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20 <br /> 1 Slide #6 <br /> Well Overview <br /> Water-table Artesian <br /> • Well (n): A pit or hole well well <br /> sunk into the earth to Land surface <br /> o •Potentivmetric::.- <br /> reach water ufTOCe — <br /> — ` <br /> Z? N UNCONFINED SANG Qfr nIgeY� <br /> AQUIFER <br /> • Water-table vs Confined waler.l. . + :Nell <br /> screen � . <br /> rweLLs - - - - - - - - - - - - - - -- <br /> z CONFINING - - - - - - - - - - - - - <br /> o - - - - - - _- CLAY <br /> ^ BED _ _ _ _ - - - - <br /> • Sustainability and CONFINED Open <br /> susceptibility to LIMESTONE= heit <br /> c AQUIFER <br /> contaminants varies <br /> Heath,1983.Basic Ground-Water Hydrology <br /> 2 AAM <br /> 3 C.J. Cornette defined wells simply as a hole in the ground that water is pulled out of, <br /> 4 distinguishing between shallow water table wells in unconfined aquifers and deeper confined <br /> 5 aquifer wells. He emphasized that community wells target confined aquifers because they are <br /> 6 more protected from any contamination that happens at the surface. Shallow wells are <br /> 7 susceptible to contamination from various sources, including, for example, nitrate from fertilizer <br /> 8 from a property across the street. <br /> 9 <br /> 10 Slide #7 <br /> Well Overview cont. <br /> • Well uses: <br /> • Extraction <br /> • Information <br /> • Resources like water,oil,minerals <br /> • Contaminants <br /> • Injection <br /> • Water <br /> • Heat <br /> • Treatments for contaminants <br /> • Monitoring <br /> • Drinking Water <br /> 11 AIM <br /> 12 C.J. Cornette said wells aren't just for water. He said boreholes can be drilled to examine <br /> 13 sediments and identify the type of rock under the surface, which can be used to advise a variety <br />