Week 3 Groundwater Lab Report
Answer the lab questions for this week and summarize the lab experience using this form.
Carefully read Ch. 12 of Geoscience Laboratory. Pay special attention to the graphs and figures.
Complete this week’s lab by filling in your responses to the questions from the Geoscience Laboratory. Select answers are provided for you in red font to assist you with your lab work. Although you are only required to respond to the questions in this worksheet, you are strongly encouraged to answer the other questions from the text on your own; doing so will make answering the required questions easier.
Questions are from Geoscience Laboratory, 5th ed. (pp. 213–226), by T. Freeman, 2009, New York, NY: John Wiley & Sons. Reprinted with permission.
12.2 (A) How many cubic kilometers of water reside within groundwater? The answer is 8.4 million cubic kilometers of ground water.
12.2 (B) How many more times abundant is groundwater than water on land? The answer is 0.2 times more than that is abundant on land.
8.4/0.2 = 42
Ground water is 42x more abundant
12.5 So what do you suppose happened when over-pumping of the saturated zone was stopped by that other California state agency?
Levels would begin to rise up to a point where the aquafer shell was not damaged from drying out.
12.6 Can you imagine what happened when the water table rose? Hint: Asphalt and concrete are only so strong.
As water levels rise so would the settle landscape above causing the asphalt and concrete to shift and crack from ground pressure.
12.7 If, for the model in Figure 12.11, h1 were 506 ft, h2 were 497 ft, and l were 150 ft, what would be the hydraulic gradient (in percent) between well #1 and well #2?
Answer: 6 % (506 – 497)/150 = 0.06 * 100 = 6 %
12.11 If contaminants were to find their way into groundwater at Acme Industries, in which well would those contaminants be more likely to appear—the well at the