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<br />OO~g!~ <br /> <br />CONTENTS <br /> <br />~ <br /> <br />Abstract----------------------------------------------------------------- <br />Introduction------------------------------------------------------------- <br />Purpose and scope--------------------------------------------------- <br />Study area---------------------------------------------------------- <br />Acknowledgments----------------------------------------------------- <br />Location and extent of study reaches for traveltime and reaeration <br />measurements------------------------------------------------------ <br />Determination of traveltime and longitudinal-dispersion characteristics-- <br />Dye-tracer technique------------------------------------------------ <br />Traveltime---------~------------------------------------------------ <br />Longitudinal dispersion--------------------------------------------- <br />Results of traveltime studies--------------------------------------- <br />Mean velocity and discharge------------------------------------ <br />Graphical analysis of traveltime data-------------------------- <br />Traveltime simulations using linear-regression relationships--- <br />Longitudinal-dispersion coefficients--------------------------- <br />Determination of reaeration coefficients using a modified-tracer <br />technique---------------------------------------------------- <br />Peak method--------------------------------------------------------- <br />Calculation of reaeration coefficients------------------------------ <br />Experimental procedure---------------------------------------------- <br />Injection of the tracers--------------------------------------- <br />Sampling the tracers------------------------------------------- <br />Sample analysis------------------------------------------------ <br />Computation of reaeration coefficients------------------------------ <br />Comparison of measured reaeration coefficients and values predicted <br />using semi-empirical and empirical equations----------------- <br />Semi-empirical (energy-dissipation) equations------------------ <br />Empirical (velocity-depth) equations--------------------------- <br />Results of comparison------------------------------------------ <br />Basin characteristics---------------------------------------------------- <br />Characteristics measured from topographic maps---------------------- <br />Maximum 24-hour precipitation--------------------------------------- <br />Characteristics measured from aerial photographs-------------------- <br />Pools and riffles---------------------------------------------- <br />Channel width and depth---------------------------------------- <br />Stream temperature--------------------------------------------- <br />Summary------------------------------------------------------------------ <br />Selected references------------------------------------------------------ <br /> <br />l <br /> <br />iii <br /> <br />Page <br />1 <br />1 <br />2 <br />2 <br />4 <br /> <br />4 <br />4 <br />7 <br />7 <br />7 <br />9 <br />9 <br />13 <br />13 <br />18 <br /> <br />25 <br />25 <br />26 <br />26 <br />27 <br />27 <br />27 <br />27 <br /> <br />30 <br />33 <br />34 <br />35 <br />35 <br />39 <br />45 <br />45 <br />48 <br />48 <br />48 <br />52 <br />53 <br /> <br />. ~ <br />