Author Question: Which has a higher porosity: sand or sandstone? Why? What will be an ideal ... (Read 10 times)

nenivikky · **on:** Jul 15, 2018

Which has a higher porosity: sand or sandstone? Why?

What will be an ideal response?

Question 2

Major coastal cities such as Charleston, South Carolina, have to find a delicate balance between supplying enough water for a healthy, growing city and preventing contamination of their groundwater supplies with saltwater due to overpumping.

What steps could be taken to counteract the effects of saltwater contamination without abandoning the well? Explain.
What will be an ideal response?

scrocafella · **Reply #1 on:** Jul 15, 2018

Answer to Question 1

Answer: Sand, because sandstone has been compacted and has cement lining part (or all) of the pore spaces.

Answer to Question 2

Answer: Reduce the amount of water taken from that well. Drill a new well further inland in a different aquifer. Inject wastewater into the subsurface to keep the saltwater below the level of the freshwater.