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Table 5. Mean annual values of runoff, streamflow, dissolved-solids concentrations and loads, and major-constituent loads-Grand region
<br />[Periods of record for some sites are divided into preintervention and postintervention periods; asterisks indicate main-stem sites; mg/L, milligrams per liter; - -, not applicable]
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<br />Period
<br />Site of
<br />(table 3, record
<br />plate 1) (water
<br />years)'
<br />Runoff Streamflow
<br />(inches) (cubic
<br />(acre-feet) feet per
<br />second)
<br />Dissolved solids
<br />Flow-
<br />weighted Load
<br />concen- (tons)
<br />tration
<br />(mg/L)
<br />Major-constituent loads
<br />(tons)
<br />Sodium
<br />plus Carbonate
<br />Calcium Magnesium potassium equivalent2 Chloride Sulfate
<br />1 1976-83 -- 229,000 317 29 9,000 2,100 400 1,000 4,100 100 1,400
<br />2'^ 1947-83 4.45 196,000 270 70 19,000 4,450 800 2,000 9,300 400 1,800
<br />3 1947-83 9.10 410,000 566 288 160,000 32,300 6,400 14,300 30,600 18,300 58,400
<br />4* 1959-83 6.16 1,444,000 1,990 213 418,000 86,000 18,000 38,400 112,000 36,200 128,000
<br />5* 1942-49 7.58 1,844,000 2,550 231 579,000 98,600 21,800 82,400 125,000 105,000 146,000
<br />5* 1950-83 6.39 1,553,000 2,140 267 565,000 95,700 20,000 81,500 120,000 105,000 142,000
<br />6 1959-83 11.20 867,000 1,200 245 288,000 66,400 11,100 19,500 73,900 20,500 97,000
<br />7 1975-82 2.18 23,000 32 528 17,000 2,060 1,300 2,300 5,400 300 5,200
<br />8* 1973-82 6.33 2,490,000 3,440 395 1,336,000 184,000 42,200 247,000 229,000 324,000 310,000
<br />9 1975-80 2.49 43,000 59 568 33,000 3,720 2,800 4,700 11,600 400 9,800
<br />10* 1934-49 6.96 2,990,000 4,130 364 1,481,000 212,000 52,300 258,000 275,000 331,000 354,000
<br />10* 1950-83 6.22 2,671,000 3,690 398 1,446,000 203,000 47,400 261,000 260,000 330,000 345,000
<br />11 1969-79 3.94 124,000 172 340 57,000 8,330 4,100 8,000 24,500 1,300 11,200
<br />12 1959-80 3.32 200,000 276 1,260 344,000 51,200 16,400 35,400 31,500 3,800 205,000
<br />13 1934-65 3.87 1,636,000 2,260 610 1,357,000 204,000 69,700 144,000 181,000 22,400 736,000
<br />13 1966-83 4.00 1,691,000 2,330 557 1,281,000 196,000 68,900 127,000 176,000 19,700 694,000
<br />14 1974-80 19.30 15,000 21 1,220 25,000 3,610 1,200 3,200 2,200 2,700 12,600
<br />15 1974-83 45.50 70,000 97 1,360 130,000 18,300 7,000 15,000 10,400 13,300 66,200
<br />16 1974-82 23.10 18,000 26 914 23,000 3,250 900 3,200 2,100 3,500 10,000
<br />17 1974-83 2.92 68,000 94 1,360 125,000 16,000 6,700 15,300 9,600 11,500 66,200
<br />18* 1962-83 4.56 4,340,000 5,990 583 3,438,000 486,000 162,000 463,000 483,000 368,000 1,480,000
<br />19 1974-79 2.79 223,000 308 330 100,000 19,600 5,800 5,600 19,300 1,600 48,000
<br />20 1952-83 2.38 582,000 803 584 462,000 48,500 14,300 97,800 54,900 132,000 114,000
<br />21* 1929-49 4.19 5,391,000 7,440 580 4,255,000 563,000 203,000 621,000 592,000 443,000 1,830,000
<br />21* 1950-65 3.57 4,595,000 6,340 615 3,843,000 521,000 170,000 565,000 487,000 501,000 1,600,000
<br />21* 1966-83 3.72 4,784,000 6,600 565 3,677,000 494,000 160,000 547,000 525,000 514,000 1,440,000
<br />'All mean values are based only on those water years having estimates of the major constituents.
<br />2Carbonate equivalent is computed from alkalinity; bicarbonate is the primary dissolved form.
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