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
The National Wildlife Refuge provides land for fish, wildlife, and plants. true or false?
Question
Updated 149 days ago|1/31/2016 10:36:42 AM
1 Answer/Comment
The National Wildlife Refuge provides land for fish, wildlife, and plants. TRUE.
Added 149 days ago|1/31/2016 10:36:42 AM
This answer has been confirmed as correct, not copied, and helpful.
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
25,643,158 questions answered
Popular Conversations
-9=-2-k
Weegy: k=56 User: -9=-2-k over 8 Weegy: k=56 User: -9+3 over 4 n=-13
6/28/2016 12:46:48 PM| 3 Answers
How far does a bus travel in 4 hours at 55 mph? User: Solve for x. ...
Weegy: 33%. Misha increased her test score by 33.33...% which is approximately 33%. User: x/2 = -5 User: Solve for ...
6/28/2016 3:53:27 AM| 2 Answers
Which of the following has been a serious cost of industrialization ...
Weegy: A negative impact on the environment has been a serious cost of industrialization in East Asia. ...
6/28/2016 7:01:03 AM| 2 Answers
The United States remained neutral during the early years of WWII, ...
Weegy: World War II (WWII or WW2), also known as the Second World War, was a global war. It is generally considered to ...
6/28/2016 7:14:59 AM| 2 Answers
It's 3:34, what time was it 50 mins ago?
6/29/2016 2:36:26 AM| 2 Answers
Weegy Stuff
S
P
L
Points 1006 [Total 1667] Ratings 2 Comments 986 Invitations 0 Offline
S
Points 354 [Total 715] Ratings 2 Comments 334 Invitations 0 Offline
S
L
P
P
P
Points 156 [Total 3699] Ratings 0 Comments 156 Invitations 0 Offline
S
Points 156 [Total 231] Ratings 1 Comments 146 Invitations 0 Online
S
Points 137 [Total 418] Ratings 0 Comments 137 Invitations 0 Offline
S
Points 127 [Total 179] Ratings 0 Comments 127 Invitations 0 Offline
S
P
1
Points 107 [Total 852] Ratings 3 Comments 57 Invitations 2 Offline
S
L
Points 86 [Total 4206] Ratings 0 Comments 86 Invitations 0 Offline
S
Points 40 [Total 50] Ratings 1 Comments 30 Invitations 0 Offline
S
Points 32 [Total 139] Ratings 0 Comments 32 Invitations 0 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.