Question

select all the correct answers. a region experiences frequent landslides from heavy rains. how can the local residents lower the frequency of landslides in the region?

• start contour plowing soil in valleys that are impacted by landslides.
• plant vegetation on the slopes that experience landslides.
• encourage deforestation in the regions that haven’t suffered landslides.
• divert water so it flows into the affected region.
• rebuild the slopes where landslides occur.

Explanation:

To lower landslide frequency:

• "Plant vegetation on the slopes that experience landslides": Vegetation stabilizes soil, reducing erosion and landslides.
• "Redirect the slopes where landslides occur": Modifying slope geometry (e.g., terracing) can reduce slope steepness and water runoff, lowering landslide risk.
• "Divert water so it flows into the affected region" is incorrect (increases water, worsening landslides).
• "Encourage deforestation in the regions that haven’t suffered landslides" is incorrect (deforestation removes root systems that stabilize soil, increasing landslide risk).
• "Start contour plowing soil in valleys that are impacted by landslides": Contour plowing (plowing along slope contours) reduces soil erosion and water runoff, stabilizing slopes.

Answer:

• Plant vegetation on the slopes that experience landslides
• Redirect the slopes where landslides occur
• Start contour plowing soil in valleys that are impacted by landslides