Wednesday, April 2, 2014

4/2/14

Tonight's homework is to complete Assignment 58, read sections 19.1 and 19.10 (p. 400-401 and 414 - 417), and form a hypothesis about which type of water treatment (from section 19.10 - ex. primary treatment or chlorine treatment, etc.) will be most effective in cleaning the wastewater observed in class today.

Assignment #58 Water Usage Comprehension Questions

Answer all of the following questions to the best of your ability in complete sentences. Or don’t. See if I care.

1. If water is one of our most abundant resources, why are we concerned about its availability in the future? How does our discussion of our water supply connect to sustainability?

2. Think about your own personal water usage. What could (or especially would) you do to reduce your daily consumption of freshwater?

Math Fun! (you’re  welcome)

3a. Your old school showerhead uses 150 L for a 10-minute shower, whereas a reduced-flow showerhead uses only 100 L. If you take one shower per day, how many liters of water would you save in 1 year if you replaced your older showerhead?

3b. Also, your ancient toilet uses 25 L per flush, whereas a replacement toilet uses only 5 L per flush. If you flush the toilet four times per day, how many liters of water would you save in 1 year if you replaced your older toilet?

3c. How much water could both of your innovations and improvements save in a year?

4. Here’s your dam review. The Colorado River runs 1,450 miles from the headwaters of the Rocky Mountains to the Gulf of California. The river has many dams, aqueducts, and canals that divert water in order to supply water for electricity, irrigation, recreation, and domestic use.

a. Describe and discuss two environmental problems that are associated with water diversion.

b. If there is a shortage of water, choices will have to be made as to whether water should be diverted to urban areas, agricultural areas, or natural ecosystems. Make an argument for diverting water for urban consumption and an argument for permitting the flow of water to natural areas.


c. Identify another example (other than the Colorado River) of a large-scale water-diversion project. Discuss two environmental problems that have resulted, or might result, from this project.

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