Correct Response: D. Test well location IV is in the confined aquifer and is the most likely to provide a regular and abundant supply of water year-round. This is because test well location I (A) is near the top of the surface aquifer and so even a small drop in the water table during the summer will stop the flow of water into the well. Test well location II (B) is drilled into the granite, a material with a relatively low ability to transmit water (hydraulic conductivity), so it is likely it will also be a poor source of groundwater. Test well location III (C) is drilled into the clay aquitard, a layer of clay sediment that by definition has very low hydraulic conductivity.
