14) What underground materials are permeable? Which materials are considered to be impermeable?
15) What types of structures can prevent an aquifer from re-filling?
urian, impervision Surces Dams and resivoris
16) Why are wells considered to be a more
reliable source of water when compared to surface water
15) What types of structures can prevent an aquifer from re-filling?
urian, impervision Surces Dams and resivoris
16) Why are wells considered to be a more
reliable source of water when compared to surface water