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Unformatted text preview: 1 Today QUIZ!!!!!! covers Feb 4 (mapping potentiometric surface) + Feb 7 Mondays lecture Homework #2 due Natural Water Chemistry and Tracers (continued) In class Group Exercise Examples of water research in Florida Monday: Groundwater discharge/Pumping On Sakai: 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. Environmental tracers Solute or isotope used to determine age, flow paths, and/or velocities of flow Example: CFCs Example: CFCs Isotopes are atoms of same element that differ in mass, can be stable or decay (radioactive) Example: hydrogen abundances 1 H 99.98%, 2 H (Deuterium) 0.015%, and 3 H (Tritium) 1e-14 to 1e-16 Stable Isotopes in Water Oxygen has three stable isotopes: 16 O, 17 O and 18 O. Hydrogen has two stable isotopes: 1 H and 2 H (Deuterium, D) Chemically all water behaves the same, but the difference in mass between different isotopes is significant. In water (H 2 O) the weight difference of the isotopes is significant, water will undergo fractionation: Heavy isotopes are more abundant in the liquid phase Lighter isotopes are more abundant in the vapor phase Fractionation is more pronounced at lower temperatures...
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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