Why does soil erosion increase flooding?

Once the soil has been removed by erosion, only the passage of centuries or millennia will enable new soil to?

• form. In areas where considerable soil still remains, though, a rigorously enforced program of land protection and cover-crop planting may make it possible to reverse the present deterioration of the surface. It can be inferred from the passage that the author most likely believes which of the following about the future of desertification? 1. Government will act quickly to control further desertification. 2.The factors influencing desertification occur in cycles and will change in the future. 3. Desertification will continue to increase. 4. Desertification will soon occur in all areas of th worlds. So I mistook of this question, the correct answer is 3. But I still don't understand. Thank you for helping.

• Answer:

  It, the statement, basically sounds like someone who is a proponent of the desertification that is occurring now, in present time. The 'author' of the statement is basically saying that, without the initiation of rigorous soil creation programs, the land as we know it to be now will soon be dried up, devoid of nutrients and minerals. A soil that most plants would not be able to survive in. Basically, a desert soil. To rule out 4, the author is saying that there are still places around the world (say, heavily vegetated places, ex: forests) that still have abundant soil. These areas are not in immediate (next few hundred years) of becoming areas without rich soils