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<br />W additional expensive treatment of water prior to reuse or the <br />-.J disposal of such waters. If disposal options are selected, <br />00 addi tic,nal costly alternative sources of water must be developed <br />c:n or imported to meet the demands previously met or that could be met <br />by water reuse. <br /> <br />To date, salinity activities have been directed toward <br />decreasing total dissolved solids and the impacts on the basin's <br />water users. Salini ty is composed of a number of individual <br />constituents, each of which has different impacts on specific <br />beneficial uses. Future research efforts would be needed to <br />address the impacts of individual constituents on specific <br />beneficial uses. <br /> <br />Salinity Monitoring Points <br /> <br />The salinity control plan includes a water quality monitoring <br />and analysis program that provides information on a basinwide basis <br />for plan evaluation. The monitoring and analysis program provides <br />an essential database for future studies, supports state and <br />regional planning activities, and provides, an objective basis in <br />evaluating the effectiveness of salinity control measures. <br /> <br />River monitoring stations maintained by the USGS that are used <br />for monitoring the salinity control program are shown on Figure 6. <br />Data collection at these stations include: streamflow, specific <br />conductance, and periodic sampling for dissolved solids <br />concentration. In addit~o~ to those stations shown in Figure 6, <br />the USGS maintains monitoring stations that are used to analyze the <br />impacts of individual salinity control projects. Further <br />evaluation by the USGS is needed to assess both the spatial and <br />temporal adequacy of the monitoring system. <br /> <br />Some of the Basin states also maintain monitoring networks. <br />As an e~ample, the Utah Bureau of Water Pollution Control maintains <br />27 stations in the Color~oo River basin. Water from these sites <br />is sampled bimonthly and analyzed for chemical constituents, <br />nutrients, 5-day biochemical oxygen demand, suspended solids, <br />dissolved solids, and coliform. In addition, continuous recordings <br />of temperature and specific conductance are taken at seven stations <br />in Utah. <br /> <br />21 <br />