Update: Here is the result when I turned off the overflow. It looks like the manhole HGL dropped almost 1.5 ft from the previous graph. Am I missing something? It seems odd that the HGL dropped despite removing the overflow conduit. (Note that the manhole already discharges to two (non-overflow) conduits. Sorry for flooding the Bentley community with posts. Thanks, Seth
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Forum Post: RE: Troubleshooting Overflow in an Existing Municipal Sewer Network
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Wiki Page: Pond and pond outlet assumptions in StormCAD, SewerGEMS, CivilStorm and SewerCAD
Applies To Product(s): Bentley SewerGEMS, Bentley SewerGEMS, Bentley StormCAD, Bentley Civilstorm Version(s): 08.11.03.xx and later Environment: N/A Area: Modeling Subarea: Original Author: Scott Kampa, Bentley Technical Support Group Problem Description How are ponds and pond outlet structures modeled with the different products and solvers? Steps to Resolve Solver: Implicit Dynamic (SewerGEMS Solver): Pond with no control structure If there is no control structure used ("Has Control Structure" = "False"), then the Pond outflow is based on the hydraulics of the adjacent link. The dynamic wave solver calculates the flow restriction based on the size of the conduit or channel. approximate (Qin = Qout). Typically a control structure or headwall is suggested for best results. Pond with control structure Pond routes through Outlet Control EQT table and the Rating curve. The downstream flow is based on Pond Initial Water surface level and downstream Outlet control elevations. In these cases, flow in will not always equal the flow out of the pond. If you graph the pond results, the pond's initial flow will correspond with elevation plus flow from the EQT table. Note: You can have multiple Outlets in same branch. Solver: GVF-Rational (StormCAD solver): NOTE: StormCAD is a steady state (peak flow) modeling software and will not calculate Pond Volume hydrograph solutions.Current versions of StormCAD can open and interchange files from SewerGEMS, CivilStorm, and SewerCAD making it a far more useable and convenient software. This allows for elements from the other products to be accessible in StormCAD such as the Pond and Pond Outlet Structure elements. These elements are not native to StormCAD and are modeled differently. To see and lay out a pond or pond outlet, you may need to click the arrow at the bottom of the vertical layout toolbar and choose to add it. Pond with no outlet structure Only Rational flows are allowed by catchments & they are reported as rational flows + system CA at the outfall. For this pond data type, the pond is treated the same as a manhole node in the flow calculation; all fixed and rational flow elements pass through the pond without any change and downstream all related flow is calculated as normal, i.e. you would expect the same flow results if the pond is replaced by a manhole node. For the profile calculation, when the backwater calculated hydraulic grade line at the pond is lower than the user specified initial pond elevation, the initial pond elevation is used as the pond hydraulic grade line and for backwater calculation of the upstream elements. Pond Infiltration is ignored in the GVF- Rational solver. Pond with outlet structure You can use the pond initial elevation to control the outflow; the solver uses the specified pond initial elevation and performs hydraulic calculations for the outlet control structures to determine the pond outflow. Once the pond outflow is determined it becomes a fixed flow (system additional flow) and all other fixed and rational flow elements are terminated at the pond outlet and the new fixed outlet flow will carry on to the downstream calculations. In other words, if you had a fixed flow coming into your pond from an upstream conduit that flow would not be included in the outflow from the pond. The outflow from the pond is exclusively determined from the user defined initial elevation you enter, which is then calculated from the volume type you choose for the pond and the composite outlet structure rating curve. Also note that even inflows that are entered in the pond are excluded from the outflow calculations when using an outlet structure in a pond. For the profile calculation, when the backwater calculated hydraulic grade line at the pond is lower than the user specified initial pond elevation, the initial pond elevation is used as the pond hydraulic grade line and for backwater calculation of the upstream elements. Solver: GVX Convex (SewerCAD solver): Pond results for EPS runs without Outlet Structure Gravity sub-network cannot have more than one outfall. Pond Infiltration is ignored within the GVF-Convex solver when the pond is not connected to an outlet structure. If pond outlet has no control structure, Pond is treated as a manhole in flow calculation. Catchments flows are routed downstream during EPS simulation and they add to the flow downstream. Pond results for Steady State runs without Outlet Structure Only Catchments are ignored within GVF-Convex solver during a Steady State simulation or design run. Everything else is calculated in the same manner as EPS calculations. Pond results for EPS run with Outlet Structure Catchments flows are routed downstream during EPS simulation and they add to the flow downstream. The pond initial elevation is the start pond HGL for the storage routing and the inflow hydrograph is determined from the upstream convex routing. The pond outflow will be determined by EQT Rating table. Infiltration applies to EPS calculations. Note: you cannot use multiple outfalls with the same branch. Pond results for Steady State runs with Outlet Structure Catchments are ignored during Steady State run. The pond outflow will be determined by EQT Rating table. If there is a control structure and the initial elevation is larger than the one given by the outlet pipe profile calculation then the initial elevation is set as the pond HGL. If you select Invert as initial pond elevation type, then the GVF engine picks the initial HGL based on higher elevation value between pond invert and outlet control elevation.
