Applies To Product(s): WaterGEMS, HAMMER, WaterCAD Version(s): V8i, CONNECT Edition Area: Other Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem What are the difference between WaterGEMS / WaterCAD and EPANET? Solution To compare the software we need a way to classify the differences between the software. We will consider the following classification methods in order to compare the two products: 1.Ease of use 2.Hydraulic elements 3.CAD, GIS interoperability 4.Model building tools 5.Advanced hydraulic features 6.Technical Support + Training + Help Documentation Please refer to the document below for a comparison of these categories. (Please visit the site to view this video) See Also Should the EPANET solver and the WaterGEMS/CAD solver give the same results for a model? What are the limitations of importing/exporting an EPANET file?
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Wiki Page: What are the difference between WaterGEMS/CAD and EPANET?
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Wiki Page: What is the difference between WaterCAD and WaterGEMS?
Applies To Product(s): WaterGEMS, WaterCAD Version(s): V8i, CONNECT Edition Original Author: Mark Pachlhofer, Bentley Technical Support Group Problem What is the difference between WaterCAD and WaterGEMS? Solution WaterGEMS is a superset of WaterCAD, so you will get everything you have in WaterCAD plus more with WaterGEMS. Model files use the same file format so files saved in the same version can be opened between both products (if the model was saved in a version less than or equal to the version of the product you're opening it with.) The user interface is identical with the exception of the tools that are not available in WaterCAD. There are two main differences between WaterCAD and WaterGEMS. Six additional modules are available in WaterGEMS The following modules are available in WaterGEMS but not in WaterCAD. You will still see menu items and will be able to open these tools in WaterCAD, but WaterCAD will not be able to license them since the individual modules can no longer be purchased separately. They remain in the product though, for users who had previously purchased the modules separately. (they will show as a separate line item in the license) 1) Pipe Renewal Planner Asset management tool that ranks pipes based on performance aspects (pipe capacity, pipe break history, and critical pipe segments) and optionally, property aspects (material, location, year installed, etc...) to choose which pipes are the most critical to monitor for repairs. *The results from pipe renewal planner can be used in finalizing your capital/master plan 2) Darwin Designer Enter your hydraulic constraints, allowable pipe sizes, and associated unit costs and run automatic or manual designs. The genetic algorithm methodology will evaluate hundreds of thousands of design and rehabilitation strategies based on any of these three objectives: cost minimization, maximizing benefits, or multi-objective. 3) Darwin Calibrator Find optimal values for any combination of the model parameters such as pipe roughness, junction demands, and link operational status, that best match the real-life situation in your hydraulic system. Darwin Calibrator is effective at predicting the most likely areas of hidden leakage hotspots by employing a powerful genetic algorithm optimization technology. *The leakage detection feature won the IWA Project Innovation Award in 2008 4) Darwin Scheduler Find optimal pump operations for fixed or variable speed pumps, optimize your pumps to reduce energy used in the system, and/or reduce the cost of operations of the pumps in the system 5) Skelebrator Skelebrator automatically removes network complexity while maintaining connectivity, hydraulic equivalence, and reallocating assigned demands to your chosen specification 6) SCADAConnect Connect your SCADA data directly to your model to easily calibrate an unlimited number of signals based upon real world conditions, apply initial real world conditions, or compute demands based upon SCADA measured flow rates Four Different Platforms WaterGEMS Includes a Standalone version plus the ability to integrate with three platforms: MicroStation, AutoCAD, and ArcGIS. With ArcGIS integration you have the ability to leverage ArcGIS capabilities. WaterGEMS provides full geodatabase integration, so you can create, display, edit, run, map, and analyze hydraulic models from a geospatial environment. Unlike competing solutions, WaterGEMS and WaterCAD shares the same file type across all the available environments (ArcGIS, AutoCAD, Microstation, & Standalone).This allows the user to easily collaborate with contractors, clients, or colleagues, who can work with the model on their preferable platform and send it back to you to work on in your preferable platform. For example, they will be able to work with the ArcMap platform and send the model back to you with no import, conversion, or loss of information in any way and you could work with the model in Standalone, Microstation, or AutoCAD platform. WaterCAD WaterCAD can be purchased as a StandAlone application where you get the StandAlone version and ability to integrate with Microstation. It can also be purchased with the ability to integrate with the AutoCAD platform where you get the StandAlone, Microstation, and AutoCAD versions at additional cost. WaterCAD cannot be integrated with ArcGIS and doesn't have the ability to use the six tools mentioned above unless the user had previously purchased them at an additional cost. Beyond this, equal versions of WaterCAD (i.e. 08.11.05.61) and WaterGEMS (i.e. 08.11.05.61) are identical.
