RockWorks | Utilities | Hydrology | Drawdown (1 Well)
This program is used to calculate water-level drawdown for a single well using the Theis non-equilibrium equation. Data for a single well is entered directly into the program dialog box; it is not read from the program datasheet. The program will display computed drawdown numbers at user-selected distance increments and, if requested, in a simple drawdown diagram.
Menu Options
Step-by-Step Summary
Menu Options
- In the displayed drawdown calculation window, input into each of the prompt boxes the necessary values to be used to calculate the drawdown (shown at the bottom of this window). Each of these values (pumping rate, well radius, transmissivity, storativity, saturated thickness, pumping duration, and distance from well) are required for the Theis equation.
- To indicate that a well is injecting instead of pumping, input the pumping rate as a negative value. Any value may be changed to perform a new drawdown calculation; the new drawdown value will be displayed simultaneously.
- To establish whether the units are Metric or Imperial, select between these radio button options and the unit labels will be reflected in the calculation window.
- Click on the Annotation button to establish the diagram border and title settings.
Step-by-Step Summary
This tool does not require that any data be listed in the main datasheet. It reads data input into the program window itself.
- Access the RockWorks Utilities program tab.
- Select the Hydrology | Drawdown (1 Well) menu command.
- Enter the requested data, listed above.
- To compute the drawdown for the entered data, click on the Compute button.
The program will list in the window to the right the drawdown for the indicated distance increments.
It will also create a diagram to illustrate this (using any border annotation settings you establish), and display it in a RockPlot2D plotting tab.
- View / save / manipulate / print / export the diagram in the RockPlot2D window.
Back to Hydrology Menu Summary
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