References!
http://pubs.usgs.gov/ha/ha730/ch_j/J-text5.html (all images borrowed from this reference.)
http://water.usgs.gov/ogw/aquiferbasics/miss.html
http://www.hillsdalecounty.info/planningeduc0054.asp
https://docs.google.com/a/stpatselkhorn.org/viewer?a=v&pid=gmail&attid=0.1&thid=135c216c7f62c49c&mt=application/pdf&url=https://mail.google.com/mail/ui%3D2%26ik%3D6815125354%26view%3Datt%26th%3D135c216c7f62c49c%26attid%3D0.1%26disp%3Dsafe%26zw&sig=AHIEtbR8XwiBLjgSYCDIWDWaLU_4W8IpFw
http://www.seminolecountyfl.gov/envsrvs/watercon/important.aspx
Check out the websites above for more information!