As long as the treatment plant has the kinds of hydraulic structures the model can handle (e.g. weirs, orifices), then SewerGEMS or CivilStorm can be used to model hydraulics. I did some testing on the dynamic response of a treatment plant to changes in inflow and found that peaks are dramatically reduced by the tanks themselves. Why are you needing a dynamic model? I wrote a short paper about this. Send me your email and I'll send you a copy (tom.walski@bentley.com).
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Forum Post: RE: Bentley model to construct a dynamic model of WWTP
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Forum Post: RE: fire flow analysis at max hour
Hello Ahmed, If I understand the issue correctly, you should make sure that the different elements in the model are assigned to the proper pressure zones. When doing the automated fire flow analysis, the program is look at the residual pressure at the fire flow node itself as well as the pressures for the junctions in the same pressure zone as the fire flow node. If you only have one pressure zone, that means that a low pressure at a distance node in a different pressure zone will impact the results. In steady, you should make sure you have the junctions assigned to their appropriate pressure zones, in this case likely assigned by their position in relative to the PRVs. This might help with some of the results you are seeing. You can find more information on setting up and using the automated fire flow feature at the following TechNote: communities.bentley.com/.../understanding-automated-fire-flow-results Regards, Scott
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Forum Post: RE: fire flow analysis at max hour
What exactly do you mean by " it affected the fire flow analysis"? If the fire flows decrease because of the PRV, that is expected. If fire flow doesn't run, then you need to describe the error messages you received.
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Forum Post: RE: Bentley model to construct a dynamic model of WWTP
Hi Imtiaz, We have entire list of case studies that you can look over, which you can find located on the Bentley website at this location: http://www.bentley.com/en-us/solutions/water+and+wastewater/case+studies This particular study might be of interest to you: http://ftp2.bentley.com/dist/collateral/docs/case_studies/cs_water_simtejo_PT_EN_1012_A4_p.pdf Regards, Mark
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Forum Post: RE: Modelling Outfall reservoir
Hello amits, Thank you for the model files. From what I can tell based on your description of the issue and after seeing the model so I have a better idea of where the elements are, the best solution may be to try a discharge to atmosphere element at the downstream of the model. With this, you can have flow out of the system (flow that may vary depending on what is happening upstream) and no flow back into the system. The following link has information on the many uses of a discharge to atmosphere element: communities.bentley.com/.../modeling-reference-_2D00_-discharge-to-atmosphere I would look at the section called "Common applications of the D2A acting as an Orifice", as this is the best use case for this issue. It can be used to model a free discharge, such as into a gravity sewer, top-fill tank, or (as in this case) a river. There is information on setting up the D2A in the TechNote, plus there is a sample model specific to the D2A that can be found on your computer at C:\Program Files (x86)\Bentley\HAMMER8\Samples\Discharge_To_Atmosphere_Example.wtg. The key is the property fields for "Flow (Typical)" and "Pressure Drop". These do not need to be exact values, but representative ones. They can typically be derived using the orifice equation. Please let us know if you have any questions. Regards, Scott
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Forum Post: Thiessen Polygon and Load builder+SwerGems
Hi In the following captured Ward-A is representing Single family area with 50person/Hectare and Ward-B is semi-Detached with 175person/Hectare. 1-How can I create a Thiessen Polygon as I can assign the house that are located in the ward-A and discharge into MH-5? 2-I don't have GIS in my machine, how can I import the areas calculated by Thiessen Polygon by LoadBuilder?which LoadBuilder is good for me? 3-when I assign the areas into each manhole, where can I see those assigned area into FlexTable? Thanks Hamid
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Forum Post: RE: Trench Soakaway
Mohammad, 1) It would have to be done in SewerCAD using an EPS run, so you could get hydrograph flow over time at the outfall and enter that as your inflow wet collection into the catchment. 2) You'll need to use the EPA SWMM runoff method for the catchments using the LID controls. You can use runoff methods on your other catchments if you like. If the parent catchment for your LID control would be your soakaway area then you can make sure that catchment is the exact size of your trench and set the option in the LID control for "Occupies Full Catchment?" to True. 3) When I made that statement I was keeping in mind what you stated previously where you said, "I target to design storm water system using Soakaway. how is the configuration/Model the storm water going from manhole/gully to the trench soakaway and the dissipation into the ground (we do not have outfall)? ". If you don't have an outfall I assumed that there is not flow leaving the infiltration trench because otherwise you'd have an outfall. Therefore, if the trench properties were setup with high porosity and a large enough capacity you shouldn't have any flow leaving. The input for those numbers would vary based on your design and are a different for every system, so I can't provide you with more information than that. What's the name of the property that you are referring to when you're talking about the 'gravel layer'? 4) You can download a sample file here: bentley.sharefile.com/.../s3b7cfb465b14ccf8 Regards, Mark
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Wiki Page: How do each of the Loadbuilder methods work?