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Forum Post: What is a reasonable value of tolerance in a water network for velocity rate of pressure change (m/s) after a pump trip event ? 1.5m/s? 5.0m/s? other? Conservative approach appears to be 1.5m/s. Would like to challenge.
Seeking to find what other water utilities/companies around the world use as this design parameter after a pump trip event. velocity rate of pressure change we adopt? Please indicate what design parameter you use for velocity rate of pressure change during a pump trip (surge) event. 1.5m/s 2.0m/s - 5.0m/s 5.0m/s - 10.0m/s 10.0m/s - 15.0m/s More than 15.0m/s 1.5m/s (0%) 2.0m/s - 5.0m/s (0%) 5.0m/s - 10.0m/s (0%) 10.0m/s - 15.0m/s (0%) More than 15.0m/s (0%) View Results Total Votes: 0 User Voting Report
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Forum Post: How to rotate report body in WaterCAD?
Hello, When I would like to print a schematic layout of the model it comes like this: Since my model is landscape, I need the print out to be landscape as well for both header & footer and the model itself, as this proposed layout which I have edited by Paint: Thanks in advance, Baraa
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Wiki Page: How do I model a retention pond?
Product(s): Bentley PondPack Version(s): 08.11.XX.XX Area: Modeling Problem How do I model a retention pond? HS1121549 Solution A retention pond has no outlet device draining the pond. Therefore, a retention pond will catch the entire runoff volume into the pond. There are two ways to calculate the volume draining into a retention pond: Compute a runoff hydrograph and integrate the area under the hydrograph to calculate the total runoff volume. PondPack performs the volume calculation automatically. If using the SCS CN equation for runoff, compute the runoff depth using the CN and total rainfall depth. To compute total runoff volume, multiply the runoff depth by the contributing area. To model a retention pond as part of a pond network, simply insert a pond node that does NOT have a pond routing link going out of the pond node. You can model the retention pond as shown below, with outfall set to boundary element and should be connected to the pond. See Also
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Forum Post: RE: "This node is orphaned. There cannot be any orphaned, active nodes in the model."
For the reference of other users who will refer this post, we have updated the wiki on modeling detention ponds.
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Forum Post: Pump Elevation
Hi everyone, I would like to ask the significance of using the right elevation of pump. I make a model with a submersible pump having a setting of 72m which supplies a tank at a fixed demand. I try to change the pump setting from 72m to 84m to address the effects of draw down but based on my model, the pressure at the tank is still the same. Is this result really okay? I was assuming that the pressure should decrease due to the added elevation in which the water will be pumped out. Is the elevation of the pump does not affect the pressure at the tank? Appreciate any help. Thanks Rowell
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Forum Post: RE: PSV in transient model (Hammer)
Thanks Jesse, Is there any available pump startup sample model which includes air expulsion?
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Forum Post: RE: Pump Elevation
Thanks Rowell. I concur with Tom's answer; the elevation of the pump node does not impact the HGL as the pump is adding head to the upstream HGL, which are irrespective of the pump physical elevation. The concern would be the pressure/NPSH at the pump itself.
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Forum Post: RE: Pump Elevation
Thanks Jesse, but I also would like to inquire about the effect of friction. From hydraulic, I remember that the friction loss is directly proportional to the length of pipe, meaning the longer the pipe, the larger the friction loss. Is this concept not applicable in this situation?
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Forum Post: RE: Pump Elevation
Rowell, Are you saying that the pipe length is also changing, in addition to the elevation of the pump changing? If so, the change in length should be made in the pipe properties. You would indeed expect different pressure results with a change in length, due to change in friction losses.
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Wiki Page: Error when using TRex: No Matching Data: All elements in the model fall outside the scope of the DEM.
