# 3 point problem - Groundwater Gradient Exercise Geology 210...

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Groundwater Gradient Exercise Geology 210 Objectives: In this lab we will perform the following tasks: 1) Measure water levels in six wells located on the edge of the CSUS campus. 2) Plot the results from shallow and deep wells on two different maps. 3) Construct three point problems to determine the direction of groundwater flow in shallow and deep wells. 4) Write a technical report that summarizes results. Equipment needed: Ruler or engineering scale, calculator Today’s exercise: 1) Measure water levels in the three shallow wells and three deep wells. These water levels must then be converted to elevations above or below sea level (note: the common abbreviation for sea level is MSL or “Mean Sea Level”). Use the following formula to calculate the elevation of the water table above or below sea level: (Land surface elevation) - (Measured water level) = Elevation (MSL) Record your results on this table: Well number Land surface elevation (surveyed elevation at top of casing) Measured water level in well (from land surface to water table) Elevation of water table (MSL) MW-1 MW-1A MW-2 MW-2A MW-3A MW-3A

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2) Plot the water levels (MSL) for the shallow wells on the map labeled “Shallow wells". Plot the water levels (MSL) for the deep wells on the map labeled “Deep wells". 3) Construct a graphical three-point problem to determine the direction of groundwater flow for each of the maps.
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• Spring '14
• Aquifer, sea level, deep wells

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