Formative Assessment 2: Water Use Quantity

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Instructions

For each problem below, calculate the correct numerical answer. In order to receive full credit, you must show all your work. Remember to mind your units.

Questions

  1. Suppose that typical person uses 210 gallons of water per day. How many residents could the 50 cfs flow of Spring Creek in Houserville PA support?
  2. Penn State withdraws 2.5 million gal/day for the main campus. How much would that weigh? How much is that per person? How many acre-feet is it per day?
  3. Las Vegas’s allocation from the Colorado River is 300,000 acre-feet/yr. How many gallons is this? How does that compare to the 2.5 million gallons/day total yield of Penn State’s pumping wells?
  4. Lake Mead holds 31 million acre-feet. How many gallons is that? How long would it take Spring Creek at Houserville to fill up the reservoir?

Worksheet

Download the worksheet to use for submitting your assessment.

Submitting Your Answers

Bring your hand-written answers to class. Make sure your calculations are written neatly enough that another person can understand them.

Scoring and Rubric

Each problem will earn a maximum of 5 points, as described in the rubric below.

Rubric
Work Shown Possible Points
Calculation is set up correctly 2
Units converted correctly 1
Work is legible 1
Correct answer 1