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<br />~!</:'~>:-,::<-:,;::.,;:;:~:..::);~;;J:i:.c-, .<i-'.i:: ;: '::~',:. ~;:-ll-:,-,.";_.~" j.; ::_ -,. '_c. -,. ..,,~i""'""'.ii".h.,,<;,;-," ;". '."" ''', ; ;''-.-'', '<".",,_ .,_" ~., <br /> <br />~ 29 <br />(0 <br />00 <br /> <br />( ~) <br /> <br />. , <br />....... <br /> <br />RIO GRANDE COMPACT COMMISSION REPORT <br />ACCURACY OF RECORDS <br /> <br />\...".':) <br /> <br />The Rules and Regulations of the Commission state that the equipment, method, and <br />frequency of measurement at each gaging station shall be sufficient to obtain records at least <br />equal in accuracy to those classified as "good" by the U.S. Geological Survey. Within the physical <br />limitations of stream gaging, the agencies obtaining the records at Compact gaging stations have <br />complied with these regulations. <br /> <br />, The accuracy of streamflow records depends primarily on (I) the stability of the stage- <br />discharge relation or, if the control is unstable, the frequency of discharge measurements. and (2) <br />the accuracy of observations of stage, measurements of discharge, 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 "fair" within 15 percent. Records that do not meet the criteria mentioned are <br />rated "poor." 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 <br />daily 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. <br /> <br /> <br />-.... <br /> <br />