Jump to content
GMS, SMS, and WMS User Forum

Chris Smemoe

WMS Development Team
  • Content count

    362
  • Joined

  • Last visited

  • Days Won

    2

Everything posted by Chris Smemoe

  1. Chris Smemoe

    Deleting Depression Polygon Mask

    David, That's a good question, and I don't fully understand the answer right now. I do know that it is only used for tile drains and doesn't apply if you're modeling normal underground drain pipes (storm sewers). I talked to the original programmer (Nawa) about it and understood the answer at one point, but the complete answer has left my mind. I asked Chuck Downer, the writer of GSSHA about it and here's what he says: "It has to do with the assumed shape of the curve for the water surface flowing into the pipes, assuming you are doing drains. It doesn't actually add pipes. It comes from the two pipe drain models that in GSSHA, Cooke and DrainMod. Those are computations for the pipes only. Those methods are described in that report. Since GSSHA is integrated the ground water surface is being computed, so I guess you don't really need this in GSSHA but we'd have to re-derive a formula. These are standard formulas. I don't know how sensitive the model is to the parameter. It might not matter a lot. I don't think you can put zero. I'd say if there is some pipe spacing in the fields just use that. Typically there is. Otherwise, probably make it on the larger side." I found a Technical Release paper describing this "L" parameter in some detail here: https://www.researchgate.net/publication/268076111_Modeling_Subsurface_Storm_and_Tile_Drain_Systems_in_GSSHA_with_SUPERLINK (This may be the same paper you were referring to above) So my understanding is that you would put your pipes in the GSSHA Storm Drain coverage where they actually exist and then enter an approximate spacing of the pipes in this "Drain spacing" field. Chris
  2. Chris Smemoe

    Problems when building the bathymetry for Ce-Qual-W2

    Chenxi, You need polygons in your branch coverage (as well as your segment coverage), so you need to get the build polygons command working before you can map segments to branches. Try cleaning all the arcs in your branch coverage (Feature Objects | Clean) before building polygons and see if that fixes your problem. Also make sure you don't have any duplicate arcs by dragging a box around your entire branch coverage and deleting any arcs that are not needed to define the boundary of the water body. If these steps don't fix the problem, I'd recommend sending your files to the Aquaveo tech support team if possible and let them have a look at the issue and see if they can figure out the problem. Let me know if you have any additional questions. Chris
  3. Chris Smemoe

    Deleting Depression Polygon Mask

    David, You can have multiple GSSHA coverages and multiple GSSHA models in your WMS project. I'd recommend duplicating your existing GSSHA model (just right-click on your GSSHA model). Then duplicate your GSSHA coverage and delete any depression polygons in this coverage. Then assign the GSSHA coverage with the deleted polygons to your model. You should be able to run cleandam with the coverage/model containing the deleted polygons and it should not include any depression cells in your cleandam run (all the cells should be filled). Let me know if you have any other problems. Chris
  4. Chris Smemoe

    GSSHA - Long-term with GAR infiltration & Penman ET

    Joel, Here's a message from the GSSHA developer, Chuck Downer: It's pretty hard to say why he is not getting any ET. If he is in perpetual event mode, there is going to be little or no ET because ET will not occur in a cell that has any rainfall in it. So if he has some period that has constant rain, then the ET is going to be close to zero, and I can see no reason why that is not correct. Also, if his soil moistures were very low for some reason, below wilting point, he would get no ET. Other than that, it's hard to say based on the input. He can capture the effects of a perched water table, more or less, by using the multi-layer G&A model, and can specify the layer depths and the vertical hydraulic conductivity of the layers. If he puts a low permeability layer in there, the water will perch above, it won't move laterally of course. From the sounds of it, he probably wants to do this. If he uses GAR his SOIL_LAYER_DEPTH should be less than the impermeable layer depth, the top layer depth is typically a calibration parameter, as is the soil layer depth. If you use MLGA, you don't have to worry with these. Hope this helps, Chris
  5. Chris Smemoe

