This story is a part of Understanding Southern Colorado's Groundwater, an occasional series from KRCC about groundwater resources. As drought and demand affect water resources around Colorado, groundwater from aquifers is also part of the water supply equation. You can have different kinds of rock, but in general, think of rock aquifers as being fracture flow dominated, which means that the water's flowing through fractures in the rock. Those aquifers are generally right next to streams and so water from those aquifers are continually coming into the streams. Lesley Sebol/CGS: Water is recharging into the aquifers and when there’s a drought, there's less water going in.