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amy last won the day on March 13 2011

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  1. Dear Alan, thanks for your reply. Unfortunately, following your suggestion I am not able to view the date by loading the project (the date is not saved in time control tab, appearing the default value, and it appears "Date: unknown" in tidal/harmonics tab). When contacting Aquaveo technical support, I was informed that after saving and reopening the project, this date is not displayed. They mentioned that, if I want to confirm that I have the correct dates for the constituents, the only way is to re-extract the constituent information and doing trial and error on the date until getting exactly the same values for the amplitude and phases (they are visible) for all the nodes at the ocean boundary. This is a time consuming solution that does not make much sense in my opinion. This is a problematic situation when a SMS project is given to us and we have no idea about the period of the year to which the simulation results correspond. Amy
  2. I have a SMS project using ADCIRC and astronomic forcing alone. The ADCIRC model control indicates the length of the simulation (simulation starts: 0 days and simulation ends: 15 days), however I cannot find the information referred to the exact period of the year for which the values of the astronomical constituents were extracted (from the Le Provost database). The tidal/harmonics tab at ADCIRC model control presents the indication: "date unknown". Where can I find that information? I could not find it in fort.15 file. I believe that those dates should be written somewhere. Thank you. Amy
  3. Dear all, after running a tuflow simulation (SMS 11.1.6, 32 bit), the flood extents look fine, but water levels minimum and maximum are zero. Does it make any sense? Did the same happen to you? Thank you. Amy
  4. Hi Raiphe, When I do the steps below, SMS crashes, and the same happens if I try to create the shapefile using depth instead of water level. Steps: - with the project already open, open the mesh data (file *.xmdf); - highlight water level; - menu data/zonal classification; - on the classification wizard window: on the zones menu click new; on the options menu leave on only the 'create merged coverage'; on the criteria list menu click new, highlight water level, click between, 0m-50m, timestep 6 20:00:00, ok. However, I found that if I use the option "Greater than" instead of "Between", I can create the shape file. Does it make any sense? Do you still want me to send you the files? Thanks. Amy
  5. Hi, I am using SMS 11.1.6 (32 bit) and 11.1.8 (64 bit) versions and, unlike when using previous versions, I am not able to use the zonal classification feature. The software crashes, indicating to report a bug. How can I overcome the problem? Is the bug being fixed? I need to extract the shape file of the wet front resulting from the simulation. Thanks for your help. Amy
  6. Alan, I just added the file Amy_nc_files.zip to your ftp site. It contains 4 .nc files. Each file has the daily information about 2 variables: sea level pressure and wind data (u and v). This is another thing I have to overcome since the files I used in the past used to have those variables in separate files, which were easier to insert in the appropriate field at the ADCIRC model control. Thank you for your help. Amy
  7. Thank you Alan for your prompt reply. On fact I use to interpolate the pressure and wind values to the mesh. Both wind and pressure files are .nc files. Regards, Amy
  8. Hi, I have several pressure files in scatter data corresponding each file to 1 day of the year (instead of having 1 file with the pressure information for all the year). In ADCIRC model control, when selecting NWS=5 and the pressure dataset, I can only select 1 pressure file, i.e. corresponding to 1 day. How can I overcome this? The idea is to use the pressure information along the time/days in my simulation, which occurs for several days. Is it mandatory to put all the pressure data (in scatter) in 1 file? Thank you. Amy
  9. Good morning Alan, I am glad to inform you that with your last suggestions the problem was solved; I was able to get the model to run without instabilities. Thank you very much for all your suggestions and your support. Amelia
  10. Thank you Alan for all your suggestions. Regarding your last question, during the run, the model warns about some instabilities in a shoreward cell, but the burst I've managed to see in the animation occurs in one of the extremities of the wave maker. I just uploaded the project files (Amelia_Boussinesq.zip) to your FTP site. I will be grateful if you can have a look at the project. Thanks. Amelia
  11. Alan, The principal wave direction is 0ยบ (shore normal projection), and I have damping layers on the sides too (40m with a coefficient of 1.0). I have smoothed the entire grid with the the respective model tool, with several iterations. After that, I had to modify the grid manually in the harbour structures, in order to keep them above water. Next, I've performed a single smooth grid iteration near the coastline to avoid the abrupt changes (I have also tried to run the model without these last steps - with submerse harbour structures - but still no good results for larger durations) Thank you. Amelia
  12. Alan, Thank you for your quick answer. I have an internal wavemaker that covers the entire column. Behind it, I already had a 100m damping layer with a coefficient of 0.9. I performed another test increasing the layer to 300m and changing the coefficent to 1.0 and still no good results were obtained for 1700s. The wave maker is 1900m far from shore. Do you have any further suggestions, or is it better I send you the project to give a look at? Thank you, once again. Amelia
  13. Hello. I am experiencing some instabilities while running BOUSS-2d on 3500*2300 (m) grid with 10*10 (m) cells. I've managed to make a successful run with a test: small duration (400s). When I set the model to run for longer periods (1700s - still below the recommended duration), the model generates the aforementioned instabilities. I have managed to select a time window for the animation that allowed me to see what happened: the model was working fine, and then it appears a huge burst near one of the extremities of the wavemaker, stopping the model. Trying to solve this, I lowered the time step in order to decrease the Courant number, set the grid in order to keep the wavemaker at a constant elevation, then performing a grid smooth to avoid abrupt elevation changes. None of these actions managed to overcome the instabilities. Do you have any suggestions to what is causing this and how can I solve it? Thank you in advance. Best regards, Amelia
  14. amy

    Modifying a mesh

    Hi, In my case, I am calibrating a model (ADCIRC) using a mesh, wich does not include a breakwater because I am using bathymetry, WSE and velocity data aquired before building the breakwater. Then, I want to use the calibrated model, with exactly the same mesh, except including modifications just to account the breakwater, for a later simulation. Is there other option than the 3rd one you mentioned? I am cheking your Lesson 4 "ADCIRC Mesh Editing and Parameters", however it seems not to work in my case, because the breakwater (island). Thanks. Amy
  15. Hi, I am using RMA2 in SMS 11.0.03 for simulating a flood in a river/ estuary. I am facing two problems: 1- In the calibration process, I would like to simulate during 12 days, including 1 spring tide and 1 neap tide. I go from 6m to 2.99m (first value of the tide, starting with neap tide) using the steering and then I use that hotstart for the unsteady simulation (with wet/dry option). The problem is that the simulation allways stop after simulating the first 6 days, i.e., when starting the spring tide. I verifyed that I have abrupt high velocity values in a sand bank (1 or 2 nodes) and because of that Rma2 immediatly stops. I tryed to increase the E viscosity form 10,000 to 30,000 but I stil get problems. Any sugestion? Is it convenient to start by the spring tide cicle? I am creating hotstarts every 150 iterations. Is it possible to use the iteration, in the hotstart, corresponding to the first e.g. 5 days (the velocities were ok) and then changing the conditions for the remaining days of the simulation e.g. E viscosity, wet/dry versus marsh porosity, time step, etc. I tryed some oh those and the Rma2 stops a few minutes after. 2- For simulating the flood, I have to start form 22m (instead of 6m). The problem is to go from 22m to 2.99m, since the steering allways stops. Any idea? From your experience, all help and suggestions are wellcome. Thank you very much. Amy
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