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"::i" ;:- ts.~ N C-; c:.:. TABLE OF CONTENTS Chapter Page I INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Background............................................................... .1 MethodologiesExamined ....................................................1 Study Objectives. ...........................................................2 Procedures................................................................ .2 Results. ..... ....... . ... ... . .... . ... . . ... ...... . .. . ... ... .. . ......., .......2 Allocation Model Results (Annual). ..........................................3 Allocation Model Results (Late Season) ......................................4 SWTModels .............................................................4 PROPDEMMModelResults............................................... .4 II LITERATURE REVIEW ... ." ....... ... ....... ...... ... ... ... ... ...........5 HistoricPerspeclive........................................................ .5 Croley, 1974: Sequential Operations of Water Resources Systems Using Adaptive Multiobjective Trade Offs. .................................6 Cohon and Marks, 1975: A Review and Evaluation of Multi- objective Programming Techniques .......................................6 Haimes et al., 1975: Multiobjective Optimization in Water Resources Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 University of South Carolina Symposium on Multiple Criteria Decision Making, Cochrane and Zeleny, Eds., 1973 .. . . .. . .. ... .. . . . . .. .. .. .11 Water Resources Planning, Social Goals, and Indicators: Methodological Development and Empirical Test by the Technical Committee of the Water Resources Research Centers of the Thirteen Western States (Techcom, 1975) .........................................11 Federal Principles and Standards ............. . . . . . . . . . . . . . . . . . . .. .. . .. . .. .. .12 Comparison of Optimization and Simulation Approaches. . . . . . . . . . . . . . . . . . . . . . . . .13 Synopsis ofthe Surrogate Worth Trade-off Method. . . . . . . . . . . . . . . . . . . . . . . . . . .13 Synopsis of the PROPDEMM Simulation Method. ........................... .14 Similarities and Differences of SWT and PROPDEMM . . . . . . . . . . . . . . . . . . . . . . . .15 Integration of SWT and PROPDEMM ..................................... .16 Selected References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 III DESCRIPTION OF REGION. . . . . . . .......................... .19 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 The Virgin River. .. ...................................................... .19 Surface Flow ........ ................................................ .19 Climatic Variability ........................................................ 20 Geology. . . .. . . . . .. . . . . . .. . . . . . . .. . . ..' . .. . . .. . .. .. . .. . . . .. .. .. . .. . .. .... . .20 Soils..................................................................... .20 GroundwaterResources ....................................................20 Water Quality. . ... ... . . .. . . . . . . .. . . . .. . .. . . .. . .. ... . .. . .. . .. .. . .. . . . . . .. . .23 Consumptive Use. . .. .....................................................23 Land Use Pattern. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23 Economic Setting ......................................................... .23 Demographic Data ........................................................ .24 Economic Profile .......................................................... .24 Agriculture.............................................................. .24 ..