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<br />81:0r <br /> <br />Table 7. - Significant long-term trends in concentration (mg/(L'a)) by nonlinear regression of the residence time <br />equation. Associated trends (kg/(s'a)~ for solute loads are in parentheses - Continued <br /> <br />______~__M_______________________________________________.___.___.___.___.____________.__.____.__._______._._______________._'__._. <br /> <br />PERIOD' SEASON <br /> <br />CALCIUM <br /> <br />MAGNESIUM <br /> <br />SODIUM <br /> <br />CHLORIDE <br /> <br />SULFATE <br /> <br />BICARBONATE <br /> <br />SUM OF SIX IONS <br /> <br />-------------._-.---.------_.--_.---------.-_.------------------------------------------------~----------------------------_.-----. <br /> <br />SAN JUAN BAStN <br /> <br />'" <br />CI <br /> <br />SlATtON 9379500 <br />1929-61 DEO-MAR <br />"'1\'1-JUNf. <br />AUG-NOV <br /> <br />ShN JUAN RIVER NEAR BLUFF, UTMI <br />13 ( -.004) <br /> <br />NEGATIVE <br /> <br />-.06( .Ot2) <br />-.07( -.0031 <br /> <br />. t5( <br />.03( <br />.08( <br /> <br />.0041 <br />.006) <br />,003) <br /> <br />-.35( -,063) <br />-.55( -.023) <br /> <br />NEGA TI VE <br /> <br />NEGATIVE <br /> <br />LOWER COLORADO BASIN <br /> <br />STATION 9380000 - COLORADO R AT LEES FERRY, AZ. <br /> <br />1927-61 DEC-MAR <br />MAY-';UNE <br />AUG-NOV <br /> <br />.2H .2711 <br /> <br />-.571 -.108) <br />- .08( -. t061 <br />-.23( -.05~1 <br /> <br />-.471 -.088) <br />-.50( -.119) <br /> <br />-2.19( - .419) <br /> <br />-2.1()( -.398) <br /> <br />POSITIVE <br /> <br />STATiON 9402500 - COLORADO R. NEAR GRANO CANYON, <br /> <br />1925-61 DEe-MAR <br />M^Y-JUNE <br />AUG-NOV <br /> <br />.13 ( .0261- <br />.4H .544} <br /> <br />-. IS! -.031) <br /> <br />.31 ( -.064) <br /> <br />-1.12( -.231) <br /> <br />.S6( . t\S) <br />.801 1.058) <br />POSI TIVE <br /> <br />-1.27( -.261) <br />2.00( 2.661) <br /> <br />-,Og! -.024) <br /> <br />- .32 ( -.084) <br /> <br />