3 Types of Porous Media n = VV / VT = Vol Voids / Total Vol Freeze and Cherry, 1979.
4 Porosity - not good indicator of flow Bedient et al., 1999.,
5 Pressure and Elevation Heads - Field = pressure headz = elevation headh = total headFreeze and Cherry, 1979.
6 Two 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.
7 Horizontal and Vertical Head Gradients Freeze and Cherry, 1979.
10 The Major Aquifers of Texas OgallalaCarrizo-WilcoxEdwardsGulf Coast
11 Recharge 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