GPHY 103 Chapter Notes - Chapter 5: Nonpoint Source Pollution, Point Source Pollution, Polychlorinated Biphenyl
18 Dec 2016
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Week 4 textbook notes: chapter 5 water quality. Water pollution particular purpose. dependent on temp. Temp shocks kill aquatic life. bubbles in water; critical to support aquatic life. Affected by temp, salinity, atmospheric pressure and oxygen demand from plants and animals. discrete, identifiable location. Relatively easy to quantify; impacts can be directly evaluated. Sources e. g. factories and wastewater treatment plants, landfills, abandoned mines, above and underground storage tanks (usts) very difficult to identify and quantify. Enter water through precipitation, groundwater and surface water movement. Sources e. g. lawns, gardens and golf courses, agricultural practises, street refuse, construction activities, storm water runoff and dredging activities: pollution naturally or by human activity. Water = polluted if it"s unusable for a: point source pollution contamination discharged through a pipe or other. Bogs have ph 4-7 while eutrophic lakes have ph 7-11: turbidity relative measure of clarity; reflects how much suspended matter, hardness amount of dissolved calcium, magnesium and iron present in water.
