For questions #10-24, we will make use of Figure 9.3, Figur

For questions #10-24, we will make use of Figure 9.3, Figure 9.4,… Image transcription textBefore examining the saltwaterintrusion problems with the Floridianaquifer, we need to explo… Show more… Show moreImage transcription textFigure 9.5: Contour map (A) showingthe elevation changes of a slopingwater table. The slope of t… Show more… Show moreImage transcription textF INGH Spring Stilson, GA PORTROYAL SOUND Blitch Hilton Head, SCPembroke, GAY Wentwor… Show more… Show moreImage transcription textBefore examining the saltwaterintrusion problems with the Floridianaquifer, we need to explo… Show more… Show moreFor questions #10-24, we will make use of Figure 9.3, Figure 9.4, Figure 9.5, and Figure 9.6 in the Lab 9 – Groundwater exercise file, as well as the contour maps in Lab 9 – Floridian Aquifer Map 1900 and Lab 9 – Floridian Aquifer Map 1986. Read the background paragraphs explaining the Floridian Aquifer System and view the figures listed above.      The contour maps (Lab 9 – Floridian Aquifer Map 1900 and Lab 9 – Floridian Aquifer Map 1986) are located along the Georgia and South Carolina coast. These maps show the configuration of the potentiometric surface of the Floridian aquifer prior to major groundwater withdrawals (1900) and after development (1986). These maps also show various landscape features, such as streams, towns, and county boundaries. It is important to remember that the contours represent the hydraulic head within the aquifer, NOT the elevation of the landscape.      Flow lines (in red) have been drawn for each of four (4) points labeled with an ‘X’ on the Lab 9 – Florida Aquifer Map 1900. These flow lines indicate the path that groundwater would have taken in the subsurface. Note that the flow lines cross the contour lines at right angles.      A flow line (in blue) shows the path that groundwater would have taken from the city of Pembroke, GA to the coast (near Hilton Head, SC) in the year 1900.      Find the black dot representing the town of Pembroke, GA in Lab 9 – Floridian Aquifer Map 1900. Suppose that in 1900 the people of Pembroke discovered that the groundwater in the Floridian aquifer had become contaminated from some unknown source. Could the source possibly have been from the city of Stilson, GA, located about 15 miles to the northeast? Explain how you know.       Determine the curved distance, in feet, between Pembroke, GA, and the point on Hilton Head, SC. Use the map scale to detemine the ground distance.       Based on the hydraulic head contours from the 1900 map, and the ground distance you just calculated, determine the hydraulic gradient in unitless form between Pembroke, GA, and Hilton Head, SC.       Calculate the pre-development groundwater velocity (in feet/day) between Pembroke, GA, and Hilton Head, SC, using Darcy’s Law (Equation 9.1). For the conductivity of the Floridian aquifer use 200 feet/day and for porosity use 0.20 (20%).       Using the relationship that velocity equals distance divided by time, determine the number of years it would have taken for groundwater to travel from Pembroke, GA, to Hilton Head, SC. Earth Science Science Geology ERSC 1304

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