the user notification about the FCV not being able to deliver flow means: communities.bentley.com/.../23115.what-is-the-meaning-of-the-notification-valve-cannot-deliver-flow-with-regards-to-a-flow-control-valve-fcv The user notification 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. In thinking about your problem the only way that I can think of how you'd get the FCV not being able to deliver the flow notification is if the demands downstream of the FCV are less than the flow setting of your FCV. For example, if your FCV is set to an initial flow setting of 30 gpm and your demand downstream is 20 gpm then you'd get that user notification no matter what elevation your reservoir is set at. The only thing that I see that might happen if you lower your reservoir is the pressures at your downstream nodes would be lower. Tom's suggestion should work to do what you're looking to do though, or you could just ignore the user notification because it's a yellow notification, which just indicates an informational warning. Regards, Mark
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Forum Post: RE: Configures a pump station with specific flow per hour which has been configured into Network.
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Wiki Page: Distributing a lump sum demand over a large area
Applies To Product(s): Bentley WaterCAD, WaterGEMS Version(s): 08.11.xx.xx Environment: N/A Area: Layout and Data Input Subarea: Original Author: Jesse Dringoli, Bentley Systems, Inc. Problem How can you distribute a lump sum demand over a large area? Problem # 54617 Solution To distribute this demand over the model, one approach would be to use the Loadbuilder tool. Loadbuilder has several different methods of distributing demand information over the nodes in your model, based on spatial information. For example, you could use the Proportional Distribution by area method. With this method, you could first generate a Thiessen polygon (using the Thiessen Polygon tool) to create polygon areas representing each junction in the model (service areas). Loadbuilder would then overlay the lump sum demand polygon shapefile that you have with the service areas and distribute the demand to each node based on the overlapping areas. You can read more about Loadbuilder in the help documentation. Alternatively, if you don't have spatial information (polygon(s)) for this demand and just know the total demand amount, you can divide it by the number of nodes in the model to find the demand per node, then use the "Initialize demands for all elements" option in the Demand Control Center (located under the Tools menu). This would create a single demand entry for every element, with the same demand amount. This would be the least accurate way to distribute the demand.
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Wiki Page: "Relative Speed Factor (Calculated)" remains 1 even when the pump if off... (Solution 500000092132)
Product(s): Bentley SewerCAD Version(s): 08.11.02.75 Environment: N\A Area: Calculations Subarea: N\A Problem When viewing the results for "Relative Speed Factor (Calculated)", the calculated results remain "1" even when the pump is off. Area: Modeling, Problem ID#: 77074 Solution This is a reporting glitch that may be the database or report/output files. If this occurs for a pump that is initially off, try setting the initial relative speed factor to "0" and recomputing the model. Otherwise, contact Bentley Technical Support.
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Forum Post: Introducing the Hydraulics and Hydrology Video Series
As a user of Bentley’s Hydraulics and Hydrology (H&H) products, you’re likely familiar with their powerful core functionality. However, there are many other features and tools that you might not know about that could help save you time and be more productive. Our new Hydraulics and Hydrology Video Series aims to help bridge this gap by providing you with short video clips that show you how to take advantage of these things. Here is an overview of what has been posted so far: Navigation and Data Entry Quick Tips - In our first post, I show you some handy tips to keep in mind with commonly used features like the Properties Grid. Using Profile Animation to Better Understand Transient Results in HAMMER - Scott Kampa shows HAMMER users how to look at animated transient results to help understand complex interactions that occur during a transient simulation. Better Model Management with Active Topology - Mark Pachlhofer shows you how to set up different topological scenarios (such as existing vs. future) in a single model file with Scenarios and Active topology. Using Network Navigator's Powerful Queries - Sushma Choure shows you how to use Network Navigator queries to help locate and select elements to assist in tasks such as post-model building cleanup. Creating Custom Calculated Results with Formula User Data Extensions - Craig Calvin shows you how to use Formula-Derived user data extensions to extend the reporting capabilities of your model. We plan to provide regular updates, on an every-other-week basis. If you’re a regular user of our H&H products and are interested in this series, subscribe to the Hydraulics and Hydrology Blog! Have a topic suggestion? We’d love to hear from you. Happy modeling! Jesse Dringoli Manager, Technical Support Bentley Systems, Inc.
