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  2. Hi all, I am attempting to carry out a lengthy sediment transport scenario that's 2952 hours (yikes). To have a bit more control of the results I thought to run it in roughly 1000 hr intervals. When I finished the first interval I thought all that would be necessary to continue evaluating the rate of deposition/erosion would be selecting the restart file (RST.dat) from the end of the previous simulation to start the next one. However, it seems the deposition/erosion process is not additive looking at the results from the end of the second interval. Does the restart file not contain the erosion values needed for the next simulation? Or maybe there is something else besides the restart file that I need to make this work? thanks, Isaac
  3. disgreen

    Deleting Depression Polygon Mask

    Chris, Thank you for looking into this. The paper you linked to is the one I referenced in my question, and unfortunately doesn't really clarify the meaning of the L parameter in the context of explicitly and spatially defined arcs. I'll likely use a value of 1 since both drawdown formulations have L in the denominator and because my tiles are explicitly defined. My guess is that GSSHA will either encounter an internal computational INF error or produce numerically unstable results if L is zero. Thanks again. I really appreciate your help. David
  4. 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
  5. Shahidul Islam

    Satellite image doesn't match with scatter data.

    Sir, Thank you for your reply. According to your given information, I loaded a dynamic map and saw that object projection is incorrect. I think, surveyor made a shift of co-ordinate. I came to know that, there is a different projection system for my country as it falls into two UTM zone. How can I add this new projection named BTM( Bangladesh Transverse Mercator) in SMS ? Projection Information is given below: Thanking you, Shahidul Islam.
  6. 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
  7. calberts

    Satellite image doesn't match with scatter data.

    Hi, It definitely looks like there is a projection issue with one of the pieces of data. Whenever I have similar issues, the first step I take is to locate which of the two is actually in the correct location. The easiest way to do this is to load in a dynamic map to provide a reference for where things are located. To load in a dynamic map, select "Add online maps" from the "Web" menu and choose "World Imagery" or "World Street map". SMS will display a dynamic map that updates when you pan around and zoom into the display. After you have located which one is correct, double check the specified projection on the one that is wrong by right clicking on it and checking the object projection. If the object projection of the object in the incorrect location seems correct, then more investigation is needed from the source of that data. Sometimes there are conversion factors such as a shift or scaling that must be applied, speaking to the surveyor or person that generated the data can sometimes clear that up. If after investigating the source of the data doesn't resolve the issue, then a trial and error process of manually shifting the data by applying either scale factors or X and Y shifts will be required. Most projections parameter fields that you can adjust within the projection (see below). -Cody
  8. disgreen

    Deleting Depression Polygon Mask

    Hi Chris, Thank you for the reply. Your answer makes complete sense and works. Also, I have a question about tile drainage networks as conceptualized in the SuperLink model. According to Downer et al. (2014) the drainage spacing defines the lateral distance between parallel pipes. This parameter is a bit odd considering that individual pipes are represented by unique arcs in WMS and GSSHA. Does specifying a non-zero drainage spacing in WMS implicitly place additional pipes parallel to the primary pipe at the specified spacing, or does this parameter place pipes perpendicular to the primary pipe at the specified interval? Or, neither? Should I start a new topic, or can this be answered in this thread? Thanks again for all of your help. David
  9. T_dudunake

    Importing XYZ data and attribute (pressure)

    Hi Michal, Thanks for your response. I actually just have a gridded point dataset. I was wondering if the best option would be to convert it to a raster. Otherwise, if I can keep this dataset as a gridded point dataset, then that's one less data processing step which is fine by me. What I'm modeling here (theoretically) is hyporheic exchange on the surface and subsurface of a stream bed. Once I run MODFLOW I will generate flow paths to visualize the hyporheic exchange. What you see in the above screenshot is one longitudinal section of the entire dataset with three distinct locations which represent a boulder on the surface of the bed. In the full data set, I have surface observations regularly spaced at 5mm with an observed location (XYZ) and a modeled pressure value from a flume for every single observation. Note, it is a complete 3D data set. I am able to bring in this dataset as a shapefile then convert it to a feature object (is this a good next step?). My next big hurdle I'm facing is snapping these observation points to a grid cell center where I want one observation point per grid cell (5mm resolution). Can you provide some insight into how I might do that and then assign each grid cell the respective pressure value for that point?
  10. Sean Czarniecki

    Changes to MODFLOW-USG?

  11. Kanchana

    RT3D Na MODFLOW Animations

    Hi, Could someone please tell me how to save the animation created for displaying a simulation (Display-Animate) for future uses? I am using GMS 10.3.2 Many Thanks!
  12. Michal

    Changes to MODFLOW-USG?

