Exercise 12: Lugeon Test

This tutorial provides an example of a Lugeon Test analysis and associated data requirements. For more general information on this solution, please refer to the Section on Lugeon Tests.

This exercise is written with the assumption that you have gone through the Quick Start Demo Tutorials, and are familiar with the AquiferTest interface.

NOTE: The Lugeon test solution is available in the AquiferTest Pro edition.

[1] If you have not already done so, double-click the AquiferTest icon to start an AquiferTest session.

[2] At the Welcome page ensure that the "Create Lugeon Test" box is checked and choose the "Create a new project" button.   A blank project with the Lugeon Test tab active loads automatically. The loaded page should look similar to the one shown below:

[3] Complete the fields for the Lugeon Test as follows:

For the Project Information Frame

•Project Name: Lugeon Example

•Project No.: 1

•Client: ABC

•Location: Your Town

For the Lugeon Test Frame

•Name: Lugeon Test Analysis

•Performed by: Your Name

•Date: filled in automatically

For the Flow Meter Type Frame, choose the "Volume" radio button.

For the Units frame:

•Site Plan: m

•Volume: m3

•Conductivity: m/s

•Dimensions: m

•Pressure: psi

•Conductivity 2nd column: m/d

For the Geometry frame:

•Pressure Reading: Borehole Transducer

•Top: 0

•Bottom: 8.5

•Depth to GW: 4.25

Finally, fill in the details for the Test bore in the table at the bottom:

•Name: BH-01

•X: 0

•Y: 0

•Elevation: 0

•Benchmark: 0

•B: 0.096

This completes the section for the project/test information. Once you are finished, the Lugeon Test tab should look like the image below:
 

[4] Click on the Lugeon Test Data & Analysis tab from the top of the main window.  

[5] Define the following settings (at the top).

•# of pressure steps: 5

•# of flow readings: 10

•Analysis Performed by: Your Name

•Analysis Date: filled in automatically

[6] Enter the following data in the "Gauge Pressure" column, for the corresponding step.

[7] Next you will enter the flow readings into the main table; this can be done manually "by-hand" which is recommended if you are copying directly from field notes. Alternatively, if you have the data already in an Excel worksheet, you can copy from Excel and paste into the grid in AquiferTest (quicker and easier). Follow one of the options below:
 

•Manual data entry: Enter the following data shown in the table below, for the "Flow Meter Readings".  This can be done manually (following the data shown in the table below).
 
Start with the first empty row in the grid. This corresponds to the flow readings for Step 1. Enter the value for Flow Reading 1, Step 1, then work your way to the right, and enter the remaining Flow Readings for Step #1.  Once finished, proceed to the second row in the grid, and enter the flow readings for Step 2.
 

 OR

•Importing from Excel: Browse to your installation folder, and locate the folder: "C:\Users\Public\Documents\AquiferTest Pro\Exercises\SupportingFiles\" and open LugeonTest.xls in MS-Excel or a similar spreadsheet application. Select all of the data by clicking in the upper left cell with data (cell B3), holding the <SHIFT> key selecting the lower right cell with data (cell K7) so that all data cells are selected, as shown below:

•Select Copy (or Ctrl+C on keyboard) to copy the selection to the clipboard.

•Minimize your Excel window, and re-activate AquiferTest.

•Select the cell corresponding to Flow Meter Reading 1, in Step 1, adjacent to the Gauge Pressure Reading

•Select the Paste button from the toolbar (or Ctrl+V on the keyboard) to paste the data into the grid.

[8] When you are finished entering the data, the Lugeon Test Data & Analysis tab should look like the image below:

Notice that once the data has been entered, AquiferTest will automatically calculate the Conductivity and Lugeon values for each step, average values for all steps, and populated the diagrams at the bottom of the display.

You are now ready to perform the interpretation. This involves assessing the Lugeon Diagram and the Flow vs. Pressure Diagram, and comparing the observed patterns to a set of "Diagnostic" images.  You will see this data set is indicative of "Turbulent" conditions.

[9] Click on the "Turbulent" icon below the Lugeon Diagram, and this condition will be added to the "Test Result Interpretation" at the bottom of the window.  You will also see the calculated average values for the average Lugeon value and Hydraulic Conductivity:

•Lugeon: 5.5

•Hydraulic Conductivity: 6.40E-7 m/s

•Hydraulic Conductivity: 0.055 m/d

[10] Click on the Reports tab, and select the Lugeon Test Analysis report as shown below (be sure you have the "Lugeon Test - BH-01" item checked on and selected in the tree). The report should look like the image below:

NOTE: You can add your company information and logo to the space in the upper left of the report page(s) by selecting Tools > Options from the main menu and adjusting the settings in the Reports tab.

[11] Click on the (Print) button in the tool bar, or select File > Print from the main menu.

[12] Save your project by selecting File > Save As, and define a project name (e.g. Example 12.HYT).

This concludes the Lugeon Test exercise. The next example provides an review of a Multi-Layer Aquifer analysis based on a dataset from a numerical model generated using Visual MODFLOW Flex. You have the choice of exiting AquiferTest or continuing on to the next exercise.

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