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Wiki Page: Updating Source File Using Model Builder [TN]
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD, Bentley SewerGEMS, Bentley SewerCAD, Bentley StormCAD, Bentley CivilStorm, Bentley HAMMER Version(s): V8i Environment: N/A Area: N/A Subarea: N/A Original Author: Akshaya Niraula, Bentley Technical Support Group Overview It's always a huge challenge to maintain the synchronization between the source file and the Model. With the latest release of V8i, the powerful ModelBuilder got even powerful and now we can update the source file also. This is continuation of the " Building A Model Using Model Builder " and " Updating A Model Using Model Builder " however it can be used independently. These steps can be followed in several modeling software applications like, WaterGEMS, WaterCAD, SewerGEMS etc. The procedure described below uses GeoDataBase as an original source of modeling information and WaterGEMS as a modeling software. Mantra, when updating source file, "The Hydraulic model is now source file and the GIS data is the target" Let's assume the Hydraulic model got updated. An existing pipe got tapped in two places and a new loop of 8" pipe is established. With this update the ModelBuilder should do the following to the source file: 1) Split the existing pipe in two places (Meaning, create new features in source file) 2) Update the pipe attributes (Meaning, update the pipe information in source file) Preview of Source File Symbology has been applied to the modeling elements to better illustrate the updates. Following image will show the population of the Unique ID in Pipe Table. Updating Source File Using ModelBuilder The steps described here will help to update the source file. This example updates the GeoDataBase source file however; any type of source file that was used to build the model can be updated. Before updating the source file directly it is recommended to make a back up copy of the source file that's planned to update by ModelBuilder. Open ModelBuilder Tools > ModelBuilder ModelBuilder, as shown below, will show up. Let's assume a worst case scenario that the existing link got deleted or file name /path got updated. If filename/path is the same, the existing link can be double clicked. Specify your Data Source The "Specify your Data Source" will show up. First select the Data Source type and then ‘Browse' for the source file, as shown. If the existing link on ModelBuilder is double clicked, there should not be any warning messages and/or the missing Tables. In this step, - source data can be selected - tables/ layers can be selected/ deselected - SQL query can be applied to filter the table if required - source table can be previewed When "Show Preview" box is checked, only highlighted Table will be displayed. Remember, if existing link is double clicked then the changes should be seen in the preview. If the changes are not there, start new model builder by clicking on "New" button on the first screen of ModelBuilder. Click Next. Specify Spatial and Connectivity Options Depending upon the source file (Hydraulic Model elements) this screen may look different. In this step, first provide the unit of your Source Data. If not sure try with "ft". Note: Source file does not have any Junction attributes. Click Next. Specify Element Create/Remove/Update Options Depending upon the requirement the selection of options may vary. For this particular example following options are selected. Note: For detail information, press F1 and help file will be launched. Click Next. Specify Additional Options This step is particularly important if the source file has Unique ID. In this workflow, the Unique ID is maintained in "Label" field of the model so; the "Label" is selected in "Specify key field". If Source file has different Unique field then "GIS-ID" needs be selected. If there is no unique field in the source file then select "Label". If the Unique ID field in source file name is say "WXYZ" then field "WXYZ" must be present in the Hydraulic Model. (User Data Extension from Tools menu is used to create "Custom" fields in Flex Table.) When new elements are created, Unique ID field (or WXYZ) will not be populated. As ModelBuilder will look for Unique ID under WXYZ field to update/create the new elements in source file, this Unique ID (WXYZ) must be populated with unique ID otherwise no new fields will be created. Click Next. Specify Field mappings for each Table/Feature Class If the existing link had been double clicked then everything in this step should be good. If a new button had been clicked then all the necessary elements and the fields need to be mapped. Follow the " Specify Field mappings for each Table/Feature Class " from " Create A Model Using ModelBuilder" and come back to this step. Click Next. Create Model Now? Select "No" and click on "Finish". Click Finish. Sync Out Select the link that was just updated/used and click Sync Out. Finally the screen should look like below with all the updates and new features as per the Hydraulic Model in the Source File. This concludes the updating of the source file process using ModelBuilder. See Also Updating A Model Using Model Builder Building A Model Using Model Builder Product TechNotes and FAQs Haestad Methods Product Tech Notes And FAQs WaterGEMS V8 Modeling FAQ Hydraulics and Hydrology Forum External Links Bentley SELECTservices Bentley LEARN Server
