Author Question: A city with a population of 80,000 people covers an area of 10 miles by 12 miles. The city council ... (Read 195 times)

kfurse · **on:** Jul 15, 2018

A city with a population of 80,000 people covers an area of 10 miles by 12 miles. The city council
wants to determine if it has enough groundwater resources to supply its population at the U.S. average
rate of 1,400 gallons per person per day. Drilling has determined that there is a 20-foot thick aquifer
under the entire city with a porosity of 20 and a specific yield of 5. The city geologist has
determined that the sustained yield is one-fiftieth of the specific yield. Up to how many gallons per
person per day can this city pump water without lowering the water table? (There are 640 acres in a
square mile and 325,851 gallons in an acre-foot.)
a. 1,251 gallons per person per day
b. 62,563 gallons per person per day
c. 100,101,427 gallons per person per day
d. 625,633,920 gallons per person per day
e. 5,005,071,360 gallons per person per day

Question 2

What is the name for surface runoff due to the intersection of the ground surface with the water table?
a. brook.
b. creek.
c. river.
d. spring.
e. stream.