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<p>groundwater flow and solute transport. Problems in describing the saturated zone include the characterization of aquifers in terms of flow direction, groundwater pressure and, by inference, groundwater depth (see: <a href="page.php?w=aquifer_test">aquifer test</a>). Measurements here can be made using a <a href="page.php?w=piezometer">piezometer</a>. Aquifers are also described in terms of hydraulic conductivity, storativity and transmissivity. There are a number of geophysical methods for characterizing aquifers. There are also problems in characterizing</p><p>
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