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Wiki Page: Benefits of using variable speed pump batteries (VSPB) element and how it works
Applies To Product(s): Bentley WaterGEMS, Bentley HAMMER, Bentley WaterCAD Version(s): 08.11.XX.XX Environment: N/A Area: Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem What are the benefits of using variable speed pump batteries (VSPB) element and how it works? Solution Saves time The VSPB element gives you the ability to model multiple pumps that would otherwise be modeled as parallel variable speed pumps (that use the same pump definition and target nodes) in one element. It saves you time to use this element vs. laying out and inputting pump information for multiple pumps. Function The VSPB allows you to enter one pump definition that applies to all the pumps that are defined in the properties. There is one lead pump and you input the number of lag pumps in the properties that turn on automatically when the lead pump is not able to meet the target head or target flow while maintaining a relative speed factor that is below the maximum defined in the properties (default is 1.00 or 100% of the max operating speed). When a lag pump is triggered both it and the lead will run at the same relative speed factor. This process will occur every time a lead and/or lag pump cannot meet the desired head or flow while maintaining a relative speed factor below the maximum. See Also Forum post
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Forum Post: RE: Joukowsky's equation - Rigid or Elastic
Because dA << A, A +dA = A for all practical purposes. You seem to want to dig deeply into transients. If you want to get farther into the subject of transients, I suggest you get a book with the derivations such as Wylie and Streeter, Fluid Transients in Systems Chaudhry, Applied Hydraulic Tranisents
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Wiki Page: Opening old WaterCAD models in WaterCAD or WaterGEMS V8 [VID]
Applies To Product(s): Haestad Products Version(s): XM, V8i Environment: N/A Area: N/A Subarea: N/A Original Author: Bentley Technical Support Group Overview This video demonstrates how to open older WaterCAD or WaterGEMS models in V8 XM or V8i. Support Video Clip (Please visit the site to view this video) See Also Product TechNotes and FAQs Haestad Methods Product Tech Notes And FAQs Hydraulics and Hydrology Forum
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Forum Post: RE: How do I (re-)display customer meter assignments?
Try closing the program, navigate to the folder where the model is saved, locate and delete the file with extension .WTG.DWH. This stores information about how the drawing pane is rendered. Reopen the model from the .WTG file and it should re-draw the model and hopefully bring back the dashed line "decorations". If not, please upload a copy of the model files. There are two options for sharing your model on Communities. Either way, be sure to zip your files first (in this case it would be best to include all the files with the same base file name as your model). 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: How do I (re-)display customer meter assignments?
This did the trick. Thanks, kindly! Perhaps this solution should be added to the first link supplied by Mark above.
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Forum Post: RE: How do I (re-)display customer meter assignments?
Great! I agree; we'll be sure to do that.
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Forum Post: RE: StormCAD
Please provide your model files. 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. If you upload the file to Sharefile, please post here with the name of the file so that we know it is available.
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Wiki Page: Element Symbology labels are not displaying or drawing correctly. (Solution 500000087933)
Product(s): Bentley WaterGEMS Version(s): 08.11.XX.XX+ Environment: N\A Area: Output and Reporting Subarea: N\A Problem The labels created in Element Symbology are not displayed on the drawing correctly. Is there a way to fix this? Product: WaterGEMS V8i Version: 08.11.03.17 Problem ID#: 70821 Solution First, try to refresh the drawing by going to View > Refresh Drawing. If this doesn't work, synchronize the drawing with information in the database by going to Tools > Database Utilities > Synchronize Drawing. If the labels still do no appear, try changing the Drawing Style in Element Symbology. In large models, labels set to CAD style will be very small. If you change the drawing style to GIS, the labels may appear. You can also try refreshing the element symbology manager window in the standalone version of the software using the following icon in the screen shot below: If the above doesn't work try these steps: 1) Close the software 2) Browse to the folder where the model is saved 3) Locate and delete the file with the .WTG.DWH extension (This file stores information about how the drawing pane is rendered) 4) Reopen the model and it should re-draw the model and the dashed line "decorations".
