So our most valuable tools for quantifying and predicting the flow of ground water are not easy to use. They must be applied with great skill and with great insight. And that, my geological colleagues, is where you come in. Anybody could put three observations wells around a pumping well, install some dataloggers and a computer will answer all the questions you have been struggling to answer in this real, horribly complex world. And which of the Theis Assumptions are not reasonable.
Geologists know better.
And especially before you construct a computer model. It is the geology that controls the ground water, and I have never known an excellent ground water hydrogeologist who was not at the same time an excellent geologist. Tomorrow, a much better Keynote Speaker will tell you about water on Europa. A fascinating, stupendous concept. But keep in mind, you geologists, that it is probably easier to see water halfway across the Solar System than three hundred feet beneath where you now sit.