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 283 days ago|11/18/2014 3:12:58 PM
1 Answer/Comment
All of the above is correct.
Added 283 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]
21,938,095 questions answered
Popular Conversations
What is a culture region? A. a geographic unit determined by ...
Weegy: C. a large, contained region, like a continent User: A thematic map that shows languages or religions ...
8/27/2015 12:51:36 PM| 3 Answers
Complete the analogy below. Fingers are to hands as _______ to ...
Weegy: Fingers are to hands as TOES to feet. User: Hammer is to nail as screwdriver is to ...
8/27/2015 8:58:25 AM| 2 Answers
What was the main agreement made with the establishment of the North ...
Weegy: C. that each nation would come to one another's defense in the event of a Soviet attack User: Who ...
8/27/2015 1:02:18 PM| 2 Answers
blank endorsement?
8/27/2015 3:47:01 PM| 2 Answers
Write the equation for 5x 2y = 3 in slope-intercept form.
Weegy: The equation for 5x + 2y = 3 in slope-intercept form is y = -5/2x + 3/2. User: 5x+2y=3 solve for x User: y= ...
8/27/2015 9:25:42 PM| 2 Answers
Weegy Stuff
S
P
C
L
P
L
1
P
P
1
P
1
P
L
P
R
Points 1188 [Total 11541]| Ratings 7| Comments 1118| Invitations 0|Offline
S
L
Points 764 [Total 1079]| Ratings 1| Comments 754| Invitations 0|Offline
S
L
L
P
1
Points 703 [Total 9276]| Ratings 2| Comments 683| Invitations 0|Offline
S
1
L
L
Points 693 [Total 9161]| Ratings 2| Comments 663| Invitations 1|Online
S
Points 486 [Total 712]| Ratings 1| Comments 476| Invitations 0|Offline
S
Points 242 [Total 250]| Ratings 0| Comments 242| Invitations 0|Offline
S
Points 224 [Total 224]| Ratings 3| Comments 194| Invitations 0|Offline
S
Points 214 [Total 533]| Ratings 1| Comments 204| Invitations 0|Offline
S
Points 165 [Total 242]| Ratings 0| Comments 165| Invitations 0|Offline
S
Points 139 [Total 170]| Ratings 0| Comments 139| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2015 Purple Inc.