Geography 2011A/B Lecture Notes - Lecture 3: Sewage Treatment, Cyanobacteria, List Of Dragonlance Characters
20 Dec 2017
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The great lakes: non-persistent water pollution: non-persistent easy to fix, persistent harder, chemicals of emerging concern really difficult, but cause, effect, remedy unknown. If you stop adding pollutants, it will breakdown naturally: degradable = damage is reversible, can be broken down by chemical reactions or by natural bacteria into simple, non-polluting substances, examples, domestic sewage, fertilizer, some industrial wastes. Chicago sanitarium had to reverse direction of chicago river because they were dumping sewage into the lake they were also getting their drinking water from: system repaired itself when sewage was redirected. Biological productivity = the amount of living material supported within a lake: least productive = oligotrophic, most productive = eutrophic. Process of going from least to more productive not necessarily always a good thing: = eutrophication - results in oxygen depletion, the larger the body of water, the less productive it will be. Productivity determined by: temperature, light, depth, volume, nutrients.
