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.
|
Equation Number |
Elevation |
Capacity |
Coefficient |
Coefficient |
Coefficient |
|
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.
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