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Exercise 12: Lugeon Test

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

This exercise is written with the assumption that you are familiar with Lugeon Test methodology and data requirements, and are familiar with the AquiferTest interface.

[1] Launch AquiferTest and choose the "Create a new project" button. If you already have AquiferTest open, create a new project by clicking the (New) button from the toolbar, or select File/New from the main menu.

[2] Create a new "Lugeon Test" by selecting Test > Create a Lugeon Test from the main menu.

[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

Dimensions: m

Volume: m3

Pressure: psi

Conductivity: m/s

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

 

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

 

Step #

Gauge Pressure (PSI)

1

41.5

2

62.5

3

78.0

4

62.0

5

40.0

 

[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.
 

Step #

Gauge Pressure
(psi)

Flow Readings (m3)

1

2

3

4

5

6

7

8

9

10

1

41.5

8.836

8.852

8.867

8.883

8.899

8.915

8.931

8.947

8.962

8.979

2

62.5

9.023

9.043

9.062

9.083

9.103

9.123

9.144

9.164

9.184

9.204

3

78

9.252

9.276

9.3

9.325

9.348

9.372

9.396

9.421

9.445

9.469

4

62

9.5

9.52

9.539

9.559

9.579

9.599

9.618

9.638

9.658

9.678

5

40

9.715

9.73

9.745

9.76

9.775

9.79

9.805

9.82

9.835

9.849

 

Importing from Excel: Browse to your installation folder, and locate the
"C:\Users\Public\Documents\AquiferTest Pro\Exercises\Supporting Files\" directory and open
LugeonTest.xls.  This should load into MS Excel. Select the first flow reading in cell B3 and drag a box to the last flow reading, in cell K7, to select all flow readings for all the steps. The selection should appear 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.

 

[9] You are now ready to do 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.  

[10] 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

 

[11] 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:

 

 
 

[12] Click on the (Print) button in the tool bar, or select File/Print from the main menu. You may want to print to PDF, in which case, this option can be setup in the Tools/Options.

[13] Save your project by clicking on the (Save) icon or selecting File/Save from the main menu.

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 by Visual MODFLOW Flex. You have the choice of exiting AquiferTest or continuing on to the next exercise.

 

 


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