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<br />Potential for On-Farm Improvements <br />Lower Gunnison Salinity Study <br /> <br />TABLE OF CONTENTS <br /> <br />Item <br /> <br />I. Summary <br /> <br />II. Introduction <br />Authority for Investigation <br />Purpose and Objectives <br />Scope of Study <br />Study Coordination <br />Irrigation Management Scheduling <br />Description of Plan Formulation <br />Levels of System Improvements <br />Levels of Improvement <br />Economic Analysis <br />Onfarm Benefits <br />Downstream Benefits <br />Other Benefits <br />Principles and Standards <br /> <br />III. Setting <br />Location <br />Physiography and Geology <br />History and Archaeology <br />Climate <br />Water Supply <br />Land Resources <br />Wildlife Resources <br />Social and Economic Characteristics <br />Present Land and Water Uses <br /> <br />IV. Problems and Needs <br />Historical <br />Salinity Problems in the Lower Gunnison Unit <br />Salt Loading <br />Erosion and Sediment <br />Water Supply Management <br />Water Budget Analysis <br /> <br />V. Plan Formulation and the Alternative Plans <br />Off-farm Lateral Improvements <br />Plan Formulation <br />Plan One - Continuation of Ongoing Programs <br />Plan Two - Improved Irrigation Water Management - <br />Minimum Level - 59,899 acres <br />Plan Three - Onfarm Ditch Lining - Minimum Level - 35,800 <br />Plan Four - Irrigation Water Management and Onfarm Ditch <br />Lining - Minimum Level - 43,800 acres <br />Plan Five - Irrigation Water Management and Onfarm Ditch <br />Lining - Maximum Level - 41,400 acres <br /> <br /> Page <br /> I-I <br /> II-I <br /> II-I <br /> II-2 <br /> II-3 <br /> II-4 <br /> II-5 <br /> II-5 <br /> II-I0 <br /> II -10 <br /> II-13 <br /> II-13 <br /> II-14 <br /> II-14 <br /> II-15 <br /> III -1 <br /> III-l <br /> III-2 <br /> III -2 <br /> III-4 <br /> 1II-5 <br /> 1II-5 <br /> 1II-5 <br /> lII-lO <br /> III -11 <br /> IV-l <br /> IV-l <br /> IV-4 <br /> IV-6 <br /> IV-7 <br /> IV-8 <br /> IV-8 <br /> V-I <br /> V-2 <br /> V-3 <br /> V-6 <br /> V-7 <br />acres V-I0 <br /> V-13 <br /> V-16 <br /> <br />001193 <br />