    GSSHA - Long-term with GAR infiltration & Penman ET

    Joel, I answered a question in another post. The answer to this question is that it's hard to answer without seeing your model. You can make sure you have good starting values for all the evapotranspiration parameters in your model. I'd recommend the GSSHA course or contacting tech support with your model as I described in your other post. Let me know if you have any other questions. Chris
  6. Joel, I don't have an immediate answer to your question off the top of my head. I'd recommend contacting tech support to see if they can help you with your specific questions. Their contact information is here: https://www.aquaveo.com/technical-support If you could provide a copy of your model to tech support and explain the specific problem you're having, that would be best. With specific engineering-related questions, consulting is available at an additional charge. There are 2 good resources for answering GSSHA-specific questions. The first is the GSSHA wiki, located at https://gsshawiki.com Also notice on the GSSHA wiki web site that a training course is being offered next month in Alabama. This 2-day course is offered free of charge if there are still seats available. You would need to provide your own time, lodging, and transportation to the course. I think this is a great opportunity to discuss any problems you have with the GSSHA developers and to get to know them. Contact information for the course is on gsshawiki.com. This would be a good use of your time and you would get to know other people using GSSHA for their projects. Let me know if you have any other questions, Chris
  7. Chris Smemoe

    Format of GSSHA.dep file

    David, The .dep file just has water depth solution values for each of the cells for each output time step. I don't know that the file format is documented anywhere, but maybe I can try to track something down if you need me to. The important values you would use if you were reading this file are the number of cells in the model, which is in the "ND" card at the top of the file, the name of the dataset (NAME card), whether each cell is active/inactive (these values do not change for each time step), and the solution values for each cell (these values DO change for each time step). It's just a text file, so you can open the file in a text editor and look at it to see what I'm talking about. The active/inactive and the solution values are for each cell (based on the cell ID) and you cannot determine the actual location with just this file. The values are listed in the .dep file in the order of the cell ID's. If you have the location of the center of the upper left cell of your grid and you know the number of rows and columns in your grid, you can determine the location of the center of any other cell from the cell ID. The cells are numbered starting from the upper left corner of the grid. Let me know if you have any other questions. Chris
  8. Chris Smemoe

    Converting GIS Point Features Into Gaging Stations

    David, I looked at the documentation for gages in WMS and I'm afraid it's not very helpful. There are 2 types of gages in WMS: Rain gages and monitoring gages. You can convert a shapefile to rain gages in a "Rain Gage" coverage but there's no way to directly convert a shapefile to monitoring gages. However, there is a monitoring gage file format that you can import into WMS in the Gages dialog. Here's a sample file: GAGE BEGGAG NAM Gage1 LOC 1.000000 1.000000 0.000000 DIR 0.000000 1.000000 0.000000 COL 0 0 255 BEGGAG NAM Gage2 LOC 10.000000 10.000000 0.000000 DIR 0.000000 1.000000 0.000000 COL 0 0 255 BEGGAG NAM Gage3 LOC 20.000000 20.000000 0.000000 DIR 0.000000 1.000000 0.000000 COL 0 0 255 The "BEGGAG" line tells WMS to create a new gage. The "NAM" line is the name of the gage and the "LOC" line is the X Y Z location of the gage. You could just export the XYZ points from a shapefile to a text file and modify the file to include the necessary lines to import as a gage file. The only thing you might want to change in this file (besides the location and name) is the "COL" card. This is the Red, Green, and Blue color for the gage. The "DIR" isn't really used in WMS. To import this file, just go to the 2D grid module and select Data | Gages from the menus. It's also accessible from the "Select Monitoring Gage" tool. Select import from the Gages dialog and read your file. You could also just create a bunch of new gages in the Gages dialog and copy/paste your XYZ values into the dialog spreadsheet. Let me know if I can help with anything else. Chris
  9. Chris Smemoe

    Where can I find best DEM data?

    Omar, Google Earth probably uses USGS or possibly their own proprietary data source for their elevation data, but you can't use their elevation data inside WMS. If you're in the United States, the United States NED 10m data is a better source than the SRTM 3 arc-second data. If you're outside the US, I have found the ASTER GDEM v2 Worldwide Elevation data (1 arc-second) to be more accurate than the SRTM 3 arc-second data (but it's still not really great data). You can access this ASTER data from inside WMS using the following steps: 1. Select the Get Data from Map menu item or button. 2. Define your data bounds using the map locator and hit OK. 3. Select the Advanced button at the top of the Data Service Options dialog. 4. Under Popular Sources or Terrain Data, select "ASTER GDEM v2 Worldwide Elevation Data (1 arc-second)" and click Connect. 5. Define a filename to download your data and click Save. Your data will be downloaded and loaded into WMS. Right-click on the .tif file in the WMS project explorer and there's an option to convert it to a DEM. Once it's a DEM, you can use it for watershed delineation. Note that the upcoming verison of WMS (11.0) will have an option to download the best resolution elevation data for your area for anywhere in the world, whether inside or outside the US. Let me know if you have any other questions. Chris
  10. Chris Smemoe

