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<br />.. <br /> <br />Part 1 _ General (Contd) <br /> <br />-. <br /> <br />another and disappear in long-time averages. During usually prevailing <br />periods when total stream flows are oommonly and largely usable and use~. <br />the probable inaoouracies in the streamflow data are similar in extent <br />and charaoter to those in the diversion data, exoept at times in winter <br /> <br /> <br />when ice-oonditions distort gage heights and interfere with acourate <br /> <br /> <br />measurement. Inaoouraoy in the data is probably greatest during in_ <br /> <br /> <br />frequent periods of major floods, when rates and volumes of flow are <br /> <br />abnormal, ohannel oonditions are unstable, and direot measurements are <br /> <br />diffioult, if not impossible, to make. Comparisons at suoh times may give <br />misleading results. The inolusion in totals of suoh infrequen~ and abnormal <br />volumes, whether aocurately or inaocurately determined, tend to distort <br />the long_time average values, and may therefore lead to false water_supply <br />oonolusions, sinoe no one oan forecast with aoouraoy either the frequenoy <br /> <br />or the magnitude of major floods or exoessive preoipitation and runoff. <br /> <br />i <br /> <br />. <br /> <br />-~ <br />