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<br />2 <br /> <br />Basin: <br /> <br />. <br /> <br />..... <br />~ <br />w <br />,..,. <br /> <br />I. T"atersheds (above station) 100% within <br /> PAA 14-A <br />II. "'atErsheds (above station) 50 - 99~ wi thin <br /> RAA 14-6.- <br />III. "!atersheds ( abcve station) 51 - 100% within <br /> RAA 14-B <br /> <br />As you will recoll, each RAA includes a part of the <br /> <br />Basin which is relatively uniform in hydrology, geology, <br />and climate, likewise in fish and wildlife habitat end <br />recreational resources. 2treams of similar size within <br />each RAA thus should have similarities in stream geo- <br />mor~hology, rip~ian vegetation, fish Epecies assemblages, <br />and temp~rature patterns. TO the extent that there is a <br />combination of the cold water end cool water influences, <br />as in Groups II ?nd III, there will be an inter&rading <br />of the specific RAA characteristics. <br /> <br />5. Augmenting size classification by the addition of average <br />annual flow data to that on watershed size. <br /> <br />. <br /> <br />The reference uEed in this case was the U.S. GeOlogical <br />"'Urvey nublication titled Surface vater SUP1l1f of the <br />Uni ted states 1 66-1970 Part 9 Volume 1 Co orado River <br />fas n a ove Green River and Va ume I Co ora 0 ~ ver <br />Basin from Sreen River to Comnact POlnt. <br /> <br />In the case of many stations, long term average annual <br />discharge was not available. This was explained in the <br />introductions to the above documents: <br /> <br />"Average discharge for a station is not given for <br />stations having fewer than 5 cocplete yeexs of <br />record or for stations where changes in water develop- <br />ment during the period of record cause the figures <br />to have 11 ttle significance." <br /> <br />As will be readily seen in the Analysis, watershed area <br />without some index as to flow would be quite meaningless. <br />en the basis of average annual flow, Classes which con- <br />tain more than one stream may be further broken down into <br />two or more Subclasses. <br /> <br />The S~2rY shows: <br /> <br />. <br /> <br />1. The total number of U.S.G.S. gaging stations used in the <br />Analysis within each Clase in each Group. <br /> <br />2. The number of stations (in parenthesis) used in estimat- <br />ing the aver~e annual discharge from an area equal to <br />that of the median watershed in the Class.(see column 5 <br />and appropriate footnotes). <br />