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Wiki Page: Modeling variable speed pumps in parallel with different pump curves (Solution 500000100851)
Applies To Product(s): Bentley WaterCAD, Bentley WaterGEMS, Bentley HAMMER Version(s): 08.11.XX.XX Environment: N\A Area: Modeling Subarea: N\A Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem I have multiple variable speed pumps in parallel, but some of them have different pump curves. This is the way they are in the field. How do you model that? Area: Modeling, Problem ID#: 89805, GENERALINFORMATION See Also: VFD, VSD, VSP, Variable speed pump, Variable speed drive, Variable fixed drive, pump Solution Because of the constraints for VSPs there are only two options: 1) If the pump curves are close enough to each other then you can approximate an "average" pump curve for all the pumps so you model them in parallel as VSP's. 2) Model the pumps that have the same pump curve as VSP's and then model the other pumps that don't have the same pump curves as regular pumps that have all the necessary controls on them to make them act like VSP's. For more information on parallel variable speed pumps, please see the Help topic in WaterGEMS or WaterCAD called "Parallel VSPs".
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Wiki Page: VSP or VSPB not properly maintaining target HGL
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER Version(s): 08.11.XX.XX Environment: N/A Area: Modeling Subarea: Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem I have a fixed head variable speed pump or variable speed pump battery (VSPB) that is not able to achieve the target hydraulic grade at the target junction, or it stays on at full speed despite the HGL being above the target (it is not ramping down to meet the target) What might be happening and how can I fix it? Reason One possible cause is when there are two or more VSP stations or VSPBs (with different target nodes and target HGL) serving the same presssure zone. Both pumps may be set to an inital status of 'On'. As our Help documentation mentions, there should only be a single VSP serving a given pressure zone. What happens is the VSPs essentially "fight" with each other. In many cases this causes an error to result, but in other cases the model converges, but has to settle on a solution where there is an energy balance for the network and the demands are fully satisfied. Basically, behind the scenes what is happening is one pump is trying to meet the fixed head you assigned to it. Then as that happens the other pump is also trying to meet the fixed head you assigned to it. At this time the calculation engine is trying to balance the energy in the model and meet all the demands as well, so it goes through a few iterations until it stops at some number of trials, where it has converged on a solution that may requires the VSP's to run in "fixed speed override" (full speed, with a relative speed factor of 1.00) in order to have an energy balance. This fighting of the two VSP's in the model to try to maintain their fixed head setting creates hydraulic conditions that are impossible to maintain. It is also possible that a VSP cannot ramp down its speed to meet the target if other elements in the pressure zone already maintain the HGL above the target. For example there may be another pump (even a non-VSP), tank or reservoir that can keep the HGL above the target if the pump in question tries to ramp down. One thing you can do to test this is to run a steady state simulation with the variable speed option turned off on the pump in question, then set the initial speed to something lower and see the effect on the target node. You may find that the pump is not able to pass any flow at lower relative speed factors and the HGL at the target node is still above the setting. Solution The issue can be resolved by avoiding multiple variable speed pumps or variable speed pump batteries discharging to the same pressure zone. You may need to set all but one of the pumps' initial status to 'Off', and check to make sure that all related data input is correct. If you really do have multiple variable speed pump stations discharging to the same pressure zone, with different target nodes and target HGL, you may need to set them all to regular pump elements with the variable speed control variable set to "pattern", then manually define the pattern of relative speed factor over time.
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Forum Post: RE: How do I (re-)display customer meter assignments?
Jonathan, The solution was added to the wiki. Regards, Mark
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Wiki Page: How does the Unit Line LoadBuilder method work?
