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  2. Hi all, I am not a constant user of GMS so I am often re-learning data processing techniques. I am looking for help with a procedure to accomplish the following objective. I have a 10 layer, steady state flow model of a coastal plain. The top layer predominantly represents a confining clay layer (material 1 in brown) with several small discontinuous regions where the underlying aquifer is exposed (material 2 in green) and some inactive regions (in red). Regions where the underlying aquifer are exposed have specified values for recharge (using polygon feature objects derived from shapefile). Other BC's are defined on the top layer: (CHD for ocean - in cyan; rivers in blue; drains appearing only in material 2 - not shown). I would like to specify a constant head in layer 1 equal to (TOP-1m) for every cell where clay is present but not interfere with other BCs subject to the following constraints: If (TOP -1) > BOT, Constant head = TOP - 1 Else Constant head = BOT + (TOP - BOT) * 0.1 Any help on a process for accomplishing this task would be greatly appreciated. Thanks Ted
  3. Jeremy, The recommended method for do that is to use a rating curve. You can use the populate tool to compute a level for any flow in the expected range of flows that will occur during a hydrograph. This avoids needed to worry about latency and attenuation of the flow from the inflow to the outflow. Alan
  4. Hello, I'm new to SMS and SRH-2D so I'm probably just doing something wrong. But I've set up and run a few models and then all of a sudden the program stopped producing results. It "runs" in 2 seconds, and when I try to load the results it gives me an error message "_XMDF.h5 solution not found" It's weird because it was running fine then all of a sudden stopped working. I even started over from scratch with a very simple constant Q model, and it's still not working. Any help would be appreciated. -Jeremy
  5. I am attempting to import a SEAWAT V4 model from USGS (This archive contains SEAWAT-2000 input and output files for the ground-water flow model described in USGS Scientific Investigations Report 2009-5039, "Simulation of groundwater flow in the Coastal Plain Aquifer System of Virginia" by C.E. Heywood and J.P. Pope.). The model runs to completion and the output is consistent with the report. The NAM file contains the VDF package for transport [I had to move the DATA(BINARY) records to the end as the translator didn't like them upfront to import the model]. The VDF package was not recognized during the import process. Any ideas for trouble shooting this problem? GMS 10.2.2 (64-bit) Build Date: Nov 14 2016 Registration info attached Ted vdf.nam
  6. Earlier
  7. Is there a way to set the downstream boundary condition to calculate a Normal Depth solution for an unsteady flow simulation? I saw the option to do so for Constant Flow, but not for a unsteady simulation. Thanks, Jeremy
  8. any ideas about the cause of this problem in the last layer of the model (in attached the figure)? i'm working in an unconfined aquifer (convertible layers) and saline intrusion. i think that this is a problem of boundary conditions, in particular in the top of the aquifer and in the bottom, but i m not sure. if you have suggestions it d be really helpful for me thanks Ilaria
  9. I want to know how do I get the drain results as a function of time. At the attached picture I show the Drain value for specific time step (the first one), but I want to get the full time series for that. Thanks, Imri Oz
  10. good afternoon, is it possibile to individualize the flow vectors (the arrows) in the domain of GMS ?(in attached an example to show what i mean..) Thanks
  11. Hi, Is there a way to obtain a time series of the variation of constituent concentration at a selected grid cell in MT3DMS? Thank you, Lalith
  12. ModelMechanic, Since you've been getting it to work with tutorial files it sounds like there is most likely something you overlooked in your model setup causing this issue. it would be hard to know more without seeing your model. It is possible that the software is having trouble with your specific files. If you think it may be a bug, reach out to support@aquaveo.com. They may be able to take a look at your files and determine if its a user error of a software error. -Ben
  13. I am not aware of the trouble with wall boundaries, but I am fairly certain that you cannot use these as an internal mesh boundary. The reference to using them along islands and channel banks assumes that there is a hole/void in the mesh that creates an external boundary.
  14. Here is the relationship from the manual:
  15. Hi, I think what you are trying to achieve could be done only aproximately, because you only have to assume what the head in the model will be. Anyway, for a given cell Qb = cb (hb - h), where Qb is the flow into the cell from the source cb is the conductance between external source and the cell hb is the head assigned to the external source and h is the model calculated head in the reference cell You problably have measured hb, so I would calculate cb this way: cb = Qb / (hb-h) But as I said, you can only assume what the value of h will be. Maybe calibrating the model against the measured flow could be a better practice.