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Forum Post: RE: Pond Outlets - CivilStorm vs. PondPack
Hello Seth, In CivilStorm (and SewerGEMS), the link element (conduit or channel) downstream of a Pond Outlet Structure node represents the link that the control structure discharges to. The culvert pond outlet control structure represents a restriction due to the entrance of a culvert barrel. Although the barrel length is a parameter, you likely won't be double-counting by connecting this to a conduit that represents the length of the culvert barrel. If the pond outlet represents a culvert (or a weir the shape of the downstream channel), another option is to set "Has Control Structure" to "False" for the Pond Outlet Structure. In this case, assuming you're using the Implicit dynamic solver, the program will still simulate restriction based on the shape of the adjacent link element, then discharge the pond outlet into the upstream end of the link. See more on this here: Pond and pond outlet assumptions in StormCAD, SewerGEMS, CivilStorm and SewerCAD However with recent releases of CivilStorm, the Headwall element may be a better option for you. With this, you can replace the Pond Outlet Structure node with a Headwall connected to a conduit and the culvert loss and pond outflow restriction will be simulated. More on headwalls here: Headwalls
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Forum Post: RE: Troubleshooting Overflow in an Existing Municipal Sewer Network
Hello Seth, What program are you using? If you are using SewerGEMS or CivilStorm, it's possible that by making adjustments to the model that you improved the continuity error, which impacted the overflow volume. Information troubleshooting the continuity error can be found at the following link: communities.bentley.com/.../21403.troubleshooting-unstable-sewergems-and-civilstorm-results-using-the-implicit-solver . Otherwise, it would be good to have more information on the system. If needed, you can provide the model as well. 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. Please be sure to reply on this thread with the name of the file after it has been uploaded. communities.bentley.com/.../7079.be-communities-secure-file-upload If you upload the files to the Sharefile site, make sure to post here so we know it's available. Regards, Scott
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Forum Post: RE: I have some problem
Thank you , Thank you , Thank you ...Mr. Jesse Dringoli , Manager, Technical Support , at now I dont have problem , yes problem is (- it is possible that the tank is becoming empty, causing the built-in altitude valve to close the adjacent pipes and possibly disconnecting some assumed demands. You may need controls to prevent this.) ...... Regards Darun
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Forum Post: RE: Pond Outlets - CivilStorm vs. PondPack
Thanks for the update. I am validating a model, and wanted to make sure I was entering info correctly. I did try using no outlet structure, and using the downstream culvert, but the pond ended up drawing down way too fast. Seth V. Erlich, P.E.* Project Engineer IV CHA ~ design/construction solutions Office: 518.453.3914 serlich@chacompanies.com www.chacompanies.com *NY, GA Responsibly Improving the World We Live In
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Forum Post: RE: Troubleshooting Overflow in an Existing Municipal Sewer Network
Scott, I couldn’t get the files to upload (after noticing that I didn’t post the output). You are correct about the error. It dropped from 8.4% to 4.3% by removing the overflow. It seems I am struggling to balance capturing ‘lost flow’ and adding elements that increase continuity error. What error is considered acceptable? 5% or below? Thanks, Seth V. Erlich, P.E.* Project Engineer IV CHA ~ design/construction solutions Office: 518.453.3914 serlich@chacompanies.com www.chacompanies.com *NY, GA Responsibly Improving the World We Live In
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Forum Post: RE: Troubleshooting Overflow in an Existing Municipal Sewer Network
Graphs with overflow conduit in place: (Please visit the site to view this file)
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Forum Post: RE: Water don' t go through wet well inlet - Sewergems
Marie-Joelle and I discussed changing here wet well type from depth-area to a constant area type. This was to work around a minor defect that she encountered when using a depth area type wet well. The defect will be fixed in the next version of the software that is due out in a few months.
