Function
In the vicinity where the three ice lobes began to retreat, sits the recharge areas that allow surface water to enter back into the ground source. The speed of absorption depends on the density of aquifers and aquitards. Aquifers are made up of sand, gravel and silt where the water filters down relatively quickly. The shallow aquifers feed area bodies of water such as creeks and streams while the deeper aquifers feed down to replenish the ground water. The aquitards are the protective layers of clay that slowly filters the water and act to protect the main source from contamination. Left on its own, it is a naturally renewable way to gather fresh drinking water.
Read more about this topic: Waterloo Moraine
Famous quotes containing the word function:
“Of all the inhabitants of the inferno, none but Lucifer knows that hell is hell, and the secret function of purgatory is to make of heaven an effective reality.”
—Arnold Bennett (1867–1931)
“The mother’s and father’s attitudes toward the child correspond to the child’s own needs.... Mother has the function of making him secure in life, father has the function of teaching him, guiding him to cope with those problems with which the particular society the child has been born into confronts him.”
—Erich Fromm (1900–1980)
“Our father has an even more important function than modeling manhood for us. He is also the authority to let us relax the requirements of the masculine model: if our father accepts us, then that declares us masculine enough to join the company of men. We, in effect, have our diploma in masculinity and can go on to develop other skills.”
—Frank Pittman (20th century)