APES Unit 7
1. how much of the drinking water in the US comes from groundwater (rural and overall)
2. main reason for water waste
3. consequences of the Aral Sea disaster
4. what percent of freshwater is available for living organisms
5. most water resources are owned by
6. methods to prevent cultural eutrophication
7. large fish kills in developed countries are caused by
8. oxygen sag curves
9. majority of oil pollution comes from
10. reverse osmosis
11. goals of dam and reservoir system
12. options for Egypt to meet water needs if Ethiopia and Sudan decide to divert more water
13. surface runoff
14. ways to strengthen the Clean Water Act
15. Environmental effects of severe drought
16. What percent of lower precipitation than normal constitutes a drought
17. what percent of cities in developing countries discharge sewage into surface water sources?
18. how many fish are unsafe for consumption in the great lakes
19. aquifer
20. why can groundwater not cleanse itself easily
21. clean up methods to control cultural eutrophication
22. Solutions for water waste.
23. what percent of bottled water is contaminated
24. ways farmers can reduce agricultural runoff.
25. hydrological poverty
26. watershed
27. point source water pollution
28. major use of water world wide
29. MTBE
30. What oil company was responsible for the Valdez
31. world’s single largest cause of sickness
32. advantages of composting toilets
33. floodplain
34. method of irrigation that saves water
35. the great lakes has what percent of all the freshwater in the US
36. What percent of the earth’s surface is covered by water?
37. methods for purifying drinking water
38. largest single use of domestic water
39. problems associated with the use of the Colorado River’s water
40. eutrophication
41. problems with desalination
42. aquifers provide drinking water for what percent of the worlds population
43. disadvantages of the Three Gorges Dam project?
44. problems still existing with the great lakes
45. leading cause of water pollution
46. WHO estimates how many people lack access to clean drinking water
47. water pollution
48. point source pollution
49. disadvantages of dams
50. groundwater
Answers
1. 50% U.S., 95% rural
2. cheap prices
3. salt and sand spread 300km, altered local climate, surface level dropped 22m, caused by water diversion
project
4. .024%
5. governments
6. ban phosphate detergents, stop runoff of agricultural fields, conservation and land use measures,
advanced waste treatment
7. deliberate or accidental release of toxic chemicals, malfunctioning sewage treatment plants, pesticides
and plant nutrients from agricultural sources
8. occur when oxygen-demanding wastes are added to the water
9. runoff from land
10. method of desalination that uses high pressure to force saltwater through a membrane filter
11. supply water for cities and agriculture, generate electricity, control floods, provide recreation
12. water sharing agreements, go to war, cut population growth, import grain
13. surface runoff
14. allowing citizens to bring lawsuits to ensure that water pollution laws are enforced, more funding for integrated
airshed and watershed planning, requiring states to do a better job of monitoring and enforcing water pollution
laws, prevention and control of toxic water pollution
15. dries out soil, reduces stream flow, reduces crop yields, decreases tree growth and biomass.
16. 70%
17. 80-90%
18. one out of four
19. The geological layer, consisting of underground caverns and porous layers of sand, gravel, or bedrock, where
groundwater flow.
20. contaminants are not dispersed effectively, cold temp underground slow reactions, lower concentrations of
dissolved oxygen, contaminants are not diluted easily
21. pumping air through reservoirs to avoid oxygen depletion, harvesting excess weeds, treating plant growth with
herbicides, removing algae using algicides
22. night irrigation, avoid growing water-thirsty crops in dry areas, irrigate with treated urban waste water, line canals
brining water to irrigation ditches
23. 40%
24. planting buffer zones between cultivated lands and water, using no fertilizer on steeply sloped land, using slowrelease fertilizers, keeping cropland covered with vegetation
25. The lack of sufficient water to meet the needs of the people in a country or region
26. The land from which surface water drains into a particular lake, river, or other body of water
27. Off shore oil rig
28. irrigation
29. phased out of use, gasoline additive, leaked into aquifer, suspected carcinogen
30. Exxon
31. unsafe water
32. cheaper to install and maintain, saves large amounts of water, converts human fecal material to soil-like fertilizer
supplement, decreases energy used to pump and purify water
33. area adjacent to a stream
34. trickle or drip irrigation system
35. 95%
36. 71%
37. carbon nanotubes, nanofilters, protecting watersheds, intense sunlight
38. toilet flushing
39. The river does not have much of a flow considering its size, Mexico and the U.S. have agreed to take more water
than the river has, water seldom makes it to the mouth of the river, The Colorado River basin includes some of the
driest areas in the U.S.
40. The natural nutrient enrichment of a shallow lake, estuary, or slow moving stream
41. Result of desalination is concentrated brine that must be disposed of, high cost, reduces important ions that are
essential to plant growth, requires a large input of energy to accomplish.
42. 50%
43. May release large amounts of methane gas, Has flooded many cultural and archeological sites, May become a
sewer as cities dump untreated sewage into it, An earthquake could cause a flood killing millions.
44. Native carnivorous fish are declining in most of the lakes, New pollutants in the lakes including pharmaceutical,
There is continuing wetland loss and degradation of habitats, Populations of native species at the base of the food
chain are declining.
45. agricultural activities
46. 1 out of 6
47. Any chemical, physical, or biological agent added to water that harms living organisms
48. Pollution that is from a single location that is easily identifiable
49. disrupts migrations of fish, displaces people behind the dam, leads to devastating flooding if there is a failure,
reduces nutrients released downstream
50. Water in the spaces between soil, rock, and gravel,