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Show CONTENTS Page Abstract 7 Introduction 7 Hydrology of the lake prior to construction of the causeway 9 Hydrology of the lake after construction of the causeway 9 Initial sequence of events, 1959- 63 9 Trends since 1963 15 Dissolved solids 15 Chemical composition 17 Measurements of discharge through causeway and estimates of load movement during 1969 water year 19 Discharge through the culverts 19 Discharge through the fill 24 Net discharge and load movement through the causeway 24 Possible future effects of the causeway on the chemistry of Great Salt Lake 25 Industrial withdrawal of brine 28 Needs for additional study 28 Selected references 31 Appendix A 33 Results of tracer studies 33 General conclusions from the tracer study 34 Appendix B 37 Computations of discharge and movement of dissolved salts through the causeway, 1969 water year 37 Appendix C 41 Tables of chemical analyses 41 3 |