Question: According to McPhee, a single debris basin will catch more than a million cubic yards of sediment in a productive season (p. 265). One alluvial

According to McPhee, a single debris basin will catch more than a million cubic yards of sediment in a productive season (p. 265).

One alluvial fan the Santa Anita Fan is comprised of an estimated 2 billion cubic yards.

  • Based on this information, calculate approximately how many years it took for natural processes to build this alluvial fan.
  • Clearly state the assumptions you made to come up with this approximation.
  • Relate this to the average human lifespan and comment on the implications for developing settlements along the mountain front.
  • Describe what information you needed to solve this problem. How did you approach it?

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