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD, Bentley SewerGEMS Version(s): 08.11.XX.XX Environment: N/A Area: Modeling Subarea: Original Author: Jesse Dringoli, Bentley Technical Support Group Wiki Author: Dan Iannicelli, Bentley Technical Support Group How do each of the available Loadbuilder methods work and what types of files are required? There is a great deal of good documentation in the Help documentation on this subject. You can find this documentation by goint to Help > Search for Loadbuilder. You will find some good information there. Additionally, below is a brief summary of the different Loadbuilder Methods and how they work. Allocation Billing Meter Aggregation : The service area is a thiessen polygon. Whatever billing meter points fall within the service area will be added as a demand to that service area’s junction. Nearest Node/Pipe : Only need point or polygon shapefile. For polygon, it will use the centroid. The demand will be added to the junction that is closest to that point shapefile/centroid or to the junction adjacent to the pipe, if using nearest pipe. Distribution Unit Line : Not GIS based. Uses k factors. It can account for unknown demands (leakage/unmetered.) Equal Flow Distribution : Uses polygons with single demand values. The junctions/hydrants that fall within the polygon will get an equally distributed portion of the demand. For example, if the polygon represents 100gpm and two junctions fall within it, they’ll get 50gpm each. Proportional Distribution by area : Uses a thiessen polygon (representing the service area of each junction) and billing meter polygon with a single demand value. The demand assigned to the junction is based on how much of the flow polygon is overlapping it’s service area. For example, if 25% of the 100gpm demand polygon falls within a junction’s thiessen polygon, then that junction will get 25gpm: Proportional Distribution by population : Requires Thiessen polygon (Service Area Layer), lump-sum demand polygon (Flow Boundary Layer) and population polygon. This method divides the lump-sum flow among the service polygons based upon one of two attributes of the service polygons: the area or the population. The greater the percentage of the lump-sum area or population that a service polygon contains, the greater the percentage of total flow assigned to that service polygon. Note: The flow boundary layer should be a polygon shapefile that is divided into areas or zones (zone A, zone B, etc..) and will include a flow field that has the overall flow for that particular zone. For this method it helps to think of the Service Area Polygons layer as a cookie cutter that is going to be pressed through the population layer and the flow boundary layer. It’s a combination of the weighting of the population layer and zone flow layer data that will determine the loads that are assigned to your service area polygon layers. Projection Projection by Land use : Uses thiessen polygon and layer of polygons that represent billing meter areas and their associated land use type. The user enters a guess of how much demand per acre is associated with each land use type and based on each polygon’s size, it will then have a specific demand value. This is distributed to the junctions in the same way as with Prop. Distr. By area. Projection by Population : Just like above, except the user is making a guess at how much demand he thinks there is per capita, for each land use type. There is a field in the shapefile for population densirty, so based on the guess, each polygon will have a resulting demand value, which is distributed to the junctions in the same way as with Prop. Distr. By area.
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Forum Post: RE: Thiessen Polygon and Load builder+SwerGems
Hamid, 1-How can I create a Thiessen Polygon as I can assign the house that are located in the ward-A and discharge into MH-5? SewerGEMS has a tool called "Thiessen Polygon" (Tools > Thiessen Polygon) that can do this for you. Regards, Mark
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Forum Post: RE: Thiessen Polygon and Load builder+SwerGems
Hamid, 2-I don't have GIS in my machine, how can I import the areas calculated by Thiessen Polygon by LoadBuilder?which LoadBuilder is good for me? You should have a look at this wiki article that describes all the different Loadbuilder methods. The best method for you depends on how your load data. https://communities.bentley.com/products/hydraulics___hydrology/w/hydraulics_and_hydrology__wiki/10862.how-do-each-of-the-loadbuilder-methods-work Regards, Mark
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Forum Post: RE: fire flow analysis at max hour
it affect the fire flow analysis report because the needed fire flow at each node can not be delivered. do should i run the fire flow analysis in different scenario than the max hourly scenario?
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Forum Post: RE: Catchment Polygon Size
I do not think the color coding is what I am asking. when I import the catchment was done by Excel sheet; so the properities of the catchment shows the correct area but the all of them has the same shape as in the screenshot provided. what I need is how to change the shape and the view size of that shape.
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Forum Post: RE: Catchment Watershed Delineation
Hi Sushma, When I am modeling Storm Water System in StormCAD the most time spends on the divide the catchments and define the direction to manholes; we are looking for a tool to create catchments with flow direction according to the contour/spot elevation we have and then import those into StormCAD/SewerGEMS. we need save time with accurate results. Thanks, MO.
