Confined and unconfined aquifers; combining geology with flow nets/water level maps

By the end of today's class, you should be able to do the following:

v Draw a quantitatively accurate flow net for flow beneath a dam, and use it to make calculations of discharge below the dam. Answer the following questions about the dam flow net:

o If the sediments have a hydraulic conductivity of 0.28 m/day, and the dam is 200 m long going back into the page, calculate the flow rate of water under the dam. (Give your answer in units of cubic meters/day.)

o At Point A, what is the total hydraulic head? Elevation head? Pressure head?

v Evaluate other flow nets drawn by your colleagues, pointing out specific good points and flaws.

v Describe the difference between unconfined and confined aquifers, and given subsurface data, identify them.

v Describe how geologic conditions relate to hydrogeologic conditions. For example, what geologic conditions consitute a no-flow boundary? constant head boundary? aquifer? aquitard?

v Use published maps to investigate geologic conditions in this area:

Well #10: Twp 38N, Range 8E, Section 33, Plot 4h. (This well is 82 ft deep.)

Well #11: Twp 38N, Range 8E, Section 33, Plot 5h. (This well is 59 ft deep.)