The first key step of geologic modeling in IGW-NET is to map lithologic records from borehole depth intervals to a particular category or class (or type of aquifer material); for example, AQ (aquifer material), CM (confinig material), MAQ (marginal aquifer material), and PCM (partially confining material).
For a given borehole dataset, all unique descriptions should be mapped to a material class before proceeding (to the extent possible - depth intervals with descriptions that are not mapped will be "skipped" in the analysis).
Default IGW-NET Mapping File
A number of large water well borehole datasets are available on the MAGNET Data Center. All of the unique lithologic descriptions from each of the large datasets have been re-processed using a conventional material name system ("shorthand" or abbreviated descriptions, eg. Clay, Clay_A_Sand, Clay_Gravel_Sand, ...).The default mapping file shown in the table of this menu subsection is an example to map data to four material classes (AQ, CM, MAQ, PCM). If you intend to use borehole data from the MAGNET Data Center, the default mapping that is provided is the best option. Users can overwrite this default mapping file (e.g. with an approach mapping data to five or six material classes and giving different class names), but they must use the same format.
User-provided Mapping File
If you are modeling in an area where borehole lithology data is not currently available on the MAGNET4WATER Data Center (i.e., you are using your own borehole lithology data), you must provide the mapping file that is associated with your borehole lithology shapefiles (see the Help Page for Borehole Well Data for more details on lithology shapefiles).The mappping file is a simple .txt file that uses the following format:
1st line - must include the following text: Material number
2nd line - the number of lithologic descriptions (materials) that are being mapped
3rd line - must include the following text: Category number
4th line - the number of categories (material classes) that the lithologic descriptions (materials) are being mapped to.
5th line - should include a '1', followed by a comma (','), followed by the class name for the first mapping category (e.g., 'AQ').
6th line - should include a '2', followed by a comma (','), followed by the class name for the second mapping category (e.g., 'MAQ').
...Use as many lines as necessary to indicate the class name for the 3rd, 4th, etc. mapping categories. In the default dataset, lines 7 and 8 are used for these purposes (in other words, because there are four total categories in the default dataset, lines 5, 6, 7, and 8 must be used).
...The remaining lines are used for mapping each lithologic description to a category. The description (as it appears in the borehole shapefile) is followed by a comma (','), which is followed by the class/category name that it will be assigned to.
You will note that, in the default mapping file, AQ is mapped to AQ ('AQ,AQ'), PCM is mapped to PCM, etc. This is in the case that the user has already categorized the materials into the desired classes.
Material Colors
You will notice 4 colored buttons along the bottom of this menu subsection. These are the colors that will be used for the different categories upon visualizing the categorized boreholes and TP model results.You can click on any of the buttons to change the category color. A small submenu will appear that allows you to select a new color. You can define the color with text inputs for RGB, HSL, and HEX formats, or you can use the color palette and slider to "manually" select a color.