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<br />Co\) <br />Co\) <br />l\) <br />'1 <br /> <br />Table <br /> <br />2.3, <br /> <br />2,4, <br /> <br />3.1. <br /> <br />3,2. <br /> <br />3.3. <br /> <br />3,4, <br /> <br />LIST OF TABLES <br /> <br /> <br />Page <br /> <br />2.1. <br />2.2. <br /> <br />Precipitation of CaC03 and gypsum in soil. . <br /> <br />Estimated threshold salt concentrations (TSC) for <br />Pachappa sandy loam . . . . . . . . . . . <br /> <br />4 <br /> <br />5 <br /> <br />Results of studies of drainage water salt <br />concentrations. . . . . . . . . . . . . . <br /> <br />10 <br /> <br />Trends in changes of soil salt loading with river <br />water type and leaching fraction. . . . . . <br /> <br />15 <br /> <br />Criteria for evaluating salinity management <br />models. . . . . . . . . . . . . . . . . '.' <br /> <br />17 <br /> <br />Characteristic analysis of water and salt <br />budget models . . . . . . . . . . . . <br /> <br />18 <br /> <br />Characteristic analysis of soil-water system <br />models. . . . . . . . . . . . . . . . . . . . <br /> <br />22 <br /> <br />Characteristic analysis of detailed hydrosalinity <br />models. . . . . . . . . . . . . . . . . . . . . <br /> <br />23 <br /> <br />3.5. Characteristic analysis of ground~ater-salinity <br />models. . . . . . .. ............ <br /> <br />26 <br /> <br />3.6. Comparison of results with more sophisticated <br />modeling of chemical reactions (after Willardson <br />et 81. 1979), . . , , . . . , . . , . , , . . <br /> <br />30 <br /> <br />3.7. Capabilities by model categories to evaluate <br />salinity management alternatives (for short <br />term and long range predictions). . . . . . . <br /> <br />4.1. <br /> <br />4,2. <br /> <br />4,3. <br /> <br />4,4. <br /> <br />4.5, <br /> <br />4,6, <br /> <br />5.1. <br /> <br />31 <br /> <br />Irrigation system efficiencies adopted by different <br />researchers in the Grand Valley area, Colorado. <br /> <br />Hydtologic and climatologic datB stations used <br />in this study . . . , . . , . .' ,.,., <br /> <br />39 <br /> <br />39 <br /> <br />Selected parameter values adopted for BSAM-SALT <br />calibration. . . . . . . . . .' ..... <br /> <br />41 <br /> <br />Summary of sensitivity studies for Grand Valley, <br />Co lor ad o. . . . . . . . . . . . . . . . . . . . . <br /> <br />41 <br /> <br />Variations in <br />with data for <br />Colorado. . . <br /> <br />parameters from model calibration <br />system 1 and system 2, Grand Valley, <br /> <br />51 <br /> <br />Relative sensitivity analysis of system 1 and <br />system 2 to deep percolation and TDS concen- <br />tration in the outflow, Grand Valley, Colorado. <br /> <br />Parameter values and 1970-1972 cumulative response <br />summary for Management Alternative 1: line canals <br />and maintain farm delivery at base line level . . . <br /> <br />51 <br /> <br />58 <br /> <br />xi <br />