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD Version(s): 08.11.xx.xx Environment: N\A Area: Layout and Data Input Subarea: N\A Original Author: Scott Kampa, Bentley Technical Support Group How To How does the Unit Line LoadBuilder method work? Steps to Accomplish The Unit Line method on LoadBuilder divides the total demand in the system (or in a section of the system) into 2 parts: known demand (metered) and unknown demand (leakage and unmeasured user demand). The known demands are included from existing Demand alternatives in the model. Unknown demand from leakage or unmeasured user demand are accounted for by the coefficient, K. If there are no users on either side of the pipe (the pipe is only used to transfer water to another part of the system), then K is 0. If there are users along only one side of the pipe (for example, pipes along a river), K is 0.5. If both sides of the pipe supply water to users, K is 1. The unknown demand is entered in a table in LoadBuilder. Details on the methodology and theory can be found in the Help topic "Unit Line Method". The following screenshot shows LoadBuilder using the Unit Line method: The "Include known demands in results" allow the user to retain demands that are already in a given demand alternative. By selecting this option the user can choose a Demand alternative from the dropdown menu. The "K-factor field" select allows the user to define how unknown demands are accounted for in the model. See above for general information on this coefficient. By click the ellipsis ("...") button, the user can add a K-factor they want to use during demand allocation. This will automatically create a User Data Extension (UDX) with the K-factor used in the model. The user can also go to Tools > User Data Extensions. When the K-factor UDX attribute is created by the user through the UDX dialog, a Real/Unitless ("None" dimension) attribute is expected. Using this method allows the user to enter values through the FlexTables or properties grid, or even importing them through ModelBuilder. It also allows the user to define the name of the field, since creating the K-factor UDX in the LoadBuilder dialog will yield a default name. Once it is created, the K-factor UDX attribute will be available in Unit line method wizard in LoadBuilder. The "Unaccounted-for Demand by Selection Set" table allows the user to assign unaccounted-for demands for the system by selection set. Click the new button to add a row to the table, then choose a selection set (or Entire Network to include all applicable elements) and specify an unaccounted-for demand value. Highlight a row and click the Delete button to remove it. After the data is entered, click Next. This will list the different load types. The screenshot below shows an unaccounted-for demand of 100 gpm across the entire network and a known demand from an existing Demand alternative (which was included when the "Include known demands in results" checkbox was selected). You can also include a multiplier or a pattern in this step. Click Next again, and you will see how the demands will be allocated in for the junctions. The demand will be based on the equations found in the Help documentation under the section "Unit Line Method". Click Next again will allow the user the select a label for the LoadBuilder item and decide if the input will overwrite or append an existing Demand alternative or if it will be assigned to a new Demand alternative. Please review the Help topic "Unit Line Method" for the theory and equations used for this method. See Also How do each of the Loadbuilder methods work?
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Wiki Page: I have PRV's in parallel that are both open at the same time and when I go to compute my model I get a user notification that says, "Network Unbalanced". How do I resolve this?
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD Version(s): 08.11.xx.xx Environment: N/A Area: Modeling Subarea: Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem I have PRVs in parallel at one location in my model and I am getting a user notification that states my network is unbalanced when I compute. In the field both PRV's are open at the same time. When I only run the system with one PRV the model computes fine. How can I resolve this? Background If the PRV's that are in parallel are set to an initial hydraulic grade or pressure setting that are close to each other then what might be happening is the calculation engine would be trying to reduce the pressure downstream to one hydraulic grade and then the other, which causes the results to toggle back and forth because it can't settle on a result as to what the pressure should be. Solution Option 1 Combine the PRV's into a single PRV that uses a hydraulic grade or pressure setting that is an average of the two PRV settings. Then you could consider increasing the size of the pipe directly connecting to the upstream and downstream side of the PRV (for example double the diameter). Option 2 If you'd still like to keep both PRV's in your model you could choose either the higher initial setting, lower initial setting, or a setting that is an average of both (as in example one) and just assign that initial setting to both valves. This is similar to option 1 because we are assuming that downstream of these PRV's where the pipes converge there is some average of the hydraulic grade (pressure).
