effects of accelerated soil erosion

Question 1

list the effects of accelerated soil erosion

Answer 1

1) reduced productivity
2) sedimentation of rivers and reservoirs
3) increased atmospheric particulates
4) desertification

Question 2

outline how accelerated soil erosion reduced productivity

Answer 2

• when soil is eroded the fertile top soil is lost
• the remaining soil may be less fertile so plant growth may be reduced leading to smaller harvests
• erosion may leave shallower soil so root penetration may be more difficult

Question 3

outline how accelerated soil erosion affects sedimentation in rivers and reservoirs

Answer 3

• soil particles are carried into rivers where they are deposited when the water slows and has less kinetic energy
• this slow occurs down in reservoirs or on coastlines
• soil sediments in a river reduces speed of flow capacity so increases likelihood of overflow causing flooding during heavy rain

Question 4

outline how accelerated erosion causes increased atmospheric particulates

Answer 4

• wind erosion increases particulates in the atmosphere which can increase health problems such as asthma

Question 5

outline how accelerated soil erosion can cause desertification

Answer 5

• soil erosion causes the expansion of deserts

- it makes it more difficult for vegetation to grow which contributes to further soil erosion and reduced rainfall