Which of the following statements describes subsidence at the central (San Joaquin) valley of California?
A) Gradual subsidence occurred over several decades due to the deep subsurface withdrawal of oil and gas.
B) Gradual subsidence occurred over several decades due to the withdrawal of groundwater mainly for irrigation purposes.
C) Rapid subsidence occurred due to a collapsible soil.
D) Rapid subsidence occurred due to a collapse sinkhole.

Question

Quizplus · Accepted Answer

Gradual subsidence has occurred in the central (San Joaquin) valley of California over several decades due to the withdrawal of groundwater mainly for irrigation purposes. This has caused the land surface to sink by as much as 28 feet in some areas, leading to infrastructure damage and increased risk of flooding.

Which of the Following Statements Describes Subsidence at the Central