Dear All, I have attached a PDF file which shows an error during validation. Notifications says "Bottom of structure is 8.46m" but base on my input (which you can see also on the attached PDF file) it shows "Elevation(Base)" is 6.16m. Please Help me troubleshoot this. Best Regards, June
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Forum Post: Wet Well Setting Error (Sewer Cad)
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Forum Post: RE: TREX
The latest version of our storm and sewer products (SewerCAD, StormCAD, SewerGEMS and CivilStorm) include a new Terrain Model feature which does have the ability to auto-update ground elevations based on the terrain model. However, this is not yet available for WaterCAD or WaterGEMS. Were some of the new nodes inserted along an existing pipe, by clicking the junction tool on the pipe and choosing "yes" when prompted if you'd like to split the pipe? If so, then yes, it will interpolate the elevation of that new node based on the elevations of the adjacent nodes. Maybe the other nodes you added were placed without splitting a pipe, in which case they will default to an elevation of zero.
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Forum Post: RE: Wet Well Setting Error (Sewer Cad)
Effectively, the "bottom" or invert of a wetwell is the minimum elevation. The wetwell is considered empty if the water surface drops to this point. This is often equal to the base elevation for sewer applications. In a water distribution system, it is more common for the base elevation to be lower than the bottom of the tank itself, such as with an elevated storage tank. You'll notice if you choose "true" for "set invert to stop" on the upstream conduit, it will automatically pick a stop invert equal to the wetwell's "minimum" elevation.
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Forum Post: RE: Gravity Notifications (Sewer Cad)
It depends on the situation - if you simply have two pipes of the same diameter at the same invert elevation leaving a manhole, then combining back together at the next downstream node, then yes, I would suggest modeling as a single pipe with the multiple barrel option. However if the diameters or inverts are different, it's not so simple. If the flow split goes in two different directions with no common downstream point, this also wouldn't be an option. If you don't have access to SewerGEMS or CivilStorm, you'd have to approximate the amount of diverted flow based on the incoming flow. Sometimes a 50/50 split is sufficient, but again it depends on the situation. If this doesn't help, please send in the model so we have a better understanding of the modeling situation. communities.bentley.com/.../bentleysecurefilesupload.aspx
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Forum Post: RE: Gravity Notifications (Sewer Cad)
If these pipes are of similar size, follow similar paths and have a common end point, the easiest way to model them is as a multi-barrel pipe. Just set the Number of Barrels to something greater than 1.
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Wiki Page: "Pressure pipe stop invert is higher than the connected wet-well base elevation..."
Applies To Product(s): Bentley SewerCAD, Bentley SewerGEMS Version(s): 08.11.04.54 Environment: N/A Area: Layout and Data Input Subarea: Original Author: Jesse Dringoli, Bentley Technical Support Group Problem Description What does the following User Notification mean and what can I do to work around it? "Pressure pipe stop invert is higher than the connected wet-well base elevation so a pipe stop invert set equal to wet-well base elevation" Steps to Resolve This notification is there to warn you of a limitation in this situation. During calculations, the program will override your selection of the stop invert of the pressure pipe and set it equal to the bottom of the wetwell. It doesn't mean that there's a problem, but rather an assumption to be aware of so that you can decide how to proceed. The model will still calculate, and the results will be reliable, assuming that you're OK with the assumption of the invert being set to the bottom. The implications of this are the same as if you manually connected the pressure pipe to the bottom of the wetwell. This means that the upstream pump will need to add less head than it would have. Depending on the pump curve and system head curve, this may not make a significant difference. This is likely why this assumption is in place, as most systems like this would see a negligible difference. If you feel that the operating point of the upstream pump and the information you ultimately need might be effected by this assumption, the manhole workaround can be considered. You mentioned that the manhole isn't there in the real system - this is true - the manhole suggestion is a workaround in order to allow the hydraulics to behave as they would with the invert connected at a higher elevation. If your goal is to make sure that the existing system is working OK, then this should not be a concern - if the pipe between the "fake" manhole and the wetwell is hydraulically insignificant (large and smooth), it will not effect the results, and the model should act just as it would in the field where the upstream pressure pipe is connected directly to the wetwell at an elevation higher than the bottom. From doing this, you could also compare the results to that with the pipe connected directly to the bottom of the wetwell, as a sensitivity analysis. If the end results you need are not noticeably different, then you might conclude that the manhole workaround is not necessary. We will look into improving SewerCAD in the future to allow a pressure pipe to be connected directly to the upstream side of a wetwell at an elevation higher than the bottom (reference # 136510). See Also
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Comment on Why is StormCAD over-designing the conduits during a design run on a system with very shallow slopes?
