Chapter 21 Lecture Guide
APES
1)Refresh your memory…what are the main components of the hydrologic cycle?
2)Why is water so unique (there are 4 main properties)?
3)Describe the difference between groundwater, an effluent stream and an influent stream.
4)What is a recharge zone in regards to the diagram on page 436?
5)What is an aquifer? Explain the purpose of an aquifer.
6)What is a water budget and why is it useful to have this as a tool?
7)Why has the groundwater level changed so much in the High Plains region? What sort of impact has this had on the people and other organisms living in that area?
8)What is desalination and what are some positives and negatives of this process?
9)Explain the difference between in-stream and off-stream use.
10)Describe the diagram below in terms of your answer to number ten.
11)What are some trends associated with U.S. groundwater withdrawals from the 1950’s to 1995? What do you suppose could happen eventually?
12)What percentage of our water withdrawals go to agriculture? What are some suggestions for agricultural water conservation?
13)What percentage of national water withdrawals go to domestic water use? What are some measures to reduce domestic water use listed in the text that you did not already know?
14)Read a Closer Look 21.1. Describe 2 specific examples from this passage that show how population growth in urban areas of the U.S. is affecting the water supply.
15)What is sustainable water use, and what are some general criteria for water use sustainability?
16)What are some key points and suggestions in Luna Leopold’s master plan for water management?
17)What important functions do wetlands serve? (p. 449-450, 459, 485-486)
18)A. How are dams useful to us?
B. What environmental impacts do dams have?
C. What economic impacts do dams have?
D. What may happen when dams are removed?
E. Describe two examples of dams and their impacts from the text.
19)Read p. 452 Section 21.2 A Closer Look about the Three Gorges Dam. Summarize where the dam was built, why, what negative impacts it has had or may have on the environment and the residents of the area. What positive effect did it have?
20)What is channelization? List its environmental effects.
21)Read pp 453-458 and summarize the complex issues of water management and the environment as illustrated by the Colorado River.How has the Colorado River been changed by dams? You may use a chart, table or bullet points.
22)Describe the water supply problem we face, and explain what is happening to cause this problem after reading p. 458 section 21.10.