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Forum Post: Pipes going to Origin in Watercad for AutoCAD. What gives?
Hello! When using Watercad for Autcad, we've run into a problem a few times and I haven't been able to figure out just what is going on, or if there is a good way to recover from it. I've searched the forums and internet but haven't found anything yet. On a few projects we've run into an error where the pipes seem to go from their end nodes to the drawing origin (see attached screen shot). I think this happens when the user is a little impatient with opening and closing models. I believe this has to do with how Watercad communicates with AutoCAD because the model still works, pipes maintain their properties (even length), and it looks and operates normally in the standalone version of WaterCAD. But graphically it is ruined in watercad for autocad, and is just a big pain in general. We have tried all kinds of tricks to save the drawing but nothing has worked. We have always rebuilt a new dwg file using the model database. Unfortunately, this can be very time consuming. Of course, this problem only occurs hours before a submittal. Any thoughts on what is happening, how to prevent this, or how to recover without recreating the .dwg? Thanks in advance!
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Forum Post: RE: Civil Storm Pond Design
Scott, Thank you so much for your responses and it is very helpful. I was able to resolve Item 3 & 4. Please see below for remain issues for item 1 & 2. I uploaded the models name Case 1 and Case 2. Thanks. 1) Model Case 1 - I linked the pond outlet to the outfall with a channel. However, i got a message "Kr (reverse flow entrance loss coefficient) was not specified. Kr was set to same value as Ke= 0.200." Can you please direct me how to resolve it? Also, does Bentley have a library already created for the "Culvert Inlet Coefficients" under the "Composite Outlet Structures"? I could located within the installation of CivilStorm like other library such as the conduit library. 2) Model Case 2 - The error message "The referenced Culvert Barrel Shape does not match the conduit" can be found after the model ran. Thank you so much for all your helps. Also, can we request someone from Bentley to provide some live webinar for my company beside those lessons on Bentley LEARNserver? Thanks again. Alex
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Forum Post: RE: Pipes going to Origin in Watercad for AutoCAD. What gives?
I first recommend downloading and installing the latest graphics card driver from the manufacturer's website. I have seen many visual issues fixed by doing this. If that doesn't help, please provide the model. 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. Please be sure to reply on this thread with the name of the file after it has been uploaded. http://communities.bentley.com/help/w/be_communities_help/7079.be-communities-secure-file-upload
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Forum Post: RE: Pipes going to Origin in Watercad for AutoCAD. What gives?