Hi Rasha, This enhancement was introduced in version 08.11.03.77, so you will need to upgrade
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Forum Post: RE: Gravity Notifications (Sewer Cad)
Jesse, I uploaded already the file. The pipe I am referring to is labeled "CO-960_581-C20". I hope I did uploading correctly. Please inform me if you did not see it. Regards, June
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Forum Post: RE: Negative Demand
Dear Jesse Finally I found out how Negative Demand works by your explanations. Thank you and Mall very much Sim
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Forum Post: RE: Pump Selecting
Dear Jesse Let me read above references. Ill come back then. Sim
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Forum Post: RE: Help With setting up a VSP or VFD with 4 pumps.
Jesse and Tom, Any feedback on my model yet??
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Forum Post: RE: Gravity Notifications (Sewer Cad)
Hi June, We received your model. The area in the red box below will show you where you have to change the properties of this conduit to a multiple barrel conduit as Tom and Jesse have indicated. I have already made the change for this conduit to a two barrel conduit in the screen shot.
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Forum Post: RE: Gravity Notifications (Sewer Cad)
Mark, Please see above discussions regarding what I am asking Jesse. I already did it, but I cannot see any changes after doing that. regards June
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Forum Post: RE: Gravity Notifications (Sewer Cad)
I'm sorry I guess I missed that part. Also, in the model that you sent I saw where this conduit only had one barrel assigned to it, so I thought you might still have been confused on that. When you run the conduit as a 2 barrel conduit vs. a 1 barrel you will see the changes, which I have outlined in the attached Word document. The word document starts by showing a screen shot of the top half of 1 barrel conduit properties and then the top half of the two barrel conduit properties section. The 3 screen shot is the bottom half of the 1 barrel conduit properties, which is again followed by the bottom half of the two barrel. I have placed red boxes around each of the properties that differ in the use cases. This would also be a perfect opportunity for you to test something out like this yourself, but taking advantage of scenarios and alternatives feature. In this case you'd only be creating a new physical alternative for this particular conduit. For more information on scenarios and alternatives you can refer to this wiki technote: https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/4508.scenario-and-alternative-management.aspx Regards, Mark
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Wiki Page: SELECTsupport TechNotes And FAQs
Key: CS – Client Server Article FAQ – Frequently Asked Questions TB – Technical Bulletin TN – TechNote VID – SELECTsupport Video The following TechNotes and FAQs are provided as a reference by Bentley's Technical Support Group. Licensing Pre-XM Licensing of Bentley Haestad Products XM Licensing Of Bentley Haestad Products General SentinelLM Server FAQ XM License Configuration General Compatibility Chart [[Performing a silent installation for Bentley's Water products]] Learning resource guides for new users PondPack V8i SewerGEMS V8i CivilStorm V8i HAMMER V8i SewerCAD_V8i StormCAD_V8i Bentley SewerCAD V8 XM and V8i Modeling Force Mains With Air Valves Importing Loading Information Using Modelbuilder Loadbuilder - Flow Monitoring Distribution Creating User-Defined Profile Settings Using Fit To Page Printing In The Standalone Platform Scenario and Alternative Management Active Topology Management Creating formula-based User Data Extensions What's new in SewerCAD V8i SELECTseries 2? What's new in SewerCAD V8i SELECTseries 3? What's new in SewerCAD V8i SELECTseries 4? Importing a CAD Drawing Using Modelbuilder General SewerCAD FAQ SewerCAD vs. SewerGEMS vs. SewerGEMS Sanitary Bentley StormCAD V8i Creating User-Defined Profile Settings Using Fit To Page Printing In The Standalone Platform Transferring Custom Inlets Catalogs,Storm Data, Conduit