EVS 205 Lecture Notes - Cuyahoga River, Improved Sanitation, Trophic State Index
12 Mar 2014
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Document Summary
Global water pollution in rivers, lakes, groundwater, and oceans: pollution: freshwater lakes, lakes and reservoirs are more susceptible to runoff contamination than rivers, eutrophic. Nutrient overload produces blooms: algae and or/cyanobacteria. Algae die decomposing bacteria multiply: causes do2 levels to drop, ex: greenfield lake. Toxin is absorbed and stored in specific organs or tissues at higher than. Toxin levels are increased as they pass through food chains and webs. (fat-soluble, organic compounds) Ddt, pcbs, radioactive isotopes: water pollution can contribute to, bioaccumulation expected levels, bio-magnification, groundwater pollution, gas container leaks, sewage leaks, water pollution in other countries, lake maracaibo, venezuela. Largest lake in south america (bigger than connecticut) 9,600 miles of pipes in lake (leak oil) Runoff: until 1990s, raw sewage from 1. 4 million people, agricultural runoff. Bp oil spill: government reports, report released was not peer reviewed, states: 4. 9 million barrels of oil escaped from bp"s blown-out well. About 36% of spilled oil had naturally dispersed, evaporated or dissolved.
