BISC 3 Lecture Notes - Lecture 12: Water Cycle, Water Table, Aeration
Document Summary
Water resources: water is essential for life, water dissolves nutrients and distributes them to cells, regulates body temperature, supports structures, and removes waste products. About 60% of your body is water: you could survive for weeks without food but only a few days without water, water also is needed for agriculture, industry, transportation, and a host of other human uses. In short, clean freshwater is one of our most vital natural resources. In asia, the tibetan glaciers that supply water to major rivers and drinking water for 3 billion people are shrinking rapidly. Groundwater zones: zone of aeration, shallow layer of soil containing both air and water, zone of saturation, lower soil layer with pores lled with water, water table, top of zone of saturation that supplies most wells. Rivers, lakes, and wetlands recall that lakes make up 45%of 0. 8% of 2% of the world"s water.