Catalogs, or Flow-Headloss Curves from One Computer to Another Scenario and Alternative Management Active Topology Management Creating formula-based User Data Extensions Importing a CAD Drawing Using Modelbuilder General StormCAD FAQ What's new in StormCAD V8i SELECTseries 2? What's new in StormCAD V8i SELECTseries 3? What's new in StormCAD V8i SELECTseries 4 ? Bentley HAMMER V8 XM Modeling a Pump Start-up Transient Event Using Fit To Page Printing In The Standalone Platform General HAMMER V8 XM FAQ Bentley HAMMER V8i Modeling a Pump Start-up Transient Event Modeling Reference - Hydropneumatic Tanks Modeling Reference - Air Valves Modeling Reference - Surge Valves Modeling Reference - Valves Of Various Types Modeling Reference - Valve With Linear Area Change Modeling Reference - Discharge To Atmosphere Modeling Reference - Check Valves Using Turbines in Bentley HAMMER Modeling existing valves as Throttle Control Valves in HAMMER Using Modulating PRVs Using Fit To Page Printing In The Standalone Platform Modeling An Initially Partially Closed Valve Scenario and Alternative Management Active Topology Management Creating formula-based User Data Extensions Importing a CAD Drawing Using Modelbuilder General HAMMER V8i FAQ Protective Equipment FAQ What's new in HAMMER V8i SELECTseries 2? What's new in HAMMER V8i SELECTseries 3? What's new in HAMMER V8i SELECTseries 4? Bentley Pondpack V8i Scenario and Alternative Management Active Topology Management Using PondMaker What's New in Pondpack V8i? Entering Storage Chamber Information [[Understanding the Modified Rational Method]] Bentley SewerGEMS V8i Loadbuilder - Flow Monitoring Distribution Using Fit To Page Printing In The Standalone Platform Creating User-Defined Profile Settings Scenario and Alternative Management Active Topology Management Creating formula-based User Data Extensions Importing a CAD Drawing Using Modelbuilder Running a Long Term Continuous Simulation General SewerGEMS For ArcGIS FAQ Modeling Reference - Headwalls General SewerGEMS FAQ [[Understanding the Modified Rational Method]] SewerCAD vs. SewerGEMS vs. SewerGEMS Sanitary What's New in SewerGEMS V8i SELECTseries 2? What's New in SewerGEMS V8i SELECTseries 3? What's New in SewerGEMS V8i SELECTseries 4? Bentley CivilStorm V8i Scenario and Alternative Management Active Topology Management Creating formula-based User Data Extensions Running a Long Term Continuous Simulation Importing a CAD Drawing Using Modelbuilder [[Understanding the Modified Rational Method]] What's New in CivilStorm V8i SELECTseries 2? What's New in CivilStorm V8i SELECTseries 3? What's New in CivilStorm V8i SELECTseries 4? Bentley WaterGEMS V8 XM Importing A CAD Drawing In Bentley WaterGEMS Importing Demands From A Spreadsheet Understanding Automated Fire Flow Results Adding Multiple Minor Losses To A Pipe Using Fit To Page Printing In The Standalone Platform Scenario and Alternative Management Active Topology Management General WaterGEMS V8 FAQ General WaterGEMS V8 Modeling FAQ General WaterGEMS for ArcGIS FAQ WaterGEMS V8 Automated Fire Flow FAQ Bentley WaterGEMS V8i Active Topology Management Importing A CAD Drawing In Bentley WaterGEMS Importing Demands From A Spreadsheet Understanding Automated Fire Flow Results Creating controls, conditions, actions and controls sets Adding Multiple Minor Losses To A Pipe Importing Time Series Data Using ModelBuilder Modeling Air Valves At High Points Building A Model Using Model Builder Updating A Model Using Model Builder Updating Source File Using Model Builder Using Darwin Calibrator Using Darwin Designer Using Darwin Scheduler Setting Up Pressure Dependent Demand Using Fit To Page Printing In The Standalone Platform Using The Network Navigator Running a Criticality Analysis Using Pipe Renewal Planner Running Pipe Break Analysis Scenario and Alternative Management General WaterGEMS V8 FAQ Opening old models in WaterCAD/GEMS V8 XM or V8i Submodel Importing and Exporting Pump Station and Pump Combination Curves ProjectWise Integration Setting Boolean (True/False) Fields using Model Builder Engine Compatibility Modes and Calculation Options Creating formula-based User Data Extensions Carbon Emission Analysis and Energy Cost Analysis Energy Cost