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<br />O1j27~5 <br /> <br />CONTENTS <br /> <br />Abstract.................................................................................................................................................................................1 <br />lntroduction...........................................................................................................................................................................2 <br />Purpose and scope ..................................................................................................................................................... 2 <br />Approach ...................... ................................................................................................. ............................................ 2 <br />Basin characteristics ......... ................ ............... .......................................................................................................... 5 <br />Surface-water hydrology ........................................................................................................................................... 5 <br />Sediment transport ................................................................................................................................................................ 14 <br />Loads .................................. ....................................................................................................................................... 15 <br />Retention in reservoirs ...... ..................... .................................................................................................................... 26 <br />Water-quality characteristics and loads................................................................................................................................. 29 <br />Onsite measurements ................................................................................................................................................. 29 <br />Water temperature ................................... ....................................................................................................... 29 <br />Specific conductance ...................................................................................................................................... 31 <br />pH................................................................................................................................................................... 31 <br />Dissolved oxygen ........................................................................................................................................... 31 <br />Major ions and dissolved-solids loads....................................................................................................................... 36 <br />Nutrients ..................................... ..................................................................................... .......................................... 47 <br />Trace constituents ...................................................................................................................................................... 54 <br />Summary ................. ................................. ............................................................................................................................. 66 <br />Selected references.. ......... ..................................................................................................................................................... 68 <br /> <br />FIGURES <br /> <br />I. Map showing location of the White River Basin and primary sampling and secondary data sites ...................... 3 <br />2. Map showing generalized structure and bedrock geology.................................................................................... 6 <br />3. Hydrographs showing daily stream discharge and maximum, average, and minimum daily stream discharge <br /> <br />at site 4, water years 1975-88 ................................................................................................................................ 7 <br />4-28. Graphs showing: <br />4. Correlation of calculated (water years 1975-88) and measured (water years 1983-88) annual stream <br />discharge at site 5 and calculated (water years 1975-82) and measured (water years 1983-88) annual <br />stream discharge at site 6 with measured annual stream discharge at site 4................................................. 8 <br />5. Average and range of annual stream discharge for the North Fork (site I), the South Fork (site 2), and <br />the main stem of the White River (sites 3A-6), water years 1975-88, and annual stream discharge <br />gain-loss for segments of the White River between sites ............................................................................. 9 <br />6. Flow-duration curves for selected sites on the White River ......................................................................... 14 <br />7. Relation of annual stream discharge in the White River at site 3A to early April and early May <br />measurements of snowpack at the Burrow Mountain snow course, water years 1952-88 ........................... 15 <br />8. The relation of periodic measurements of suspended-sediment loads to stream discharge at site 6, <br />water years 1983-88 ...................................................................................................................................... 16 <br />9. Correlation of estimated (water years 1975-82) and measured (water years 1983-88) annual <br />suspended-sediment loads at sites 5 and 6 and measured annual suspended-sediment loads at site 4 <br />(water years 1975-88) and station 09306300 (water years 1975-81) with annual stream discharge............ 24 <br />10. Average and range of annual suspended-sediment loads for the North Fork (site I), the South Fork <br />(site 2), and the main stem of the White River (sites 3A-6), water years 1975-88, and annual <br />suspended-sediment loads for segments of the White River between sites.................................................. 25 <br />1 I. Volume displacement from retained fluvial sediment in reservoirs .............................................................. 27 <br />12. Estimates of annual loss of initial reservoir capacity for possible reservoirs constructed on the <br />White River at or near sites 1-6 .................................................................................................................... 29 <br />13. Correlation of periodic measurements of water temperature and stream discharge at sites 1-6, <br /> <br />water years 1975-88 .......... ............... .............. ............................. .................................................................. 30 <br /> <br />CONTENTS III <br />