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<br />CONTENTS
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<br />ABSTRACT , , . , , . , , . . , , . , . . . . , , . . , , , , , . , . , . . , . . , . , , . . . . , . . , , . , . , , . . , . , .. I
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<br />INTRODUCl10N . , . . . , , . , . . , , . , , . , , , , . , , . . , , . , . . , , . , . . , . , , . , , . , . , . . , , , . . " I
<br />Background ...,."..,....".".,...."."..,.,.""".,.,...,.,.,.,. 4
<br />Purpose and scope. . . , . . , . . . . . . . , , . , . . , . , . , . , . . , . , , . . , . , , . , . , . . , . , , " . , 7
<br />Acknowledgments. . . . . . . . . . , . . , . . , . . , . . . , . , , . , , . , . , , . . . . , , . , . , , . . . . , , , 7
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<br />PHYSIOGRAPHY AND GEOLOGY. . . , . . , , . ' , . . , . . . , , , , , . , , . , . . , . , , . , . . . . . , . . , . '8
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<br />HYDROGEOLOGY. . . . . . . , . . . , . , . . . , . , , . . , . , . , . , . . , . , . . , . , . , , . . . . , . . , . , . . . , 8
<br />Properties of alluvial deposits . , . , , . . , , . , . . , . . , . , , . . , , , , . , . , , . . . . . , . . . . , . , , 8
<br />Mineralogy and particle size . . . , . , ' . . . . . . . , . . , , , . . . . . . , . , . . . , . . , . . . " IO
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<br />Thickness. . . . . . . . . . . . . . . . , . , ' . . . , . , , . , , . . . . , . . . , . . . , . . , . . , . . . .. IO
<br />Hydraulic conductivity . . . . . . , . , , . . . . , . . . . . , . . , , . . . . , , . , . . . . . . . . . . ., IO
<br />Specific yield ...............,.,...,..,.,..,......,..,........... 14
<br />Porosity ...............,..........."..",.."...,..,.....,..,. 16
<br />Recharge 10 detention basin .,......,.',..,.,..,...,..,...",.,..,...",. 17
<br />Discharge from detention basin . . . . . . . . . . . . . . , . . . . . . . . , , . . . . . , . , . , . . . , . , .. 19
<br />Chemical quality of ground water in study area.....,..,....".,.....,...,..", 22
<br />Dissolved-solids concentrations. , . . . . . . . . . . . . , . . , , . , . . , . , , . . . . . . . . , . " 22
<br />Dissolved-solids load 10 Las Vegas Wasb , . . . . . . . . , . . , . . . . . . . . . . . . . . . , . ., 23
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<br />SIMULATING EFFECrS OF PROPOSED SLURRY WALL ON GROUND-WAffiR fLOW
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<br />AND SOLUTE TRANSPORT . . . . , . . . . , , .. , . . . . .. . , , . . , . . , . , , . . , . . . . . , , . . . , , ., 25
<br />Mathematical modeling teehnique used."..."...,..,..,.....,.,........... 25
<br />Planimelric model of ground-water flow. , , . , . . . . . . . . , . . . . , , . . , , , , . . . . . . . . . ., 29
<br />Constructing themathematicalmodel.,..,.,..,."..,..""..,..,..,.,.. 29
<br />Results of model simulations ..,.,..........,...,.,..,.....,.......,. 31
<br />Cross-sectional model of flow and solute transpon .,.............,........,.,., 34
<br />Constructing the mathematical model,.........,.,...,.................. 34
<br />Results of model simulations .,..,.'.,.......",......,..'...,...,.,.. 36
<br />Effects of varying aquifer and solute properties . . . . . , , , , . . . . , , . . . . . , . , . . , ,. 36
<br />Effects of aquifer thickness. , . . , . . , . . . . . . , . , , . . , . . . , . . , . .. , , , . . , , , . .. 39
<br />Effects of using field-estimated hydrologic properties .,.....,.....,........, 39
<br />Model incorporating evapotranspirntion and Las Vegas Wash inlO the cross section . . . . , . , 4 I
<br />Modifying the existing mathematical model ..".,.".".""..,..,....". 41
<br />Results of model simulations ..,',....,..,....,....,...,.,.......,... 46
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<br />SUMMARY AND CONCLUSIONS ..,.,..,.,.....,.,..,..,.,....".,..,.".,., 49
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<br />REfERENCES CITED , . . . , . , , . , . , . , . . , . . . . , . . . . , , . , . . . . . . , , . . . . , , , . , . . . . . ., 51
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<br />APPENDIX A . . . , . . . , . . . . . . , , . . , , . , , , . . , . . , , , . . , . , . . , . , . . . , . , . , , . , . . . . , . , 53
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<br />APPENDIX B . . , . , . . . . . . . . . . . . . , , , , , , , , . . , . , . . , . , . . , . , . . . . . , . , . . , . , , . , . . . 55
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