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Show Waddell and Fields- Model for Evaluating the Effects of Dikes on the Water and Salt Balance of Table 3. Compilation of evaporation data for brines and freshwater [ courtesy of Morton Salt Co.] Great Salt Lake 11 Date Brine Evaporation ( in) Specific gravity Temperature <° F) June 1958 9.95 July 10.51 Aug. 8.96 June 1959 8.76 Aug. 9.52 Aug. 1960 10.76 May 1961 8.23 June 12.41 July 11.77 Aug. 9.05 Aug. 1963 1 0.69 May 1966 7.68 July 11.08 Aug. 10.21 July 1968 11.23 Mav 1969 9.08 July 9.88 Aug. 9.93 June 1970 7.21 July 9.02 Aug. 8.70 July 1971 10.43 Mav 1972 8.60 July 12.16 Aug. 9.55 June 1973 9.46 July 9.24 Aug. 9.46 Average Freshwater evaporation ( in) 1.225 1.230 1.235 1.220 1.210 1.210 1.214 1.220 1.217 1.238 1.206 1.203 1.215 1.200 1.210 1.217 1.218 1.218 1.212 1.216 1.247 1.214 1.215 1.219 1.218 1.218 1 206 1.226 1.218 74 6 75.0 78.7 72 9 74.9 81.5 77.6 76 4 80.6 Ratio of brine to freshwater evaporation 68.3 80.7 78.6 72.7 79.6 79.4 79.2 64.7 81.2 77.8 75.2 81.1 79.6 14.27 15.21 13.09 11.64 12.21 13.10 10.60 14.87 13.85 12.57 13.30 11.08 15.42 13.47 15.17 12.16 12.76 13.83 10.24 12.83 12.98 13.71 10.33 16.51 12.36 11.72 11.92 12 26 76.8 .70 .69 .68 .75 .78 .82 .78 .83 .85 .72 .80 .69 .72 .76 .74 .75 .77 .72 .70 .70 .67 .76 .83 .74 .77 .81 .78 .77 .75 evaporation was 2.98 million acre- ft ( 3,674.3 hm3) or 45 in ( 1,143 mm) per year. Surface Inflow Surface inflow to Great Salt Lake ( Is) was estimated for 1931- 73 by correlation of short- term records obtained at stream- gaging sites near the lake- shore with long- term records obtained at sites upstream. On some streams, several correlations were necessary to extend the record to sites nearest the shore of the lake. The site locations are shown in figure 6, and the period of record is shown in table 6 Some of the 1931- 73 estimates are based on data collected only during 1971- 73. The estimates for these sites are subject to considerable error, and they can be improved only with the collection of additional data. Statistical summaries for all correlations are shown in table 7. The standard error of estimate ranged from 5.1 to 27 percent of the average. Monthly estimates of surface inflow to Great Salt Lake at individual gaging sites are shown in table 16, and total estimated annual surface- and ground- water inflow to the lake is shown in table 17. The inflow boundary to Great Salt Lake was selected as the shoreline for a water- surface altitude of approximately 4,200 ft ( 1,280.2 m). This shoreline is near the dike outlets of bird refuges on the Bear Weber, and Jordan Rivers, which are the main contributors of surface inflow to the lake. Bear River The records of inflow of the Bear River and its tributaries to Great Salt Lake were extended to the dike of the Bear River Migratory Bird Refuge, and the dike was assumed to be the inflow point for the 1931- 73 base period. The gaging station on the Bear River near Collinston ( site 10118000) is the closest site to the inflow point of the Bear River with a record that |