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Found 5 results

  1. I have a number of geological layers as TINs. They are situated at their respective depths yet when I attempt to highlight them all and convert to solid or UGRID they create multiple grids (or solids) for each layer (TIN). As I am new to the MODFLOW package, what is the simplest process for turning TINs (some do not cover the entire extent of the model) into a 3D block to model groundwater flow via particle tracking. I have attempted fill between tins and horizons, however, nearly all solids appear as below, mishapen and not extruding between the TINs as expected.
  2. I'm trying to find a suitable work around for modelling flow pathways through abandoned mineworkings, some of which are above the water table (dry) and therefore subject to non-darcian flows. My data, however, is a blanket of worked seams and lacking any tunnel or shaft data (the hope was to use CLN utilising this network data). I am hoping someone may have some experience with battling similar issues? The data is all vector data used in ArcMap and I've noticed that some files will transfer into MODFLOW easily (such as DTMs), yet others like TINS do not. During the initial process, I have a few questions I hope someone with more experience may be able to answer. 1) How to site the workings at their respective heights using Arcmap shape files and TINs. (MODFLOW doesn't seem to like TINS but does recognise them). The shape files are divided by 20-50 meter barriers of solid seam (walls of major blocks), would this kind of shape file transfer when placed into MODFLOW easily distinguish between Open channel flow for the known workings, and a general value for the aquitard wall materials. 2) Once the workings are in place at their respective depths, is there a way within GMS to allow all surrounding lithologies to be generalised (i say this as the local geology is cyclotherms and is made more complex by the inclusion of coal mineworkings). I've included the 3D geology image below, exhibiting the space between the coloured seam workings. 3) Would the easiest way to produce connecting shafts between the various seams be by using wells? Thanks in advance, M
  3. Can you use the LAK Package if you do not have the "sub-surface characterization" component of the GMS software, and therefore, cannot create a TIN? How would you establish lake bathymetry without a TIN? Can you use a raster interpolated from 3rd party software? What happens if you leave the bathymetry portion of the LAK package dialogue blank?
  4. Importing TIN's (ARCMAP .adf) into GMS

    Hi all, A bit of a simple question but I can't find the answer anywhere in the help files. I've been provided with some ARCGIS TIN's (.adf files within the TIN folder) and I'm struggling to import them into GMS. Is there a conversion that must be completed before this will work or am I missing something really simple as GMS just spits out errors at present. Thanks in advance M
  5. Hi Everybody, I wonder how possible to use LiDAR data with GMS. For an example, lets say I have some groundwater monitoring bores in my study area. So I use a "bores.txt" file to upload those borehole data in GMS (Similar to "holes.text" file in tutorial - "Boreholes and Cross Sections") . Now I want to snap the tops of those bores to a surface which is the surface of top soil in my study area. According to "Boreholes and Cross Sections" tutorial I should have a TIN file (with .tin extension - page 5) to do that. But I have only LiDAR data as a LAS data set to represent my study area. So could anyone please tell me how to achieve it using my LiDAR data? In fact I have used ArcGIS to generate the TIN surface for the study area with LiDAR LAS data. But I can't export that TIN surface as a file with ".tin" extension using ArcGIS (ArcMap). So I wonder if I can use GMS to generate TIN surface with LiDAR data. OR is there any other way of getting this done? Thanks - Nathan
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