This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Building artificial levees has been said to be self-perpetuating. Why does building a levee in one ... (Read 145 times)

hubes95

  • Hero Member
  • *****
  • Posts: 561
on: Jul 15, 2018

Building artificial levees has been said to be self-perpetuating. Why does building a levee in one place
  along a river system prompt the construction of another downstream? What will be an ideal response?



Question 2

What are two benefits and two negative aspects of large dams on rivers? What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

polinasid

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 15, 2018
Answer to Question 1

Where new levees are built, usually on top of natural ones, floodwater is prevented from entering the
adjacent floodplain. This water is then forced to flow downstream to other areas. Natural levees in
those areas will then experience higher than normal water levels and may be overtopped. The typical
solution to this flooding problem is construction of an artificial levee. During the next high water
period, the story is repeated, thus perpetuating levee construction in the downstream direction.



Answer to Question 2

The benefits could include cheap electricity, clean electricity, flood control, irrigation, recreation, and
drought prevention. The negative aspects could include loss of habitats, endangerment of species, loss
of natural flooding, sediment deposition, increased erosion below the dam, negative effects to delta
areas downstream, and in some cases, loss of life from failure of dams.



hubes95

  • Hero Member
  • *****
  • Posts: 561
Reply #2 on: Jul 15, 2018
TY


polinasid

  • Sr. Member
  • ****
  • Posts: 344
Reply #3 on: Jul 15, 2018
Happy to Help


« previous next »
 

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

Building competency in patient centered care Building competency in patient centered care
Head binding, or artificial deformation, was used by some populations as a sign of identity. Head binding, or artificial deformation, was used by some populations as a sign of identity.
Artificial photosynthesis Artificial photosynthesis
Sites of action of some respiratory inhibitors and artificial electron acceptors Sites of action of some respiratory inhibitors and artificial electron acceptors
Romans Crossing The Danube and Building A Fort Romans Crossing The Danube and Building A Fort
Building a synthetic version of the 1.08-Mb Mycoplasma mycoides genome JCVI-syn1.0 Building a synthetic version of the 1.08-Mb Mycoplasma mycoides genome JCVI-syn1.0
Video: Secondary and tertiary levels of protein structure Animation

For a complete list of videos, visit our video library