Analysis WaterGEMS V8i SELECTseries 4 Flushing in WaterGEMS/CAD Select Series 4 Modeling top fill tanks and throttling inlet valves SCADAConnect SCADAConnect using Citect Server as data source WaterGEMS V8 Modeling FAQ WaterGEMS For ArcGIS FAQ WaterGEMS V8 Automated Fire Flow FAQ What's new in WaterCAD and WaterGEMS V8i SELECTseries 2? What's new in WaterGEMS and WaterCAD V8i SELECTseries 3? What's new in WaterGEMS and WaterCAD V8i SELECTseries 4? Bentley WaterGEMS 3.0 Setting Up An Automated Fire Flow Analysis In WaterCAD 7.0 Or WaterGEMS 3.0 General WaterCAD 7.0 Or WaterGEMS 3.0 FAQ See Also WaterCAD product information WaterGEMS product information Product TechNotes and FAQs External Links Haestad Methods Water Solutions on Bentley Website Haestad Solutions eSeminars WaterCAD Trailer Video WaterGEMS Trailer Video WaterCAD User Guide WaterGEMS User Guide Advanced Water Distribution Modeling and Management online textbook Support page on Bentley website Bentley technical support KnowledgeBase
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Forum Post: How to model manhole in HAMMER
I am trying to model transient in forcemain with manholes (open to ground) in it. Which element in HAMMER would be the most appropriate? Thanks Hailiang
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Forum Post: RE: Help With setting up a VSP or VFD with 4 pumps.
Hello, We have taken a look at the model. There a few issues that need to be address. First, there are a number of manholes in the model with elevations that are set to zero and with invert elevations that are higher than the ground elevation. These will need to be addressed before you will be able to compute the model. Running a validation will display these, but you can also look at the element flextable to see them. Second, there is an issue with the wet wells using the Section type of "Variable Volume" when the elevation of the wet well is negative. This issue has been reported to development with reference #141601. For now, one workaround that you can try is to use a different section type, such as "Constant Area – Non-Circular.” With the correct volume data entered, no red user notifications will be generated for the wet wells with this setting. Please let us know if you have any questions. Regards, Scott Kampa Bentley Technical Support
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Forum Post: RE: How to model manhole in HAMMER
Hello Hailiang, HAMMER can model transients only in the pressurized part of the a sewer model, which typically is made up of force mains (pressure pipes), junctions, and pumps. It cannot model transients in gravity systems, where manholes are typically located. The pressure system may drain into a manhole though. If that is the case in your system, you may want to consider using a discharge to atmosphere element. The discharge to atmosphere element would typically be set as an orifice. You can find more information on the setup of this in the section "Common applications of the D2A acting as an Orifice" in the following TechNote: communities.bentley.com/.../3443.aspx Please let us know if you have any questions. Regards, Scott Kampa Bentley Technical Support
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Forum Post: RE: How to model manhole in HAMMER
A manhole at the end of a force main could simply be represented as a reservoir node with the elevation set to the water elevation in that manhole.
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Wiki Page: In WaterGEMs for ArcMap I do not see a dashed line connecting the customer meters to the associated element like I do in WaterGEMS standalone. Why is this?
Applies To Product(s): Bentley WaterGEMS Version(s): 08.11.XX.XX Environment: N\A Area: Layout and Data Input Subarea: N\A Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem Description In WaterGEMs for ArcMap I do not see a dashed line connecting the customer meters to the associated element like I do in WaterGEMS standalone. Why is this? Resolution The dashed line the connects elements such as isolation valves or customer meters to the associated pipe or element are not supported for WaterGEMs for ArcMap (ArcGIS).
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