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Forum Post: RE: Snapping watersheds in sewergems
Just following up since that date "too long" and so far the Hydraulics programs do not have that enhancement .. is that will be consider? we would always see those program is the first choice among the engineers. One more thing; if measure tool is to add to Stand alone version will be awesome.
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Comment on is there any automatic method for input Tc, or assign the outflow element to the catchment area to save time?
But how to link the catchments to the nearest manhole in StormCAD? is there tool for that (automatic) or should be done one by one after import the cad file catchment?
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Forum Post: RE: Dividing Catchment in StormCAD
But how to link the catchments to the nearest manhole in StormCAD/SewerGEMS? is there tool for that (automatic) or should be done one by one after import the cad file catchment?
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Forum Post: RE: Bentley model to construct a dynamic model of WWTP
Thanks Dr. Walski, We are trying to construct a dynamic model as a pilot project. Existing literature suggests it may facilitate: a. 'what-if' scenarios (Example, unit off-line, operational changes in gate, weir) b. Assess hydraulic capacities etc. Appreciate your insight and help. Kind regards, Imtiaz
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Forum Post: RE: fire flow analysis at max hour
If you can't meet the needed fire flow, then you need to understand why. If it is due to excessive head loss, then you may need to upsize pipes. If it is due to excessive head loss in a control valve, then the valve may need to be upsize or its setting changed. I'm not sure what you mean by "run the fire flow analysis in different scenario than the max hourly scenario". In the US, fire flow is usually added to the max day demand. You would use the demands from the max day alternative as the starting point for the fire flow analysis.
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Wiki Page: Missing menu toolbar in standalone
Applies To Product(s): Bentley WaterGEMS, Bentley WaterCAD, Bentley HAMMER, Bentley SewerGEMS, Bentley SewerCAD, Bentley StormCAD, Bentley CivilStorm, Bentley PondPack Version(s): 08.11.XX.XX Environment: N/A Area: Other Original Author: Craig Calvin, Bentley Technical Support Group Problem The menu toolbar is missing in standalone (i.e. File, Edit, Analysis, Components, View, Tools, Report, Help) Background In the default workspace layout these menus are docked in the upper left corner of the standalone application as shown below. By clicking on the handle to the left of the menus and dragging, these menus can be undocked, moved and docked to a different area of the application window. The menu toolbar can't be closed (display turned off). Solution Check to see if the menu toolbar was docked to another area of the application window. Close all other application windows and make the application, the menu toolbar is missing from, the active window by clicking on the title bar. Look on all monitors to see if it reappeared. Reset workspace to use the default layout. Press Alt+V to open the view menu. Press W to select the Reset Workspace option. Press Enter or select Yes to confirm you want to reset workspace to the default layout. Open the 32-bit version of the application . Go to the directory the application was installed to. The default location is: C:\Program Files (x86)\Bentley\ProductName\ Locate the exe (e.g. WaterGEMS.exe) and double-click it to open the 32-bit version of the application. Check to see if the menu toolbar reappeared and dock it to the application window. Close the 32-bit version of the application and reopen the 64-bit version by using the Start menu, desktop icon or taskbar icon. The menu toolbar should be docked again. See Also Missing application windows in standalone
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Wiki Page: How do I perform a clean uninstall and reinstall of the Haestad Hydraulics and Hydrology products?
Applies To Product(s): Bentley WaterGEMS, Bentley SewerGEMS, Bentley CivilStorm, Bentley StormCAD, Bentley PondPack, Bentley SewerCAD, Bentley HAMMER, Bentley WaterCAD Version(s): 08.11.XX.XX Environment: N/A Area: Original Author: Mark Pachlhofer, Bentley Technical Support Group How To How do I perform a clean uninstall and reinstall of the Haestad Hydraulics and Hydrology products? Solution 1) Uninstall the application using the windows uninstall procedure from the control panel. 2) After it's done browse to: "C:\Users\ \AppData\Local\Bentley\" and delete the folder in there for the program you're having problems with. Do the same with the program folder at this location "C:\Users\ \AppData\Roaming\Bentley\" and at these 3 locations "C:\Program Files (x86)\Bentley" "C:\ProgramData\Bentley" "C:\Users\ \Documents\Bentley" Note: Please make sure there are no model files that are needed in this location 3) Download a new copy of the installer file using these directions If that doesn't resolve the issue or you are having Licensing Issue with the software please try the instructions below. Please note that any changes made to the registry are permanent, so it's advisable that you speak to your IT professional when trying the steps below or make sure to back up your registry before hand. 4) Open the registry by going to your start button and typing in "regedit" without the quotation marks into the search bar and then hit enter. 5) Browse to "HKEY_CURRENT_USER\Software\Bentley\Municipal Products Group\" and delete the Licensing folder. Also browse to "HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Bentley\Municipal Products Group\" and delete the Licensing folder. 6) Close the registry and try to open the software to see if the problem persists.
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