ENV - Environmental Science ENV 101 Lecture Notes - Lecture 20: Point Source Pollution, Nonpoint Source Pollution, Brake Fluid
15 Nov 2016
School
Department
Professor
Document Summary
Mississippi river watershed encompasses 40% of land area in u. s. Running though the heartland of american agriculture nitrogen from fertilizers is picked up. The result dead zone in the gulf of mexico due to the lack of oxygen used up by the increase of phytoplankton from excess nitrogen. Eutrophication: excessive amounts of nutrients in a body of water, from the land, which causes dense plant growth, leading to a decrease in oxygen and death of aquatic life. Point source: coming from specific sources such as directly dumping waste into a river. Non-point source: more difficult to pin down originating source because they travel and combine with other sources such as runoff from farms (#1) and urban areas. *non-point source pollution is the nation"s largest water quality problem. Try labeling whether it is point or non-point source pollution: Pipe discharge from a wastewater treatment plant into a river. Chemical pollutants (acids, salts, toxic metals, household hazardous waste)
