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<br /> <br />002273 <br /> <br />.. <br /> <br />1. 1ntroduction to Limnology ...............................................................................16 <br />2. Seasonal Patterns seen at Lake Powell...........................................................19 <br /> <br />3. Historic Patterns seen at Lake Powell.....:....................................................... 23 <br /> <br />___B., GLEN CANYON DAM RELEASES ...........................................................................27____._ _ <br /> <br /> <br />1. Historical trends ................. ........................ ..................................................... 27 <br /> <br />2. Seasonal Patterns............................................................................................. 29 <br /> <br />V. DISCUSSION ...........................................................,................................................30 <br /> <br />A. VALUE OF EXISTING AND PAST MONITORING PROGRAMS ...................................30 <br /> <br />B. ASSESSMENT OF FACTORS AFFECTING WATER QUALITY CONDITiONS ................31 <br />1. Meteorological Conditions ..............................................................................32 <br /> <br /> <br />2. Inflow Hydrology ................. ................ .................. .......................................... 32 <br /> <br />3. Glen Canyon Dam Operations.........................................................................34 <br /> <br />VI. CONCLUSIONS .....................................................................................................45 <br /> <br />A. INFLUENCE OF DAM OPERATIONS ON LAKE WATER QUALITY................................45 <br /> <br /> <br />1. Release volumes.......... ..... .......... ............... .......................................................46 <br /> <br /> <br />2. Timing of Reservoir Releases...........................................................................46 <br /> <br /> <br />3. Operation of non-power release structures..................................................... 46 <br /> <br /> <br />4. Changes in Variability of Downstream Releases.............................................47 <br /> <br /> <br />B. INTEGRATION WITH DOWNSTREAM SYSTEMS ......................................................48 <br /> <br /> <br />1. Grand Canyon Aquatic Ecosystem ..................................................................48 <br /> <br /> <br />2. Lake Mead........................................................................................................ 49 <br /> <br />03/06/98 <br /> <br />DRAFT <br /> <br />Page vii of 62 <br /> <br /> <br />LITERATURE CITED .................................................................................................49 <br /> <br /> <br />APPENDICES.........................................................................................,......................54 <br /> <br />ASSESSMENT PROSPECTUS.. ..... ..... ..... ........ ........ ...... ........ ........ ... ... ..... ... ........ ... ....... .54 <br />