Question and answer
Which of the following is not an impact associated with the use of hydroelectric energy? a. release of contaminants b. interruption of natural water flow c. increase of riverbed erosion d. disruption
of aquatic wildlife
a. release of contaminants Apart from direct contact, there can also be wildlife impacts both within the dammed reservoirs and downstream from the facility. Reservoir water is usually more stagnant than normal river water. [ As a result, the reservoir will have higher than normal amounts of sediments and nutrients, which can cultivate an excess of algae and other aquatic weeds. These weeds can
crowd out other river animal and plant-life, and they must be controlled through manual harvesting or by introducing fish that eat these plants [4]. In addition, water is lost through evaporation in dammed reservoirs at a much higher rate than in flowing rivers. In addition, if too much water is stored behind the reservoir, segments of the river downstream from the reservoir can dry out. Thus, most hydroelectric operators are required to release a minimum amount of water at certain times of year. If not released appropriately, water levels downstream will drop and animal and plant life can be harmed. In addition, reservoir water is typically low in dissolved oxygen and colder than normal river water. When this water is released, it could have negative impacts on downstream plants and animals. To mitigate these impacts, aerating turbines can be installed to increase dissolved oxygen and multi-level water intakes can help ensure that water released from the reservoir comes from all levels of the reservoir, rather than just the bottom (which is the coldest and has the lowest dissolved oxygen). iated with dams and reservoirs related to the power plants. Reservoirs cover land which was previously in vegetation or forests,. Once underwater the plants decompose anaerobically releasing methane, a powerful greenhouse gas. In addition the flooded land may have contained eco-systems needed for plant or animal habitats. On the plus side - hydroelectric plants may replace coal fired plants reducing the emissions of carbon dioxide and acid gas components. Hydroelectric power plants have a very small effect on the environment, considering the average age of an existing powerhouse in the United States is over a half century, and they release no pollutants into the air. ]
Expert answered|quincyborks|Points 156|
Question
Asked 6/12/2013 11:47:14 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
Which of the following is a social consequence of global fuel dependence? a. rising costs of oil b. increase in atmospheric pollution levels c. poverty causing lack of access to fossil fuel resources d. an increase in the production of fossil fuels
Weegy: Which of the following is a social consequence of global fuel dependence?c. poverty causing lack of access to fossil fuel resources (More)
Question
Expert Answered
Asked 6/11/2013 12:07:58 PM
0 Answers/Comments
Products that can carry the Energy Star logo include _______. a. appliances b. electronics c. lights d. all of the above
Weegy: Products that can carry the Energy Star logo include d. all of the above. (More)
Question
Expert Answered
Asked 6/11/2013 12:34:27 PM
0 Answers/Comments
Why is it important for environmental policy to address pollution concerns? a. Pollution can have a negative impact on human health. b. Pollution is damaging to the environment. c. Pollution can cause a reduction in usable natural resources. d. All of the above
Weegy: the answer is d. All of the above. (More)
Question
Expert Answered
Updated 133 days ago|11/18/2014 3:12:58 PM
1 Answer/Comment
All of the above is correct.
Added 133 days ago|11/18/2014 3:12:58 PM
This answer has been flagged as incorrect.
Rated good by klg0789, Flagged by Kaysha [11/18/2014 3:21:44 PM]
20,201,885 questions answered
Popular Conversations
MyPlate was created to __________.
3/30/2015 1:01:53 PM| 4 Answers
Solve the inequality 9(x - 3) 13/5 x 67/5
Weegy: 9(x - 3) User: Solve the inequality 8(x + 1) > 7(x + 2). x -22 x 6 Weegy: 8(x + 1) > 7(x + 2) 8x + 8 > 7x ...
3/31/2015 6:43:39 AM| 4 Answers
eukaryotes User: prokaryotes
Weegy: The answer is A. The origin of cell membranes, it cannot be any other listed. Anything else? User: Which kinds ...
3/30/2015 5:09:22 PM| 3 Answers
Solve. –5(1 – 5x) + 5(–8x – 2) = –4x – 8x
Weegy: –5(1 – 5x) + 5(–8x – 2) = –4x – 8x; -5 + 25x - 40x - 10 = -12x; -5 - 15x - 10 = -12x; -15 - 15x = -12x; ...
3/31/2015 8:56:36 AM| 3 Answers
Which is a part of the female part of the ...
Weegy: b
3/31/2015 9:03:40 AM| 3 Answers
Evaluate the expression for x = -3. x^2 - 2x + 4
Weegy: The answer is x=5. User: Solve for c. ab - c = 9 Weegy: -2(2x + 5) - 3 = -3(x - 1) -4x - 10 - 3 = -3x + 3; ...
3/31/2015 10:35:54 AM| 3 Answers
Weegy Stuff
S
L
P
L
P
P
P
Points 1274 [Total 9160]| Ratings 0| Comments 1274| Invitations 0|Offline
S
1
L
Points 671 [Total 1582]| Ratings 6| Comments 611| Invitations 0|Offline
S
L
Points 567 [Total 1072]| Ratings 10| Comments 457| Invitations 1|Offline
S
P
C
L
P
L
1
P
Points 565 [Total 7872]| Ratings 8| Comments 485| Invitations 0|Online
S
1
L
L
Points 493 [Total 7994]| Ratings 0| Comments 493| Invitations 0|Offline
S
L
Points 455 [Total 1577]| Ratings 2| Comments 435| Invitations 0|Offline
S
Points 323 [Total 323]| Ratings 4| Comments 283| Invitations 0|Offline
S
Points 199 [Total 567]| Ratings 3| Comments 169| Invitations 0|Offline
S
Points 42 [Total 158]| Ratings 4| Comments 2| Invitations 0|Offline
S
Points 35 [Total 126]| Ratings 0| Comments 35| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2015 Purple Inc.