    It may be a long shot as I dont have much details about the model itself, but there might have been some changes in the default values for the solver between MF versions.
  13. Michal

    Importing XYZ data and attribute (pressure)

    If I understand it right, you have raster dataset of measured heads and you basicaly want your model to reproduce these as close as possible. Why not just convert the raster data to points a treat each point as observation point? Then you can formulate the inversion problem as usual.
  14. Michal

    How to import/read a binary *.hds file?

    Hello, what kind of errors are there during the check? If you were able to load the simulation into gms, you should also be able to read the solution. Try right clicking on the simulation (MODFLOW in the project tree) and select Read Solution command. Then just select the modflow name file and the binary data should load.
  15. Dear All: I have a problem related to use WMS for building the bathymetry of Ce-Qual-W2. I closely followed the tutoiral :http://wmstutorials-10.0.aquaveo.com/35%20WaterQualityModeling-CEQUALW2.pdf. The problem is : 1. For 6.2 Create Branches, I want to only build one branch for my research area. After I created branch coverage, should I also right-click on the “Branch” coverage and select Build Polygon? When I do like this, the wms was crashed (I tested several times). 2. If I didn't build the polygon for my branch, I can continue to build the segment. However, when I finished building the segment and want to do the 8.2 "Branch Identification", the computer crashed again when I select CE-QUAL-W2 | Map Segments ↔ Branches. Could anyone help me find a reason for these two crashes? What I do is closely followed the steps in the tutorial. The bathymetry and the segments are attached below. Note, I deselect the Triangles in the display option. Many thanks and look forward for the reply! Best Cheers Chenxi
  16. I have downloaded a georeferenced satellite image from USGS earth explorer website. I opened both the satellite image and scatter data in SMS and made same projection for each. But, they were in different location as shown in picture below. How can I fix this issue?
  17. Hello, I am new to using MODFLOW and GMS and I have a previously calibrated model (GW Vistas) and the model files are in native MODFLOW files. I imported those files in GMS and the "check simulation" generated several errors and warnings. The model runs fine using the command line with the USGS MODFLOW executable. I am trying to see if I can just read the *.hds file created while executing the model using command line. Is there a way to just load the *.hds and draw down file and view the results in GMS? Any help would be appreciated.
  18. 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
  19. Alan Lemon

    Dual domain mass transport

    The Active Dataset Time Series plot will give you the values at selected cells for a particular dataset. Is this what you are looking for? Alternatively, you can right click on the dataset and export it to a text format.
  20. Ellis Symons

    Model over-topping near seashore

    Hi Fahad, Tidal or ocean boundaries are usually represented by an HT boundary that spans along the ocean for the width of the model. The boundary should extend up to an elevation at least equal to the boundary water level. If you have any further TUFLOW related questions please don't hesitate to email support@tuflow.com Kind regards, Ellis
  21. Hi, I'm relatively new to the GMS software and have performed a few of the basic tutorials Aquaveo provides. I have XYZ data that provides spatial reference to every observed pressure points/head values. These points are evenly spaced/gridded. I would like to create a MODFLOW simulation with these pressure data. To my understanding, the best way about creating this model would be to generate a raster that stores XYZ and P data (GeoTIFF). Theoretically, I'd like to create a 3D grid that stores these X, Y, Z, and P data. From there I'm going to need to create an IBOUND layer that specifies the head based on the P value. I've successfully performed these simulations in 2D space but am unable to comprehend where to start in the 3D space. See the attached screenshot for an example of a longitudinal cross-section of a 2D simulation. Can someone provide me some insight on how to begin setting up this model? Let me know if there are further things I need to clarify.
  22. kpham89

    Dual domain mass transport

    Thanks for the reply, Alan. Is there a way to extract sorbed and regular concentrations for all the time steps? I know how to click on the individual timestep and export concentrations that way but not sure if there is a more efficient way to obtain all the timestep concentrations in a file.
  23. Alan Lemon

    Output with immobile (sorbed) concentration

    see the answer here
  24. Alan Lemon

    Dual domain mass transport

    These are really old forum posts and I believe that this feature was implemented after these questions. If you run the "dual domain" part of this tutorial you will see that the sorbed concentration is read into GMS as part of the MT3D solution. http://gmstutorials-10.3.aquaveo.com/MT3DMS-AdvancedTransport.pdf
  25. Earlier
  26. Hi everyone, My study area for a TUFLOW 2D simulation is given below. The red arrows indicates ocean and yellow arrows are for river. I have water level vs time data for both of the side. For the river I can easily draw a BC to represent the flow. But how should I model the BC at the ocean side. Should I draw a big arc acorss the ocean side to represent the BC?
  27. kpham89

    Dual domain mass transport

    Hi Kathy, I am looking for the same thing. Did you ever figure it out?
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