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Wiki Page: Using Unit Loads and Extreme Flow Factors after a LoadBuilder run (Solution 500000079448)
Applies To Product(s): Bentley SewerCAD, Bentley SewerGEMS Version(s): 08.11.XX.XX Environment: N\A Area: Modeling Subarea: N\A Original Author: Jesse Dringoli, Bentley Technical Support Group Problem Is it possible to use LoadBuilder to import unit loads, so as to apply extreme flow factors? Product: SewerCAD, SewerGEMS (with the SewerCAD solver), SewerGEMS Sanitary Version: 08.11.XX.XX Area: Data Input/Model Creation, Problem ID#: 57927, GENERALINFORMATION Solution LoadBuilder currently imports loads as pattern loads , which is a base flow plus pattern. However, extreme flow factors can only be applied to unit loads . So, if you need to use LoadBuilder to import loading information from a shapefile and then use extreme flow factors, you will need to adjust the loading so that the loads are unit loads instead instead of pattern loads. To do that, you can try the following options. Option 1 For a case where the value being imported is a count of population, you can try the following after importing through loadbuilder. Open the Sanitary Load Control Center, initialize unit loads for all elements using the first icon, then copy the base flow value into the Loading Unit Count field, and populate the Unit Sanitary load (the type). The pattern load should then be deleted from the Sanitary Load Control Center if it is not to be included in the calculation. The screenshot below is what the Sanitary Load Control Center may look like after updating the model with LoadBuilder and copying the data fin the Load Unit Count field, but before deleting the pattern loads. Option 2 If the value imported by LoadBuilder is a total flow, you will need to multiply the base flow by a certain factor to achieve the desired loading count. Then you can enter the correct corresponding unit load. Option 3 If you have shapefiles with land use type and population, you may consider a different approach, using the "Load Estimation by Population" Loadbuilder method to distribute the loads based on population density, load density and service area. This requires that the land use polygons overlap the areas occupied by your manholes, since the loads are distributed based on manholes that fall within the polygons. This also means that you will still end up with Pattern based loads (not unit loads, required for Extreme Flow Factors). So, this method will only work for you if you are able to use Pattern loads. For details, see the below article and also Option 4 for "peaking" pattern based loads: Import loads from shapefile containing polygons with land use type and total population Option 4 Consider using the Pattern Based loads imported by Loadbuilder, applying "peaking" to the base load. For example, after importing pattern loads with Loadbuilder, copy/paste the information from the Sanitary Load Control Center into an external application such as Excel, calculate the peak flows there, then paste back into the sanitary load control center (or re-import using Modelbuilder )
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Wiki Page: Compacting a database for optimal performance
Applies To Product(s): Bentley WaterGEMS, Bentley SewerGEMS, Bentley CivilStorm, Bentley StormCAD, Bentley PondPack, Bentley StormCAD, Bentley HAMMER, Bentley WaterCAD Version(s): 08.11.XX.XX Environment: N/A Area: Other Subarea: Original Author: Mark Pachlhofer, Bentley Technical Support Group This describes how to compact your database in the Haestad line of water and wastewater products in order to save space, increase speed, and prevent possible corruption. This solution also works for some issues when you get a object reference not set to an instance of an object error. Background If you make a lot of changes in a database and do it often, portions of the database may become fragmented. Fragmentation can lead to issues where the database does not function optimally and over time this can cause performance issues or possible corruption. Three of the top reasons to compact the database and purge record regularly are 1) Save space 2) Increase speed of processing 3) Prevent possible future corruptions. For this reason we offer a few ways to maintain the health of your project database files. The first is by automatic database compaction based on the number of times you open the database file via the File > Open function. The second is the manual option. Steps to Accomplish Set your software to automatically compact the database file after opening it a given number of times *Please note that by default the software is set to compact databases automatically after every 10 times you perform a File > Open. Open a project file or start a new project Go to Tools > Options On the Global tab under the General section (first section) you should see a check box that says "Compact database after". To the right of that you are given the option to set the number of times. After you are done click the "Ok" button to enable the changes Manually compact the database Open the software but, do not open your project file. This can be done by clicking on the application icon and selecting close on the Welcome window. Go to Tools > Database Utilities > Compact Database.. In this next step you are presented two options: 1) Retain record to optionally allow elements to be completely restored later 2) Purge records to save space. Option 2 for purging records will work best to help the database functional optimally as it reduces the number of unnecessary records saved.
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