Here is an article that may help. Updating video drivers and troubleshooting video hardware issues
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Wiki Page: How to model an inlet using a Depth (Head) vs Captured Flow (Inlet Capacity) graph
Product(s): SewerGEMS, CivilStorm, StormCAD Version(s): 08.11.xx.xx Environment: N\A Area: Modeling Introduction Bentley SewerGEMS, CivilStorm, and StormCAD applications provide engineering libraries containing many typical inlets. There may be instances where you need to create an inlet that is not already defined. This article explains how to create an inlet using a depth (head) vs. Captured Flow (Inlet Capacity) graph. Steps 1. Open the Components dialog, and select Inlet Catalog. 2. Click the New icon and set the Inlet Type to "Gutter Depth vs. Captured Flow". 3. Enter the depth (head) and corresponding captured flow (Inlet Capacity) values. The inlet is now set up and ready to use in the current model. To make it available for use in other models, click on the Synchronization Options button and select Export to Library. This article explains how to add entries to Engineering Libraries. 4. For each catch basin you want to use this inlet, set the property Inlet Type to Catalog Inlet and set the property Inlet to the one you created. See Also Modeling Neenah Grate Inlets Modifying and adding entries to Engineering Libraries Original Author: Craig Calvin
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Wiki Page: Can a model be saved down or back to an older version?
Applies To Product(s): Bentley WaterGEMS,WaterCAD,HAMMER, StormCAD, SewerCAD, CivilStorm, SewerGEMS Version(s): 08.11.XX.XX Environment: N/A Area: Other Original Author: Dan Iannicelli, Bentley Technical Support Group Question Can a model be saved down or back to an older version? A user with an older version is not able to open a project I sent them. Can a model be 'saved down' to an earlier version? Solution A model cannot be saved 'down' and most versions are not backwards compatible. For example, if you've created and saved a model in WaterGEMS V8i SELECTSeries 6, a user with an earlier version of will not be able to open it. New releases of the programs have introduced many new element types and features, which will often not be interpreted by an older version of the product. Another reason is that the structure of the database files used to store model data (the 'schema') was changed to accommodate improvements and new features. The older versions cannot interpret the new database format. Below are the options available to resolving this issue. Option 1: Upgrade The recommended solution is to upgrade to the latest version of the software, or at least the version used to modify the model you want to open. Downloading Haestad / Hydraulics and Hydrology Software Option 2: Export to EPANET (Water) or EPA SWMM (Sewer) If the user is not able to upgrade to your version, the best workaround for the Water products (HAMMER, WaterCAD, & WaterGEMS) would be to export the model to the standard EPANET format (File > Export > EPANET). This format can be opened in most older versions (File > Import > EPANET). For example in older v8i versions, you can import EPANET via File > Import > Network. Note that there are limitations with this method such as only being able to export one scenario, and other items described in this wiki article . The best workaround for SewerGEMS and CivilStorm would be to export the model to the EPA SWMM format (File > Export > SWMM v5). After that the SWMM file can then be opened by most older version of the software (File > Import > SWMM V5). As with the EPANET for the water products, you may also run into some limitations or have the potential to lose some information in the process of the export/import. In SewerCAD and StormCAD, you can export the model to the LandXML format (File > Export > LandXML) and import the LandXML file into the older version of SewerCAD or StormCAD. Option 3: Export to Shapefiles Another workaround would be to export all elements in your model to shapefiles and then import those shapefiles with the older version of the software using ModelBuilder. The first thing you need to do if you're using this method would be to make sure all your FlexTables have all the information you input for the properties of each element and then export each element to Shapefiles. Export your elements to Shapefiles is described in the following wiki: Converting your model elements to Shapefiles After you do this you would need to use the ModelBuilder tool in the older version of the software (Tools > ModelBuilder) to import all those elements back in. Using ModelBuilder to construct a network is described in this wiki found below and there is also information in our help documentation on how to use ModelBuilder: Building A Model Using ModelBuilder [TN] This method can take some time to work through. It will assure the data is imported accurately. However, each scenario will need to be done separately. See Also "Unsupported dataset type schema" error or "Object reference" error when opening a model
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Forum Post: RE: How can i open SewerCADSS5 file on SewerGEMS SS4.