Applies To Product(s): WaterGEMS, WaterCAD, SewerGEMS, SewerCAD, CivilStorm, StormCAD, PondPack Version(s): 10.00.XX.XX, 08.11.XX.XX Area: Layout and Data Input Original Author: Terry Foster, Bentley Technical Support Group Error or Warning Message When attempting to use Terrain Extractor, the following error occurs: No Matching Data All elements in the model fall outside the scope of the DEM. It is possible the spatial elements of the model and/or the units of the DEM are different from those that were chosen. How to Avoid 1) Make sure you have node elements in the model. Trex only assigns elevations to existing nodes in the model based on where they overlap the contour. 2) Check to see if you are using the same unit in the TRex wizard as the one used in the input file (i.e. ft or m). 3) If the units are accurate, confirm that the spatial data for the file you are using to input for the elevation data falls in the same spatial coordinates as the model files. A good way to test this is to add the file you are using in TRex as a background layer. If the file does not line up with the model files when loaded as a background file, that means that the coordinates of the file you are using in TRex does not have the same coordinates as the model file. If that occurs, you will need to adjust the coordinate data file to match the coordinates of the model, or vice versa. See Also TRex Terrain Extractor Tool
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Forum Post: RE: Pump Elevation
But increasing the length by 12 m is not going to make a significant difference in HGL. Try it and see. That's what models can do.
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Forum Post: RE: TREX, I am getting the "All elements in the model fall outside the scope of the DEM..."
Note that the wiki article in question has been amended to make this point clear as well (Trex updates existing nodes, which need to be present in the model first)
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Forum Post: RE: PSV in transient model (Hammer)
Manfredi, No, we currently do not have any example models with a scenario demonstrating air expulsion from a pump startup. A close approximation is the "inrush" scenario in the "Discharge_To_Atmosphere_Example" model. This uses a Periodic Head-Flow element to approximate the head change. See the Hydraulic Model Properties (under the File menu in the CONNECT Edition) for more explanation behind this scenario.
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Forum Post: RE: PRV setting can not be maintained?
Hello Craig, I am using waterGems 08.11.06.113 applied patch at 1/27/2016. I am computing the fire scenario. and when i try to fix PRV like at J-82 first of all the pipe is seemed to be closed. and the pressure downstream the PRV does not maintain at the pressure value set.
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Wiki Page: How do i delete orphan nodes?
Product(s): Bentley WaterGEMS, WaterCAD Version(s): 08.11. Area: Modeling Problem I imported several hundred junctions using Modelbuilder, but not all junctions are attached to the pipes. I want to get rid of those junctions, is there a way to automatically find all orphaned nodes and delete them? Solution If you want to find all orphaned nodes then there is a tool for it, it is called Network Navigator. It can be found under View>Network Navigator>Click on Query (" > ")>Network Review>Orphaned nodes. This will select all the orphan nodes in the model, then select all these in drawing and hit delete. See Also
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Wiki Page: How do I model a retention pond?
Product(s): Bentley PondPack Version(s): 08.11.XX.XX Area: Modeling Problem How do I model a retention pond? HS1121549 Solution A retention pond has no outlet device draining the pond. Therefore, a retention pond will catch the entire runoff volume into the pond. There are two ways to calculate the volume draining into a retention pond: Compute a runoff hydrograph and integrate the area under the hydrograph to calculate the total runoff volume. PondPack performs the volume calculation automatically. If using the SCS CN equation for runoff, compute the runoff depth using the CN and total rainfall depth. To compute total runoff volume, multiply the runoff depth by the contributing area. To model a retention pond as part of a pond network, simply insert a pond node that does NOT have a pond routing link going out of the pond node. You can model the retention pond as shown below, with outfall set to boundary element and should be connected to the pond. See Also
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Wiki Page: What are Cipolletti Sharp Crested Weirs?
Product(s): Bentley PondPack Version(s): 08.11.XX.XX Area: Modeling Problem What are Cipolletti Sharp Crested Weirs? HS1122136 Solution These weirs are trapezoidal shaped with 1:4 side slopes to compensate for end contraction losses. The bottom of the notch should be set above the upstream channel bottom a height of at least twice the maximum head, preferably more. See Also
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Wiki Page: What are the flow characteristics of a Broad Crested Weir?
Product(s): Bentley PondPack Version(s): 08.11.XX.XX Area: Modeling Problem What are the flow characteristics of a Broad Crested Weir? HS1122124 Solution A broad crested weir has a crest that is extended horizontally in the direction of flow far enough to support the nappe and fully develop hydro-static pressure for at least some short distance. See Also
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