According to this graph, which shows water balance for the Ogallala aquifer, which of the following statements are true?
A) More water is taken out of the aquifer than is gained from recharge.
B) Less water is taken out of the aquifer than is gained from recharge.
C) Springs and rivers take out more water than does pumping.
D) As the aquifer dewaters, it expands, increasing the amount of pore space in which to store water.

Question

According to this graph, which shows water balance for the Ogallala aquifer, which of the following statements are true? 
A) More water is taken out of the aquifer than is gained from recharge. 
B) Less water is taken out of the aquifer than is gained from recharge. 
C) Springs and rivers take out more water than does pumping. 
D) As the aquifer dewaters, it expands, increasing the amount of pore space in which to store water.

Quizplus · Accepted Answer

The graph shows that the withdrawal rate (blue line) is consistently higher than the recharge rate (yellow line) for the Ogallala aquifer, indicating that more water is taken out of the aquifer than is gained from recharge. Therefore, statement A is true. Statement B is false. There is no information in the graph to support statement C. Statement D is also false as dewatering of the aquifer implies a decrease in pore space.

According to This Graph, Which Shows Water Balance for the Ogallala