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Unformatted text preview: 1 Today: Natural Water Chemistry Wednesday: GW Chemistry and Tracers • Homework 2 due • Quiz will cover Feb 4 (mapping potentiometric surface) + today’s lecture On the class web page: Homework 3 will be available. Due Feb 16 th On Sakai: A quiz that covers the Hydro Cycle (Jan 19 th lecture) and is available until Feb 16 th . Note: only your top 10 quiz grades are counted toward your grade. This is one of two “extra” quizzes during the semester that will be online and can replace a quiz grade. Online quizzes are open (you can consult books, notes, friends). Unlike in-class quizzes, points off are not cut in half. Water Sampling: – Springs and wells are sources of groundwater – drill and develop well – purge well to get representative sample • monitor pH, specific conductivity, temperature, and turbidity until it stabilizes – collect samples, filter and preserve (if necessary) Water Sampling: • Samples: – ‘Field parameters’ (T, pH, SpC, alkalinity) • Temperature • pH – acidity of water • Specific Conductivity (SpC) – current carried by water is proportional to the amount of dissolved ions in solution • Alkalinity – acid neutralization capacity of water – Dissolved ions • Major ions in water are calcium, magnesium, sodium, potassium, chloride, bicarbonate, sulfate – Metals • Common metals include iron, manganese, copper, strontium – Inorganic & organic carbon + carbon isotopes – Nutrients – nitrogen, phosphorus Water Sampling: • Quality assurance (QA), quality control (QC) • “blank” samples: check there is no contamination from sampling devices or handling • “spike” samples: sample of known value is sent to the...
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This note was uploaded on 10/19/2011 for the course GLY 3882 taught by Professor Screaton during the Spring '09 term at University of Florida.
- Spring '09