Effects of geology on groundwater 1. inject green dye into each of the three injection wells. observe that each well discharges into a different area of the model. 2. observe how quickly the dye moves through the different materials. in what material is the dye moving the fastest? sand or gravel is the dye moving in the confined aquifer? yes or no why or why not? o o is the water level in the confined aquifer piezometers (a, e) higher o lower than the water level in the unconfined aquifer piezometers (b, c,d, f,g)? o what is the cause for the water level difference in the two aquifers? o what are some of the benefits of locating a well in materials where water can move quickly? what are the disadvantages?