301-a8 - Name: _ Raw score: _/50 Percentage: _/100% GY 301:...

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GY 301: Geomorphology Lab 8: Groundwater and Karst Geomorphology Page 1 of 5 Your Task: Today’s lab deals with the interpretation of geomorphological features that typically occur due to the action of groundwater. The exercises should be able to be completed within the 2 hour lab period provided that you do focused work on them. The most common scale (1:24,000) will not easily fit on the small desks that we have in room 42 and today, some of the questions require you to compare maps. Once again, it might be a good idea to push a couple of desks together. Please put the desks back in rows when you are done. Outside of the normal lab session, maps are available in the storage cabinets in room 337. They are alphabetically sorted. Due Date: 5:00 PM, October 30th PART ONE: GROUNDWATER Problem 1: Ashby, Nebraska 15' Sheet. Note: This quadrangle map area covers part of the Sand Hills region of western Nebraska. The surface units are composed of very porous sand and there is little vegetation in the area a) Why are there so few streams on the map? _________________________________________ _____________________________________________________________________________________ ____________________________________________________________________________ [2 points] b) Water Table contours: Match the upper right corner of your 8.5 x 11" sheet of tracing paper with the northeast corner of the quadrangle. Your tracing paper should cover the approximate northeast quarter of the map area. Trace the lakes (blue) onto the tracing paper, including the lake elevations which are printed inside the lake boundary on the quadrangle. Assuming that the lake elevations represent the elevation of the water table, contour the water table with blue pencil using a contour interval of 5 feet. On your tracing paper label the value of each contour. From the contour map show the direction of groundwater flow with a red arrow. [10 points]
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This note was uploaded on 02/05/2012 for the course GLY 301 taught by Professor Staff during the Fall '10 term at S. Alabama.

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301-a8 - Name: _ Raw score: _/50 Percentage: _/100% GY 301:...

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