EESA10H3 Lecture Notes - Lecture 3: Coliform Bacteria, Aquifer, Lake Ontario
13 Apr 2016
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The midterm will be multiple-choice and true/false questions. At least 71% of the earth"s surface is covered with water however, not a lot is readily available. Water sculpts the earth"s surface; and the weather near water bodies is usually moderate. From all the water present on earth, 94. 7% is oceans and saline lakes; only a small portion is fresh water (around 2. 6%). The fresh water is further captured by ice caps, and glaciers (1. 984%) the remaining is the groundwater (0. 592%). Around 0. 014% is readily accessible fresh water lakes takes up most of it (around 0. 007%) while the rest is divided into rivers (0. 0001%), biota (0. 0001%), and atmospheric water vapour (0. 0001%). There are parts of the world where there is water stress (less water). Water stress refers to less than 1700 cubic meters of water per year per person. A worst situation than water stress is water scarcity which is less than 1000 cubic meters of water per year per person.