Nawnit, The short answer to your question is yes, but it will require a conversion of the file to another format because our software is not backwards compatible. This wiki entry explains this in more detail: communities.bentley.com/.../10184.can-a-model-be-saved-down-or-back-to-an-older-version Regards, Mark
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Forum Post: RE: GEMS project datafile not found
Jesse, I uploaded the files related to my project in question via sharefile, although I was not sure how to confirm that the file uploaded? Could you take a look at all the files available and see if it can be repaired. I tried following your instructions through the Windows Access, but could not figure out how to go about conducting the repair. Once again, thanks.
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Wiki Page: Use Darwin Calibrator based on hydrant flow tests
Product(s): Bentley WaterGEMS Version(s): 08.11.XX.XX Environment: N\A Area: Modeling Subarea: N\A Problem How do I set up Darwin Calibrator to calibrate the model based on hydrant flow tests? Product: WaterGEMS, WaterCAD Version: 08.11.XX.XX Area: Modeling, Problem ID#: 76873 Solution Enter each test as a field data snapshot, with the hydrant flows as demand adjustments and the residual pressures as observed targets. Below outlines the process: 1) Create a new calibration study and select the correct representative scenario 2) In the Calibration study, create a new field data snapshot for each hydrant test 3) For each snapshot, enter the appropriate time and date that the test occured. In the Observed Target tab at the bottom, enter the observed "residual" pressure at the appropriate locations during the time when the hydrant was flowed. 4) In the Boundary Overrides tab, enter the status of elements in the model during that particular test, such as the level in a tank, status of a pump or valve, etc. 5) In the Demand Adjustments tab, enter the residual flow at the hydrant when it was opened. 6) In the roughness groups tab at the top, define groups of similar pipes that tend to have the same roughness (see documentation for more guidance on this), which Darwin will have the freedom of adjust as a group (apply the same multiplier to all pipes in the group) 7) If there are demands in the model that are uncertain, enter them in the Demand Groups tab. Darwin will be able to adjust the demand as part of the calibration process. 8) If there are elements whose status is uncertain (such as possibility of stuck valves), enter those in the Status Elements tab. Darwin will have the freedom to adjust these as part of the calibration. 9) Create a new optimized calibration under the calibration study 10) In the Roughness tab, select the roughness groups to consider and enter the range of multipliers, to define the range that Darwin can adjust them. 11) In the Demand tab, select any demand adjustment groups that will be active, and their range. 12) In the Status tab, select the elements that Darwin will be able to adjust as part of the calibration 13) In the field Data tab, select which hydrant flow tests to consider in the calibration. 14) Compute the calibration run, review the results, adjust as necessary, then when done, click the export to scenario button.
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Forum Post: RE: GEMS project datafile not found
Hello Marc, So it sounds like you were able to locate the .MDB file? What happened when you tried importing it via File > Import > GEMS Project? What is your WaterCAD version number as seen under Help > About? Regarding Microsoft Access - the location of the repair option depends on the version of Access. In Office 365, it is under the File menu, where you will see a button for "Compact and Repair Database" Unfortunately it does not appear that your file has uploaded. Please try compressing the files into one zip file first, with a short file name, then try again. If you encounter a problem uploading, try a different browser (Internet Explorer, Edge, Chrome, Firefox, etc)
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Wiki Page: Catchment areas not coming in properly from InRoads model import.
Product(s): Bentley CivilStorm, Bentley SewerGEMS, Bentley StormCAD Version(s): 08.11.xx.xx Environment: N\A Area: Layout and Data Input Problem Catchment areas not coming in properly from InRoads model import. Solution This issue will occur when importing a model that doesn't have polygon areas in it. If there are no polygon areas that contain the rainfall runoff data, when the InRoads file in imported, the catchment will be assigned to the default X:Y coordinate. While this will be resolved in a future release of CivilStorm, the catchments will need to be manually moved to the proper location. All data will be associated with it though.
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