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Chris Smemoe

WMS Development Team
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Chris Smemoe last won the day on March 1 2011

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About Chris Smemoe

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    WMS Development Team Leader

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    Provo, UT

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  1. The time step must be an integer divisible into 60

    Hi, Your comment sounds correct. If you are able to run GSSHA without errors, you can probably ignore the model checker output. Chris
  2. Static Tools

    Tamim, Thank you for reporting your issues on the forum. We sometimes run into these issues and we are usually able to help fix the problem with either a patch to the WMS software or are able to find a way to get your current version working. One thing you could try off the top of my head is to go to the Edit | Preferences menu command and select the "Graphics" tab. Select the "Software" graphics option, click OK, and restart WMS. See if you're still having the same problems. If you are, I'd recommend contacting tech support. They may be able to duplicate your problem using your files on one of our Aquaveo computers and we could get the problem worked out in the software. Chris
  3. CE-QUAL-W2 - what am I missing?

    Simon, Cody is right...you just need to have a branch and a segment coverage as described in the tutorial. Both coverages need to be topologically correct. This means that there are no intersecting arcs that don't have a node at the intersection and that any intersections snap correctly at a single node. The basic feature objects and the TIN tutorials are listed as prerequisites for the W2 tutorial and I'd definitely recommend going through these so you become familiar with basic feature object creation in WMS. I'd also run the W2 tutorial at least up to section 9 so you know how to setup geometry for a W2 model using the WMS interface. I will say that the strong point in WMS is creating a bathymetry file. After you've created the bathymetry file, it might be more efficient to switch over to the GUI that comes with CE-QUAL-W2 and use your bathymetry file with that interface to finalize your model. You could also finalize and write out the model using WMS, but the file format for the W2 model exported from WMS will not necessarily correspond to the most recent version of W2. Chris
  4. Diverting a Drainage Path

    Mike, What Cody recommends is a good solution. I would add that sometimes TOPAZ won't change the flow path even if you edit the elevations, so you might need to change the elevations of several cells around where you want the flow path to change to make it obvious to TOPAZ where you want the flow to go. You can edit individual DEM cell elevations by double-clicking on the DEM points as needed. But I'd try Cody's approach of adding a single arc first and see what TOPAZ gives you. Chris
  5. Curve Number

    Lalith, Your curve number report should show each of your basins with a list of the land use/soil type combinations and how the curve number was computed. In your drainage coverage, have you assigned a "Drainage boundary" type to the polygons? Do you have streams in your drainage coverage so an outlet is assigned to the downstream point on your stream? Have you converted to soil/land use data to coverages in the map module of WMS or are you using the shapefiles directly? If you have converted the soil/land use shapefiles to coverages, do polygons exist in this coverage and are the correct ID's (land use ID's and soil group letters-A, B, C, or D) assigned to the coverages? If you are using the shapefiles, are you using the correct fields to represent soil groups and land use ID's? Do the shapefiles or map land use and soil data overlay your watershed sub-basins? Are you using the most recent version of WMS 10.1? If you are doing these things, you should be getting results. If you are not, there may be something else wrong and I'd recommend contacting tech support. Hope this helps, Chris
  6. W Beck, Regarding question 1, you might try using the HEC-RAS program itself to visualize the water surface elevations at each of the cross sections in a 3-D view. There's an option in HEC-RAS to view the cross sections in an X-Y-Z perspective plot. This shows all the cross sections in your model along with the RAS-computed water surface elevations at each cross section. This plot should give you a good idea where your water surface elevations are in relation to the channel banks. You can also look at each individual cross section in your model and RAS will show you the computed water surface elevation on the cross section plot. Regarding questions 2 and 3, when you read a HEC-RAS solution into WMS, WMS just uses the water surface elevations computed by HEC-RAS and places a single water surface elevation (WSE) point at the intersection of each cross section with the stream centerline. Normally, you would run a linear interpolation between water surface elevation points along the centerline to get additional WSE points between cross sections. Then you would create additional WSE points along each cross section to increase the density of WSE points and improve your floodplain delineation results. WMS basically just subtracts the ground elevations assigned to your TIN from the WSE point elevations assigned to your 2D scatter set to get your water depths in your floodplain. In your case, you merged surveyed cross sections into your WMS-extracted cross sections, so your TIN elevations do not match your actual cross section elevations used in HEC-RAS. The Flood Depth (_fd) contours displayed in WMS subtract the ground elevations on the TIN from the HEC-RAS computed results, so if the TIN elevations contain the channel, water depths will be displayed in the channel. Further, if any RAS-computed water surface elevations are higher than your TIN ground elevations, there will be flood depths at these locations. Hope this helps somehow, Chris
  7. Error when trying to get map data

    UPDATE: The best solution to this problem is to download the latest version of WMS 10.1 here: https://www.aquaveo.com/downloads I'll update the links, but the patch listed below may stop working. I just want to post an update to this original problem. I've updated the files to be placed in your "Program Files\WMS 10.1 64-bit" directory to fix this problem. The new update uses the Google Maps API and does not bother you about updating the registry if you're not able to update the registry the first time running the application. This is our long-term solution to the problem and the update will probably not change from here. You can still wait until WMS is updated and install the update or just put the updated files in your directory. The updated files can be downloaded here: https://filecloud.aquaveo.com/index.php/s/L2SNSvbqMC0RfUV You need the password for the update, which is "vearth". Let me know if you have any further questions about this issue. Chris
  8. Can SWMM routing the Channel inside a basin ?

