water conservation & water quality 11.4. water quality how do we know if the water is good? –...
TRANSCRIPT
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Water Conservation &
Water Quality 11.4
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Water Quality
• How do we know if the water is “good?”– Dissolved oxygen– Pathogens– Temperature– pH– Turbidity– Suspended sediment– nitrates– http://ga.water.usgs.gov/edu/characteristics.html
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Where does pollution come from?
• There are two main categories of water pollution:– Point source– Nonpoint-source
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Point source pollution
• Comes from one specific source:– Leaking sewer pipe– Leaking tanker– Outfall pipe from a factory
• This type of pollution can be identified, monitored and controlled.
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Point source pollution
http://www.bing.com/images/search?q=bp+oil+spill+pictures&qs=IM&sk=IM1&pq=bp+oil+spill+&sp=2&sc=8-13&form=QBIR#x0y37
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Nonpoint-source pollution
• Comes from many vague sources:– lawns– fields– roadways
• This type of pollution is difficult to trace, difficult to monitor and difficult to control.
• Education is the best remedy!
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• http://www.txlawncare.com/wp-content/gallery/landscape/riding-spreader-ferlizing-lawn.jpg
http://www.bing.com/images/search?q=nonpoint+source+pollution+examples&view=detail&id=A087CA45F3EE0D8EB31D011B4651652D96A1DDD0&first=0&FORM=IDFRIR
http://www.bing.com/images/search?q=litter+images&view=detail&id=06A70A7E2B26B95CA01BF41C312F4040898BADD2&first=0&FORM=IDFRIR
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Cultural eutrophication
From Miller’s Living in the Environment
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Wastewater treatment
From Miller’s Living in the Environment
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Primary treatment
• Large screen to catch solids such as plastics, bottle caps, paper.
• Large tank where small particles can sink & get filtered out.
• Oil floats to surface & is skimmed off.
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Secondary treatment
• Water flows to aeration tank where oxygen & bacteria are mixed.
• Bacteria feeds on the waste.• Water flows to another tank.• Water is disinfected with chlorine, UV or
ozone.• Water is released to stream or river.
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NC Water Use
• http://www.ncagwater.org/documents/NC_Agricultural_Water_Strategic_Plan_Exec_Summary.pdf
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NC Law for water conservation
• http://www.ncwater.org/Reports_and_Publications/hb1215/HB1215_Sec5_Report.pdf
http://www.bing.com/images/search?q=Water+Conservation+Ideas&view=detail&id=924A5F6C23BE13E3FA7C4DAEC1525681838B5121&first=0
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What can you do to reduce your water consumption?
• With your team, generate a list of ways that you can reduce your water consumption. Every drop counts!
• Here are some ideas…let’s compare our lists:
• http://wateruseitwisely.com/100-ways-to-conserve/index.php
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Homework
• Read pages 326 - 331
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Output
• Select 3 ways to reduce your water use. • Write them in your notebook.• Share these ideas with your family tonight.• Make a mental note about how they respond
to your ‘water conservation’ lesson.