Lab Report – Water Resources

Answer the following quiz questions to report your results of the Water Resources lab.

1.What is the source of water for your hometown?

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2.Construct and state a hypothesis with regards to your expected water usage compared with the water usage of your classmates. (Same as what you wrote out on your data collection sheet)

3.Construct a pie chart of your personal water usage. Be sure your pie chart contains all of the required components of a good graph. Also be sure that units of measure are clearly stated in your pie chart. Once done, upload a picture file of that pie chart to this question.

To take a screenshot on Mac, press the cmd+shift+4 keys at hte same time. This allows you to select an area on your screen to capture. Click, drag to select desired area, then release to do so.

To take a screenshot on Windows, press the shift+PrtScr buttons at the same time to capture the active window/program. Open Microsoft Paint and paste the image there. It can be cropped if you so choose.

4.Construct a pie chart of the classes average water usage. Be sure your pie chart contains all of the required components of a good graph. Also be sure that units of measure are clearly stated in your pie chart. Once done, upload a picture file of that pie chart to this question.

To take a screenshot on Mac, press the cmd+shift+4 keys at hte same time. This allows you to select an area on your screen to capture. Click, drag to select desired area, then release to do so.

To take a screenshot on Windows, press the shift+PrtScr buttons at the same time to capture the active window/program. Open Microsoft Paint and paste the image there. It can be cropped if you so choose.

5.Compare your direct water usage and the ways in which you use water to your average classmate. Are there some activities where you use a lot more (or less) water than the class average? If so, discuss why this might be so (e.g., you might take very long showers, whereas the average student takes a short shower.) Refer to your pie charts you uploaded to help explain your conclusions.

6. Compare the distribution of your water usage with that of the average US household. Refer to the figure below, as well as your own pie chart. Describe your observations.

According to the American Water Works Association, average per capita indoor water usage in the U.S. is 69.3 gallons/day. This value excludes water usage for landscaping, washing your car, etc. With conservation measures, it is estimated that this per capita water usage would decrease to 45.2 gallons/day.

7. Construct a histogram of the classes total direct water usage. Be sure your histogram contains all of the required components of a good graph. Also be sure that units of measure are clearly stated in your chart. Once done, upload a picture file of the histogram to this question.

To take a screenshot on Mac, press the cmd+shift+4 keys at hte same time. This allows you to select an area on your screen to capture. Click, drag to select desired area, then release to do so.

To take a screenshot on Windows, press the shift+PrtScr buttons at the same time to capture the active window/program. Open Microsoft Paint and paste the image there. It can be cropped if you so choose.

8. Discuss how the classes’ water use is distributed (i.e. does the distribution appear normal, skewed, bimodal, or…?). What does this mean in terms of the class’ water use?

9. Upload your completed excel sheet.

10.Now, we will compare your water usage with the average San Francisco resident.

Discuss how your average daily water use compares to that of the average San Franciscan that uses 40.60 gallons per day (source: SFPUC, August 2017).

Do you use more or less water than the average San Franciscan. What might explain the difference if there is one?

11.What percentage of the students in our class use less water than the average San Franciscan who uses 40.60 gallons/day?

12.Calculate your total daily water use by multiplying your direct water use by 17. This value incorporates both the water you use directly and the water used to manufacture other products that you consume. For example, it takes 280 gallons of water to produce a Sunday newspaper; over 1000 gallons for a ¼ pound hamburger, fries and soda; it takes 4 liters of water to produce the plastic water bottle and fill a 1 liter bottle of water that you purchase; and it takes about 100 gallons of water to produce one glass of milk.

Enter your total water use to answer this question. Be sure to include units in your answer.

13.Estimate the average total daily water use for the average student in your class. To generate this estimate, multiply the students’ average direct daily water usage by 17.

Enter the value for this estimate to answer this question. Be sure to include units along with the value for your answer.

14.Estimate the total daily water use in San Francisco. Assume every person in San Francisco uses the average daily direct water use of 40.60 gallons/person per day. Now multiply this value by 17 to calculate total per capita water use to include both direct and indirect daily water use. To calculate the total water use by the city, multiply the total per capita daily water use by the population of the city. Assume there are 890,000 people in San Francisco.

Enter the value for this estimate to answer this question. Be sure to include units along with the value for your answer.

15.Estimate the water saved from a 10% reduction in water use by all San Franciscans. If every person in San Francisco reduced their water use by 10%, how much water would be saved each day? To generate this estimate, multiply average total daily water use by 10%.

Enter the value for this estimate to answer this question. Be sure to include units along with the value for your answer.

16.To put into perspective the daily water savings you just estimated, consider the Upper Merced River at the Pohono Bridge in Yosemite National Park, California. The river has an average flow rate of 19,500,000 gallons per day. How many Merced Rivers would equate to the water savings if everyone in San Francisco made a 10% reduction in their total water use?

Enter the value for this estimate to answer this question. Be sure to include units along with the value for your answer.

17.Now that you have calculated how many Merced Rivers worth of water would be saved if each person in San Francisco simply reduced their water usage by 10%, reflect on that analysis and briefly state your thoughts based on that reflection exercise.

18.Now, let’s consider your original hypothesis and if the analysis that you performed has allowed you to confirm or deny that hypothesis. Briefly state the answer and your reasoning.

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