#### Table 2. - Salton Sea, California, Area and Capacity Tables

Salton Sea tables were generated by the area-capacity program ACAP85, using the least squares method of curve fitting developed by the Bureau of Reclamation Technical Service Center. This program computes area at 1.0-, 0.1-, and 0.01-foot increments by linear interpolation between basic data contours. Respective capacities and capacity equations are then obtained by integration of area equations. The initial capacity equation is tested over successive intervals to check whether it fits within an allowable error term. At the next interval beyond, a new capacity equation (integrated from the basic area equation over that interval) begins testing the fit until it too exceeds the error term. The capacity curve thus becomes a series of curves, each fitting a certain region of data. Final area equations are obtained by differentiation of the capacity equations. Capacity equations are of the form y = a + a2x + a3x2, where y is capacity and x is the elevation above an elevation base. The capacity equation coefficients for the Salton Sea are shown below (epsilon = 0.000001). All elevations are below sea level.

#### 1995 AREA-CAPACITY TABLES

 Equation Number Elevation Base Capacity Base Coefficient A1 (Intercept) Coefficient A2 (1st Term) Coefficient A3 (2nd Term) 1 -278.60 0 .0000 .0000 360.4167 2 -278.00 129 129.7500 432.5000 2605.5000 3 -277.00 3167 3167.7500 5643.5000 3714.6500 4 -276.00 12525 12525.9000 13072.8000 4630.0000 5 -275.00 30228 30228.7000 22332.8000 6031.3000 6 -274.00 58592 58592.8000 34395.4000 5612.2500 7 -273.00 98600 98600.4500 45619.9000 5729.3000 8 -272.00 149949 149949.6500 57078.5000 6016.4000 9 -271.00 213044 213044.5500 69111.3000 5764.8000 10 -270.00 287920 287920.6500 80640.9000 5284.2500 11 -269.00 373845 373845.8000 91209.4000 3562.4500 12 -268.00 468617 468617.6500 98334.3000 2994.7000 13 -267.00 569946 569946.6500 104323.7000 2628.7500 14 -266.00 676899 676899.1000 109581.2000 2467.4000 15 -265.00 788947 788947.700 114516.0000 2360.3000 16 -264.00 905823 905824.0000 119236.6000 2276.8500 17 -263.00 1027337 1027337.4500 123790.3000 2010.9500 18 -262.00 1153138 1153138.7000 127812.2000 1887.1000 19 -261.00 1282837 1282838.0000 131586.4000 1813.2000 20 -260.00 1416237 1416237.6000 135212.8000 1690.7000 21 -259.00 1553141 1553141.0725 138593.4064 1625.5516 22 -256.00 1983550 1983550.2000 148341.6000 1581.4000 23 -255.00 2133473 2133473.2000 151504.4000 1552.4000 24 -254.00 2286529 2286530.0000 154609.2000 1513.0000 25 -253.00 2442652 2442652.3089 157628.9161 1430.8750 26 -251.00 2763635 2763635.7500 163358.7000 1471.8500 27 -250.00 2928466 2928466.3000 166302.4000 1498.7000 28 -249.00 3096267 3096267.4000 169299.8000 1626.6000 29 -248.00 3267193 3267193.800 172553.0000 1778.4000 30 -247.00 3441525 3441525.2000 176109.8000 1855.4500 31 -246.00 3619490 3619490.4500 179820.7000 1892.4500 32 -245.00 3801203 3801206.5732 183588.7518 2061.1750 33 -243.00 4176631 4176631.7500 191850.3000 1837.0000 34 -242.00 4370319 4370319.0500 195524.3000 1717.3500 35 -241.00 4567560 4567560.7000 198959.0000 1674.4500 36 -240.00 4768194 4768194.1714 202307.7786 1529.1000 37 -238.00 5178926 5178926.1500 208424.3000 1637.1500 38 -237.00 5388987 5388987.6000 211698.6000 1421.8000 39 -236.00 5602107 5602112.0875 214519.0375 1292.7750 40 -234.00 6036325 6036325.3500 219713.3000 1562.2500 41 -233.00 6257600 6257604.5268 222817.2482 1715.7750 42 -231.00 6710105 6710105.7500 229700.9000 1788.2000 43 -230.00 6941594 6941594.8500 233277.3000 1461.9850

The Salton Sea survey in February 1995 used the contour method to obtain the basic data for these tables. Close interval profiles of the underwater portion of the Sea were collected by standard surveying techniques using a DGPS and echo sounder. The above water portion was determined from USGS topography dated 1956 and photorevised in the 1970s. Reduction of the field data was completed at the Technical Service Center in Denver, Colorado.