  16. Hello Everyone I have a issue with defining inflow rate to related cells. I have the total volume of inflow for each month (i want make a time series general head), but i dont know how i should define the head of the 2 points of inflow line & amount of conductivity correctly. (for example the volume of inflow is 110 MCM & the length of inflow line is 97 KM and Average elevation of area is 1900 m) If anyone can help me it would be great.
  17. 我有一些關於沉澱的問題(bc)。 我想添加一個關於沉積物評級曲線的文件。 我閱讀了手冊並製作了RATING CURVE,但模擬顯示無法找到該文件。 我不知道我的文件格式是錯還是別的。 如果有人有參考示例,請提供給我或告訴我如何修復錯誤。
  18. I found out that Aquaveo is having trouble with wall boundaries, but they will not give me the fix because I am using the community version. Kind of lame, but I guess I'll make my own workaround.
  19. Hi folks, I have model developed in USG with the stream package setup (not the river or stream routing packages). I am having problems with the steady state model runs not presenting the simulated stream flow results back to the arcs in the coverage file. Setup, In layer one we have various streams arcs built into the model from the conceptual model methods as per usual. We have several known observation flow gaging station results whose data I have input as arcs and arc groups in the conceptual coverage file. Observed flow checked and observed flow rate entered plus the observed flow interval. These were assigned into the model through, map to modflow, as per normal methods. I have gone in the Modflow-USG observation file and generated the flow observations in the Generate PEST observation data. No problems with well using this method. I can see the entered data in the "FlowObservation" and "FlowSample" dialogs. I run the model and we do not receive the results of the simulated flows back in the coverages file. the simulated flow is zero at my specified observation flow targets. This is looking at the conceptual coverage stream file attributes. I know this is wrong because I can go into the model output file and check the stream nodes adjacent to the observed flow targets and I have results. I would like to fix this problem or get some feed back from others, because I would like to try and run this in PEST to calibrate conductance and other parameters etc... But if the simulated results are not reading I don't believe this will work in PEST. With in regular modflow tutorials I have no problem setting this up and getting simulated results back in the conceptual coverage stream file. Cheers,
  20. Hi all, I have simulated embankment in gssha. I have offset the embankment up to 0.5m over the land surface. However, in the result, the overland flow did not move over the embankment with the flood depth of more than 0.5m. I would like to know how to set the overland flow to flow over the embankment, while the flood depth is more than the embankment height. Thanks so much. Ratino
  21. Hi all, I have encountered the problem while running gssha model as follows: The error message stated that "The channel routing time step is getting really small less than 1/1000 of a second, reduce the model time step and/or MAX_CURRANT_NUMBER (default=0.4)". Please let me what the cause of the error and suggestion for solution. Thanks Ratino
  22. I had not seen that you can't use it internally. It seems odd because SMS says that wall boundaries can be used for islands and banks. See 8:03 in this youtube video:
  23. Hi all, I have encountered the problem while running gssha model as follows: The error message stated that "The channel routing time step is getting really small less than 1/1000 of a second, reduce the model time step and/or MAX_CURRANT_NUMBER (default=0.4)". Please let me what the cause of the error and suggestion for solution. Thanks Ratino
  24. Rob

    Converting 2D Meshes

    Thanks....v13 worked like a charm after I got my hands on it. I prefer interpolating surfaces in SMS than in ArcGIS b/c in my opinion, the results look better plus it is a lot quicker for me to generate and control how it is done in SMS
  25. I don't believe you can in 12.3 either. Can you not just convert the scatter points from the boat survey to a geotif in Arc? I am not sure about that either. Another possible solution is to check out QGIS, a free GIS software. I hope these answers help you.
  26. Rob, I don’t believe SMS 12.3 has the capability of converting to raster, someone correct me if I’m mistaken. I do happen to know that functionality was added to 13.0. In 13.0 you first convert the mesh to a scatter set by right-clicking on it and converting to scatter and then you right click on the scatter set and convert it to a raster. You can set the desired resolution and it will save out a geotiff. If you haven’t done so already, you could evaluate SMS 13.0 with a free trial and check it out. Or I’d also suggest looking into renewing your maintenance since 13.0 comes with some other useful features like improved LiDAR processing. calberts
  27. I'm in SMS 12.3 and was wondering if there was a way to convert a 2D mesh representing bathymetric surface elevations of a lake to a GeoTIF raster so that I can import it into ArcGIS for further analysis. Do I convert first to something else like a grid or scatter set? I created the mesh from first converting scatter points collected during a boat survey to the 2D mesh via linear interpolation. Thanks Rob
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