3Types of Porous Media n = VV / VT = Vol Voids / Total Vol Freeze and Cherry, 1979.
4Porosity - not good indicator of flow Bedient et al., 1999.,
5Pressure and Elevation Heads - Field = pressure headz = elevation headh = total headFreeze and Cherry, 1979.
6Two Confined Aquifers with Different Heads Groundwater will tend to flow from the top aquifer to the bottom aquifer.We can’t make any conclusion about horizontal head gradients from this picture.Charbeneau, 2000.
7Horizontal and Vertical Head Gradients Freeze and Cherry, 1979.
10The Major Aquifers of Texas OgallalaCarrizo-WilcoxEdwardsGulf Coast
11Recharge Artificial Natural Precipitation Recharge wells melting snow Infiltration by streams and lakesArtificialRecharge wellsWater spread over land in pits, furrows, ditchesSmall dams in stream channels to detain and deflect water