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<br />REGIONAL ANALYSES OF STREAMFLOW CHARACTERISTICS <br /> <br />5 <br /> <br />. <br /> <br />1220 <br /> <br />. <br /> <br />~ <br />0-1 <br />o~ <br />~-:1" <br />-to <br /> <br /> <br />480 <br /> <br />, <br /> <br />1350 <br /> <br />R. <br /> <br />1345 <br /> <br />. <br /> <br />o <br />I <br /> <br />10 <br />I <br /> <br />20 MILES <br />I <br /> <br />2. Map of Snohomish River stream system showing location of gaging stations listed in table 1. <br /> <br />$ select the most highly related variable and test <br />it for significance; then select the next most <br />highly related variable, compute the regres- <br />sion on the two, and test for significance; then <br />proceed similarly until all the significant vari- <br />ables are included in the regression. A follow- <br />ing "Model and Parameters" section covers <br />the selection of independent variables in more <br />detail. <br /> <br />Using the data of table 1, regressions for the <br />2- and 50-year flood have been defined by com- <br />puter. They are <br /> <br />log Q, = -2.07 + 0.954 log A + 1.96 log P <br />log Q50 = -2.07 + 0.955 log A + 2.16 log P, <br /> <br />. <br /> <br />for which the standard errors are 0.16 and <br />0.12 log units respectively. All regression co- <br />