The Theis equation is used to evaluate the hydraulic properties of an aquifer. It is typically used when studying the flow of groundwater from a well, and it can be used to estimate the transmissivity and storage coefficient of the aquifer. The equation is based on the assumption that the aquifer is homogeneous and isotropic, and that the water is flowing radially from the well.
To obtain the aquifer parameters using the Theis equation, you need to plot the data obtained from pumping tests on a semi-logarithmic graph. The data should be plotted as a function of time and draw a straight line that represents the data. The slope of the line can be used to determine the transmissivity of the aquifer, while the intercept can be used to determine the storage coefficient.
The Jacob Straight-line Method is used to determine the hydraulic conductivity of an aquifer. It is typically used when studying the flow of groundwater through a confined aquifer. The method involves plotting the data obtained from pumping tests on a semi-logarithmic graph, as in the Theis equation. However, instead of drawing a straight line through the data, the Jacob Straight-line Method involves drawing a curved line that represents the data. The slope of the line can be used to determine the hydraulic conductivity of the aquifer..