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<br />I <br />I <br />, I <br /> <br />Station Description <br /> <br />Detailed station-description information is included for every <br />station in the study. Paragraph headings in each description are <br />self-explanatory. <br /> <br />I <br />I <br />I <br />I <br /> <br />Each station has been assigned an 8-digit number such as <br />07112700. The first two digits, "07," refer to the major drainage and <br />place the station in the Arkansas River basin. The remaining six <br />digits index the station relative to existing stations by the <br />downstream order system. <br /> <br />In this report, stations are listed alphabetically, and grouped <br />under the heading "Urban Stations" for the Denver metropolitan area, <br />and "Highway Stations" for the rural environment of eastern and <br />southwestern Colorado. <br /> <br />I <br />I <br />I <br />I <br />II <br />II <br />I <br /> <br />Rainfall <br /> <br />Rainfall data consists of a computer printout showing a <br />tabulation of 5-minute incremental precipitation during the storm that <br />produced the runoff event. The tabulation of precipitation intervals <br />does not begin until the precipitation in a 5-minute interval exceeds <br />0.015 inch. Thus, it is possible to show a daily total of precipitation <br />that is larger than a storm total that occurred in the same day. This <br />is due to the accumulation of rainfall increments of less than 0.015 inch <br />per 5-minute interval prior to the initiation of the storm detail <br />tabulation. Details of duration, time, depth, and intensity are <br />provided whenever a storm equals or exceeds 0.50 inch. The storm <br />tabulation is terminated when 2 hours elapse and no incremental <br />precipitation is recorded. <br /> <br />Runoff <br /> <br />I <br />I <br />I <br />I <br />I <br /> <br />A computer program developed by the U.S. Geological Survey uses <br />the stage-discharge relation at a gage to convert the punched stage <br />data into a printout of gage height and discharge versus time. A <br />gage height of 10.00 feet represents the condition of the float <br />resting on the bottom of the well. In most cases, discharges below <br />a gage height of 10.00 feet must be estimated because the intakes <br />to the gage well are above the bottom of the channel. Occasionally, <br />because of silt in the gage well, a stage greater than 10.00 feet <br />will be recorded for a period of time. The discharge hydrograph must <br />be estimated for these periods because the recorded stage does not <br />represent the stage in the stream. <br /> <br />9 <br />