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Different subsets of the data are used to explore simple linear regressions between the San Joaquin River at Vernalis and salinity concentrations downstream on Old River near Tracy to evaluate the conditions in the San Joaquin River Basin under which water quality objectives downstream on Old River are met and whether these conditions are predictable. During dry conditions in the San Joaquin Basin, when flows are low and salinity concentrations are typically higher in the southern interior Delta, no predictive relationship is found between Vernalis and Old River, suggesting that other variables exert more influence on Old River salinity during these times.", "itemRecordStatusId":1, "isModeled":false, "hasProfile":false, "disclaimer":"The Bureau of Reclamation assumes no responsibility or liability for any errors or omissions in the content of this data. 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The HOR temporary barrier is a legacy rock barrier seasonally installed on Old River at its confluence with the San Joaquin River in the southern Sacramento-San Joaquin River Delta, CA. A public record of the spring and fall HOR barrier installation dates is available on the California Department of Water Resources' South Delta Temporary Barriers Project website. https://water.ca.gov/Programs/State-Water-Project/Operations-and-Maintenance/South-Delta-Temporary-Barriers-Project. This HOR barrier index is needed in the computer code to reproduce the analyses described in the \"Exploring Flow and Water Quality Relationships Between the Interior Southern Delta and the San Joaquin River at Vernalis\" final report. 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