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<br />~'_:~,:.;,;~~~~.>'sL:". '.'; .C-J-'i.~);..,_-~,,~ -'."~"'''-'''-;::_;'';~;''-4'iQ.",4''L,o.,~_ .,""___.',, <br /> <br />>"'0'.-"''''- ,.~ <br /> <br />00 <br />G:.J <br />!n <br /> <br />(- :" <br /> <br />r. ") <br /> <br />32 <br /> <br />'-- <br /> <br />RIO GRANDE COMPACT COMMISSION REPORT <br /> <br />ACCURACY OF RECORDS <br /> <br />The Rules and Regulations of the Commission state that the equipment, method, and frequency of <br />measurement at each gaging station shall be sufficient to obtain records at least equal in accuracy <br />to those classified as ngoodft by the U.S. Geological Survey. Within the physical limitations of <br />stream gaging, the agencies obtaining the records at Compact gaging stations have complied with <br />these regulations. <br /> <br />The accuracy of streamflow records depends <br />discharge relation or, if the control is unstable, <br />the accuracy of observations of stage, measurements <br /> <br />primarily on <br />the frequency <br />of discharge, <br /> <br />(1) the stability of the stage- <br />of discharge measurements, and (2) <br />and interpretation of records. <br /> <br />The station description states the degree of accuracy attributed to the records. -Excellent" <br />means that about 95 percent of the daily discharges are within 5 percent of the true value; "good- <br />within 10 percent; and nfairn within 15 percent. Records that do not meet the criteria mentioned <br />are rated ftpoor.n Different accuracies may be attributed to different parts of a given record. The <br />probable error in a monthly or annual mean discharge depends more on the distribution of the daily <br />errors between the limits than it does on the limits themselves. For this reason, monthly and <br />annual records are more accurate than most daily records. The number of significant figures and <br />rounding limits used are those as employed by the U.S. Geological Survey. <br /> <br /> <br /> <br />1::':~;:;''i;;'tt~ "'~iiffr~ <br /> <br />i[~~m#r.~Ii~. <br />,....,...'.';..........r..~'..~(?oI!'~!o., <br />,.",', , ,...~:'''\,'.:''' ....;.;x;JI <br />'-": '~::', '!<.~:'~.~~:"A',:jf <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />.,...,,_..<<;'~..~ <br /> <br /> <br />~~, <br />