Piedmont Hydrology
GE Exercise
1. Determine the horizontal hydraulic gradient between the pumping well and
two other bedrock wells in your area. Make your calculation using data taken
on Friday and on Monday to show how the gradient has changed during the
pumping test. What is the direction of implied flow and the magnitude of the
gradients?
2. Determine the vertical hydraulic gradient between the bedrock and transition
zone, and between the transition zone and the saprolite. Give the wells that
you used for the calculation.
3. Determine the hydraulic conductivity and storage of the bedrock aquifer from
the results of the pumping test using the Jacob method.
4. Determine the hydraulic conductivity and storage of the bedrock aquifer from
the results of the pumping test using the match point method with the Theis
solution.
5. What is the horizontal flux of ground water in the vicinity of the pumping well
before and at the end of the pumping test?
6. Make a contour map showing the distribution of hydraulic head in the
saprolite, transition or bedrock zones. (one person in each group should do
each zone). The map area should extend from the ground water divide to
Walmart. Infer directions of groundwater flow from the map.
7. Make a cross-section showing the topography, contact between saprolite and
transition zone, and contact between transition and bedrock. Use the depths
indicated during drilling.
8. Project hydraulic heads onto the cross-section and contour. Infer directions of
ground water flow from the contours.
9. Plot the baseflow flux measured using the seepage meters as a function of
distance along the stream. Compare the average baseflow flux measured
using seepage meters to the discharge measured using the current meters.