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homework8_ans - SIO 10 Winter 2009 Homework 8 Due Wednesday...

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SIO 10, Winter 2009 Homework # 8 Due Wednesday, March 11 Lecture 22, 23, 24 Chapters 19, 20, 21 20 points Write your answers on a separate sheet of paper with your name and student ID on it. Short, concise answers are preferred above lengthy ones. Note that your handwriting must be legible to receive credit. Be sure to answer all sub-questions and to use your own words. 1) a) What is meant by the term ‘water table’? (1 pt) b) Is groundwater a renewable resource? (1 pt) c) You are very careful about not wasting water. Unfortunately, you have a very lousy neighbor who is always pumping water out of their well to wash the car, do the laundry, water the lawn, etc. One day, you notice that the water you pump out of your well is salty. What happened? What is this phenomenon called? Who do you blame for this injustice? (2 pts) a) The boundary between air-filled pore spaces and water-filled pore spaces (p 665) b) No, not on human timescales (p 676) c) Saltwater intrusion (p 677; fig 19.21): in coastal areas, fresh groundwater floats above salty groundwater. The neighbors over-pumped the freshwater from their well, causing a ‘cone of depression.’ The lowering of hydraulic head raises local the salt/freshwater interface and the
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homework8_ans - SIO 10 Winter 2009 Homework 8 Due Wednesday...

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