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<br />TABLE OF CONTENTS <br /> <br />LIST OF TABLES . .................. .......................................................................................... v <br /> <br /> <br />LIST OF FIGURES....................... ...................................... ............................................. vi <br /> <br /> <br />LIST OF KEY WORDS ......... .......................................... .............................................. vii <br /> <br /> <br />EXECUTIVE SUMMARy...... .................... .............................. ............ ............ ............ viii <br /> <br /> <br /> <br />INTRODUCTION. .............................................. ........... .................................................... 1 <br /> <br />Background - The Objectives of Habitat and Channel Maintenance ..................... 1 <br /> <br /> <br />Background - Channel and Habitat Maintenance in Relation to the Geomorphic <br /> <br /> <br />Concepts of Effective and Bankfull Discharge ..........................................2 <br /> <br /> <br />Background - Geomorphic Research about the White River and Its Relationship <br /> <br /> <br />To the Requirements of Endangered Fish .................................................. 3 <br />Overview of the White River and Description ofthe Study Site. ..........................6 <br /> <br /> <br /> <br />METHODS ........................................................................................................................ 9 <br /> <br /> <br />Flood Frequency Analysis....................... .......... ..................................................... 9 <br /> <br /> <br />Topographic Mapping. .... ......... ...... ....... ......... .... ......... ......................................... 10 <br /> <br />Identifying Bankfull Discharge and the Active Floodplain ................................. 11 <br /> <br /> <br /> <br />Cross Sections ............ ....... ............................................ ....................................... 11 <br /> <br /> <br />Calculating Effective Discharge From Sediment Records ................................... 13 <br /> <br /> <br />Analysis of Discharge Records to Determine Threshold Discharges .................. 13 <br /> <br /> <br />Determination of Dso Particle Sizes ............................ ......... ................................ 15 <br /> <br /> <br />Calculation of Average Boundary and Critical Shear Stresses ............................ 16 <br /> <br /> <br /> <br />RESULTS ....................................................................................... ................................. 17 <br /> <br />111 <br />