Reading | Question 1 of 10

According to paragraph 2, protective levees can have which of the following disadvantages?

  • They can greatly increase the destruction caused by floodwaters when floodwaters are higher than the levee.
  • They can fail even when the flood level remains below the height of the levee.
  • They can lead over time to a serious salinization problem.
  • They can cause damaging floods to occur more frequently by changing basic water patterns.
Water management in early agriculture