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<br />lV
<br />t,-, Table 5. Monotonic trends in seasonal dissolved-solids loads (August through October and November through February)
<br />W for gaging stations 09095500 Colorado River near Cameo, 09152500 Gunnison River near Grand Junction, and 09t63500
<br />~ Colorado River near the Colorado-Utah State line, water years 1970-93
<br /> [Trend tests done on the sum of the monthly dissolved.solids loads in each seasonal period; periods are in water years; slopes are in tons per season per
<br /> year; percent is the slope exp~ssed as percent change per year; p value is the significance level of the test; SL. significance levels. which are defined-as:
<br /> HS is highly significant, p is less than or equal to 0.01; S is significant, p is greater than 0.01 and less than or equal to 0.05: MS is marginally significant,
<br /> p is greater than 0.05 and less than or equal 10 0.10: and NS is not significant, p is greater than 0,10; <.less than}
<br /> Station Period Unadjusted seasonal load Flow-adjusted seasonal load
<br /> Slope Percent p value SL Slope Percent p value SL
<br /> August through October
<br /> 09095500 1970-93 -1,260 --{).37 0.471 NS -657 -{).19 0.252 NS -!'-t
<br /> 1980-93 -5,530 -1.61 .280 NS -524 -.15 .767 NS ;<
<br /> d
<br /> 1986--93 -17,900 -5.61 .061 MS --8,560 -2.68 .005 HS 'i
<br /> -: ~
<br /> 09152500 1970-93 -1,240 -.38 .527 NS -2,160 -.67 .010 HS ;;
<br /> -'J
<br /> 1980-93 -187 -.06 .966 NS 2.100 .65 .090 MS :r1
<br /> 1986--93 -9,590 -3.03 .356 NS -1,450 -.46 .544 NS ',,1
<br /> .,
<br /> ,-',\
<br /> 09163500 1970-93 1,230 .16 .778 NS -749 -.10 .584 NS
<br /> 1980-93 -17.500 -2.t4 .097 MS -4,310 -.53 .239 NS j'-'
<br /> "'>
<br /> <:j
<br /> 1986--93 -44,900 -5.93 .053 MS -13,900 -1.83 .128 NS
<br /> November through February
<br /> 09095500 1970-93 -1,590 -.41 .284 NS 231 .06 .652 NS
<br /> 1980-93 -4.030 -1.05 .335 NS 187 .06 .879 NS
<br /> 1986--93 -24,100 -6.31 .006 HS -6,550 -1.72 <.001 HS
<br /> 09152500 1970-93 -3,780 -1.07 .022 S -1,100 -.31 .202 NS
<br /> 1980-93 -5,210 -1.53 .179 NS 1,530 .45 .880 NS
<br /> 1986--93 -16.200 -4.97 .103 NS -388 -.12 .221 NS
<br /> 09163500 1970-93 -9,660 -1.02 .Oll S -4,460 -.47 .027 S
<br /> 1980-93 -10.200 -1.12 .259 NS 5.160 .57 .214 NS
<br /> 1986--93 -56,200 -6.23 .010 S -13,200 -1.47 .1l2 NS
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<br />TREND ANALYSIS FOR THE COLORADO AND GUNNISON RIVERS 23
<br />
<br />
<br />Table 6. Monotonic trends in the annual Grand Valley dissolved-solids load, water years t970-93
<br />
<br />[Periods are in water years; slopes are in tons per year; percent is the slope expressed as percent change per year; p value is the significance level of the
<br />trend test; SL, significance levels, which are: HS is highly significant, p is less than or equal to 0,01; S is significant, p is greater than 0,01 and less than or
<br />equal to 0.05; MS is marginally significant, p is greater than 0,05 and less than or equal to 0.10; and NS is not significant, p is greater than 0.10]
<br />
<br />Period Slope Percent p value SL
<br />1970-93 -6,730 -1.27 0.168 NS
<br />1980-93 -17,000 -3.22 .031 S
<br />1986--93 -28,700 -6.14 .104 NS
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