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<br />.-,.~ 4t ~
<br />"'0.1.(
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<br />CONTENTS
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<br />Abstract" ,.....,...' ....'"", ,.. ,......, ,.. ,.......,..,..., ,..,." ...... .'......,..',..,..,..,..,..,...."""""".....,..." ,.'"" ,.',.."""",.....",... ,., ,..... "'."" '..'.' I
<br />Introduction.................,.. ,.. ..'..... ,....... ...,..,.....,.. .................'.................. '.... ......... ........... '..... '................. ........... .............. ....... 2
<br />Purpose and scope ,.....,.... ,. ..,..',.... ......". ...... .........'..',..,... ...."......." ....,... ............, ...'" '......'""" ................ ,.........',. '...'" 4
<br />Description of Pueblo Reservoir and reservoir operations .......,................................................................................. 4
<br />Water quality of the upper Arkansas River Basin........,.,......,.......,.......,.................................,...,...........,................,.. 7
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<br />Methods of investigation.........,' ,...........'." ,...'"..,..,..,..,.."...."....,..,..,....'.,... '. '.'""..".""".. ,....""",.... ,......""",.."""..., 10
<br />Acknowledgments ........'" '.,.. ,.'"...,..",."", ,....., ..'.....', '...." '....."..,..,.',.. ..... ,... ,. ,...', ,.".."""",.."""",.."......".", '...'..', '..' I ]
<br />Physical characteristics ... ,...'"""......",... ,........... ......, .... '....,....."......"..,..,... .......'"",....'"....."""" ..........,. ,.., ......'""""....."", II
<br />Thennal stratification and mixing patterns .............'.'...'.,....""",.....,.................."...,..",""....""",.""....."....',.....'""" 12
<br />Specific-<:onductance stratification and mi xing patterns, ...... ,.,..,.....' ,...'....,....,..".....", ,., ,.. ,..........."" ,...'"""", ,...",.." 15
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<br />Reservoir residence times.. ........... ..... .......... ....... ............... .................. .......... ...... ... ........... ................. ........................ 15
<br />Water transparency.., '....,..,....,...,.,. ............. ,. '....' ...,........""...., ...".., ....."..,'.'".......".,..""".,.,.. ,..........' '.', ,. '.,.."""....,.. 18
<br />Distribution and transport of particulate matter .'..............."......"........,..,.,.."'.....,...,..".."",,........'...."..'....',.."",.."", 21
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<br />Chemical characteristics .... ......... ..,. .....,..,...." ...,.", ,.. ,..., ,. ...... ......., '.... ,.. ,....."",..,....... ,....', .........'"",....,......."" ,... .......,. ....... 21
<br />Dissolved oxygen and pH .....,..."......., ,.................' '..." ....'"".......""..",..........,." '..'""...",."""",.........""", ,. '...'", ....', 23
<br />Dissolved solids ...... .... ...... ..,....... ..,....". ...... ..... ,......'....., ,....', '.. ...."....",.. ............ ,...' .'... '........"""... ....",.,..... ...... .... ,... 27
<br />Nitrogen and phosphorus ........ .......,..."" '........,...." ,..., ......,... ,.. ................ ......."",.,..., .... ..........,.., ,....'..'.'""" .......... ,... 29
<br />Trace elements", ,.. ,...... ..........., '......""""....,.................., .........'..,....., '......... ,...,.... ....... ,.., ,. ,......".'""".....""".. ..........., 34
<br />Total organic carbon....... '.......' '......".."" ....,.... .......... ,. .... ,.... .'....,...."....... ,.. ,........ '.....""".. ......".."""......,.".." .....'..", 46
<br />Radiochemicals .... '....'"..,... ...... ........,..... ,.,....',........',....., ............ ,.... ...........",....", ,....,....... ................. ,....'..'.'",....."", 46
<br />Biological characteristics....,"" ,......... ,... '..','......,.........,.....,...... ......., .'.. ,..", '......."",....... ,.. .......... ,..........."... ...........",..,.,...., 49
<br />Chlorophy II a .'"""....."",..... ,..,........,.....'".....,...,....".....,... ,.... .... ,.... .'.' '.,.."",....."""..".."".... ,..... ......"" ,. ,....".'"....", 49
<br />Phytoplankton....,,' '.,.."""""..", ,.,. ,..,.....'".....,...,..,..,.....""...." ... ,.... ...""..,...,..".."",.."...""",..., ,........" ....... '..'",.. ..'" 50
<br />Occurrence of phytoplankton.,.....," '....,...,....,......" ,. ,..... ... '.."...,.....""".."..""..".."",..., ,...... ..... ,., ,..... ,.'.'" ...".' 50
<br />Temporal variation of phytoplankton...,...,............... ....... ,. '..,'.'"....."",... ...".., ,.........,.., ,.............. '........,.." ,...." 52
<br />Seasonal succession of dominant and abundant phytoplankton ..........,..........,................................................. 52
<br />Comparison of phytoplankton data for 1988 and 1989 with 1985 to 1987....................................................., 60
<br />Relations of phytoplankton to waler-quality conditions ...............,........,.............,..................'......................... 60
<br />Water quality and reservoir-operation considerations...... ................_ ........................................ .... ........................... ............. 65
<br />Summary ....... ....'", ,., ,.......",.. ........ ,. ........., ,..'",....",..",......... .... ,..... '.... '.',..,.........",....." ,......"..." '., ,.......'..... ,.. ,....'..'"..,....", 66
<br />Selected references.. .......... .... ,....'.... .....,..".."" ,................., ,.' .'.. '...',... ....".. ,., ............. .... ,......".'", ,. '...',..""",... ....""",....."", 69
<br />
<br />PLATE
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<br />[In pocket]
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<br />I, Map showing location of water-quality sampling sites on Pueblo Reservoir
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<br />CONTENTS III
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