    I'm not a SWMM expert, but there is no way to handle channel routing inside a basin that I can think of. When using the interface in WMS, I think you need an outlet point to build your model and export it to the SWMM model.
  9. Creat Model of Exprimental Watershed(chow 1974)

    Are you delineating the watershed using a TIN? This option is not recommended and is not really tested anymore, so it is not supported. The error message means you can't create a max flow distance arc for your watershed without a DEM. If you don't need this max flow distance arc for computing Tc, you should be OK.
  10. Creat Model of Exprimental Watershed(chow 1974)

    The most accepted way of computing the Tc for use with the Rational method is a method where you define the longest flow path in your basin and then divide your flow path into 3 separate equations: one segment for sheet flow (usually about the first 30 meters or so) one segment for shallow concentrated flow (where the flow does not combine into a channel) and one segment for channel flow. That's probably what was used to compute the Tc values in that tutorial. There's a tutorial called "Time of Concentration Calculations and Computing a Composite CN" that should help you with computing a Tc using this method. Hope this helps, Chris
  11. Creat Model of Exprimental Watershed(chow 1974)

    Aghamiri, I'm not sure I completely understand your questions. But it seems that you're asking a couple of things: 1. Do I have to have a TIN or DEM to build a WMS model? No, you can build a model with or without elevation data. There are tutorials describing how to model a watershed using feature objects (the title of this tutorial is "Advanced Feature Objects" on our learning center) and you can build a hydrologic tree manually in the Hydrologic Modeling module of WMS by just selecting options to add outlets or basins and then defining the data for these outlets and basins. 2. Can I automate hydrologic model runs using a script or some programming language? No, this capability does not currently exist in WMS. There are commands in WMS (the "Stochastic Modeling" commands) to automate several hydrologic runs, but there is no way to control WMS using an external script. Hope this helps, Chris
  12. just HEC-1 has weighting precipitation gage

    Aghamiri, HMS also has an option to define weighted gage rainfall, and WMS helps build HMS models also. When you define your gages for a basin, you define gage weights for that basin. Each gage has a total rainfall. The total basin rainfall is determined from each gage's rainfall value and the weights for the basin. You should have at least one gage with a distribution. Hope this helps, Chris
  13. Error when trying to get map data

    Nick, UPDATE: The best solution to this problem is to download the latest version of WMS 10.1 here: https://www.aquaveo.com/downloads I'll update the links, but the patch listed below may stop working. A patch with the fix can be downloaded here: https://filecloud.aquaveo.com/index.php/s/L2SNSvbqMC0RfUV You may need the password "vearth" (Case sensitive) to access the file. You should unzip all the files to your "C:\Program Files\WMS 10.1 64-bit" directory, replacing any files already in that directory with the new files. You will need admin permissions to copy the files here. The first time you bring up the Map locator tool in WMS, you will be prompted to edit your registry. Just hit OK/Yes to any messages that pop up. The map locator just needs to update a registry setting to use the latest map browser control in the virtual earth map locator. After that, you can click on the button again and everything should work correctly. Let me know if you have any further questions or problems. If you want to wait until the next update to WMS, you can do that. We'll try to get an update to WMS out in the next couple of weeks. Thanks, Chris
  14. Error when trying to get map data

    Nick, Sorry about the problems you are having. Unfortunately, there's not a quick fix. Microsoft removed their old virtual earth servers without notification. We are working on a fix and hope to get a fix to you and others soon. I will post to this thread as soon as I have a fix for this issue. I know this is a problem if you're used to getting data from the WMS web map button. In the mean time, you can download data as needed from internet web sites and read any data into WMS. Once you get any georeferenced data from the internet or some other source into WMS, you can use the "Get Data" tool from the top of the WMS window to download data as needed directly into WMS. This Get Data tool will allow you to bypass the Virtual Earth Map Locator window that's not working. Let me know if that doesn't make sense. Chris
  15. Import HEC-HMS to WMS

    WMS does not currently have the option to import an HMS file. If you have an HEC-1 file, you can read this into WMS using the HEC-1 menu. There is no reason we could not support an option to import an HMS file, and I have added this request to our list of tasks, but implementing the option to fully import an HMS file will take some time. Your only option right now, if you want to get it into WMS, would be to try to duplicate the model in the WMS interface. Chris
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