Geosciences
Introduction The structural controls on groundwater accumulation and flow exhibit a wide range of variability. Faults can act as highly permeable pathways, or as barriers for groundwater flow depending on … Read More
Introduction Societal demands for flood control, water resources, and domestic/industrial energy helped initiate a prolific period of dam design and construction throughout the United States during the early- and mid-twentieth … Read More
Climate models This graphic shows various ways that water can reach and recharge a groundwater aquifer: precipitation that percolates directly down into the aquifer; recharge from streams or runoff; water … Read More
The nature of subsurface materials strongly influences the rate of groundwater movement and the amount of groundwater that can be stored. Two factors are especially important: porosity and permeability. Porosity … Read More
Some of the water that soaks in does not travel far because it is held by molecular attraction as a surface film on soil particles. This near-surface zone is called … Read More