    GSSHA long-term simulation

    Vaclav, GSSHA will allow you to have periods of precipitation with nodata values, but I'm not sure there's an easy way to define this information directly in WMS without editing the GSSHA .gag (rain gage) file. WMS writes the rain gage (.gag) file, but WMS has limited capability for editing and creating this file. There's a program called the "Time Series Editor" that's distributed with WMS that has additional capabilities for editing GSSHA rain gage information. More information about the rain gage file used with GSSHA is located on the GSSHA wiki here: https://gsshawiki.com/Precipitation:Spatially_and_Temporally_Varied_Precipitation You can manually edit this file as needed to provide GSSHA with the needed rain gage information. I'd recommend keeping a backup of the file if you manually edit it so it doesn't get changed by WMS or the Time Series Editor programs and you can always revert to your backup if needed. Let me know if you have further questions. Chris
  11. Chris Smemoe

    WMS 10.1

    The CAD menu was removed from WMS 10.1. The CAD menu options can now be accessed by right-clicking on the CAD data in the project explorer window. Let me know if you have any other questions. Chris
  12. Chris Smemoe

    GSSHA long-term simulation

    Vaclav David, Just looking at your screen, there are 2 things I can think of that might possibly be incorrect in your model. One possibility is that you are trying to run a storm drain model without having defined channel routing in your model. There was a bug in GSSHA that was recently fixed where if you tried to run storm/tile drains without channel routing defined GSSHA crashed. This has been fixed if you download the latest gssha.exe from http://gsshawiki.com. Another possibility is that your GSSHA output window states that there was an error encountered in the hmet_WES file. This is your HMET file used in your long term simulation. You should probably attempt to fix this error and see if this fixes the problem. I believe sample files are located on gsshawiki.com and there are some sample files in the long-term modeling example from the WMS tutorials. You could also contact our Tech support department with your files if you have a current maintenance contract for WMS. Let me know if I can be of further assistance. Chris
  13. Chris Smemoe

    Diverting a Drainage Path

    Mike, I just saw this and you have some strange things happening. If you still have the files and get a chance, it would be nice if you could contact support@aquaveo.com or call them with your files so we can see what's wrong with importing your flow directions. Thanks, Chris
  14. Chris Smemoe

    Routing Data

    Joe, Thank you for your input. I think this is a good suggestion and would not be difficult to do. I added it to our task list. In the mean time, there is a "filter" tab that's available when you are in the cross section attributes dialog. This tool allows you to reduce the number of points in your cross section to a certain number of points based on certain criteria. Chris
  15. Chris Smemoe

    Importing Survey Data

    Joe, You should be able to get survey data into WMS. Here's what I do to get it into WMS: 1. Select FIle | Open and select the .csv file. Here's my sample .csv file: 1, 1, 2 2, 2, 3 1, 2, 4 2, 3, 5 2. In the dialog that pops up, use the defaults and select "Next" 3. Under "WMS Data Type", select "Survey Data", then Finish. 4. This brings your data into WMS as TIN vertices. If you have vertices turned off, you won't see anything. To triangulate your vertices and show contours, select TIN | Triangles | Triangulate from the Terrain Data Module menus. You will see the triangles and contours. Let me know if you need anything else, Chris
  16. Chris Smemoe

    Routing Data

    Joe, There is no way to extract cross section information for the Muskingum Cunge method directly from a 1D Hyd cross section database. You can copy/paste the values from a spreadsheet into the appropriate tables in the HEC-1 interface. There is a reservoir routing tool that allows you to create a storage-outflow curve for an HEC-1 or an HMS model. I think the HMS tutorial describes how to use this tool. Let me know if you have any other questions. Chris
  17. Chris Smemoe

    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
  18. Chris Smemoe

    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
  19. Chris Smemoe

    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
  20. Chris Smemoe

    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
  21. Chris Smemoe

    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
  22. 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
  23. Chris Smemoe

    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
  24. Chris Smemoe

    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.
  25. Chris Smemoe

    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.
×