|
0
<br />Table 9. Mean annual values of runoff, streamflow, dissolved-solids concentrations and loads, and major-constituent loads-San Juan 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]
<br />
<br />
<br />Site
<br />(table 3,
<br />plate 1)
<br />Period
<br />of
<br />record
<br />(water
<br />years)'
<br />
<br />Runoff
<br />(inches)
<br />
<br />Streamflow
<br />(cubic
<br />(acre-feet) feet per
<br />second) Dissolved solids
<br />Flow-
<br />weighted Load
<br />concen- (tons)
<br />tration
<br />(mg/L)
<br />
<br />
<br />
<br />
<br />alcium
<br />
<br />
<br />
<br />
<br />agnesium Major-constituent loads
<br />(tons)
<br />
<br />Sodium
<br />plus Carbonate
<br />potassium equivalent2
<br />
<br />
<br />
<br />
<br />hloride
<br />
<br />
<br />
<br />
<br />ulfate
<br />58 1969-76 0.26 57,000 78 1,110 85,000 13,500 3,000 10,100 6,800 8,300 43,700
<br />59 1951-56 2.17 8,380,000 11,600 580 6,616,000 887,000 321,000 950,000 1,020,000 659,000 2,780,000
<br />60 1963-83 26.8 103,000 142 34 4,800 1,200 300 200 1,900 100 1,100
<br />61* 1956-61 5.45 947,000 1,310 163 210,000 39,700 8,520 25,000 68,000 5,000 63,800
<br />61* 1964-83 4.80 835,000 1,150 166 188,000 37,600 7,200 20,600 58,600 3,400 61,100
<br />62 1955-83 8.06 585,000 807 263 209,000 46,800 6,500 17,100 49,000 9,000 80,800
<br />63* 1962-82 3.43 1,327,000 1,830 256 462,000 89,900 12,800 52,300 107,000 11,900 188,000
<br />64 1977-83 .13 31,000 42 801 33,000 3,600 900 6,200 2,800 2,200 17,800
<br />65* 1958-61 2.09 1,440,000 1,990 324 634,000 110,000 17,300 82,400 123,000 25,100 276,000
<br />65* 1964-83 2.00 1,379,000 1,900 324 607,000 107,000 19,100 76,000 121,000 18,300 274,000
<br />66 1977-82 2.79 45,000 62 666 41,000 5,700 2,800 3,500 4,000 500 24,300
<br />67 1978-81 1.99 37,000 51 2,210 110,000 13,700 8,400 9,300 7,400 2,300 69,100
<br />68* 1930-61 1.39 1,710,000 2,360 413 961,000 165,000 36,000 115,000 180,000 27,000 438,000
<br />68* 1964-83 1.26 1,545,000 2,130 467 981,000 149,000 40,800 120,000 173,000 33,600 465,000
<br />69* 1942-62 2.01 11,520,000 15,900 539 8,443,000 1,220,000 381,000 1,170,000 1,430,000 752,000 3,490,000
<br />69* 1966-80 1.53 8,754,000 12,100 564 6,714,000 885,000 311,000 983,000 954,000 640,000 2,940,000
<br />69* 1981-83 1.98 11,360,000 15,700 520 8,039,000 1,040,000 382,000 1,190,000 1,200,000 765,000 3,460,000
<br />70 1948-50 .23 17,000 24 1,340 32,000 3,700 1,500 4,200 2,600 600 19,100
<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.
|