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<br />i/,} ~: ' <br /> <br />0004 <br /> <br />CONTENTS <br /> <br />Page <br />Abstract----------------------------------------------------------------- 1 <br />Introduction------------------------------------------------------------- 1 <br />Purpose and scope--------------------------------------------------- 2 <br />Description of Pueblo Reservoir------------------------------------- 2 <br />Sampling-site locations and types and methods of data <br />collection and analyses------------------------------------------------ 4 <br />Results------------------------------------------------------------------ 6 <br />Selected references------------------------------------------------------ 8 <br />Water-quality data for Pueblo Reservoir---------------------------------- 18 <br />Onsite water-quality measurements----------------------------------- 18 <br />Light. transparency--------------------------------------------- 18 <br />Water temperature, pH, dissolved oxygen, and <br />specific conductance----------------------------------------- 31 <br />Water-quality analyses---------------------------------------------- 180 <br />Turbidity------------------------------------------------------ 180 <br />Major ions----------------------------------------------------- 199 <br />Nitrogen and phosphorus---------------------------------------- 221 <br />Trace elements------------------------------------------------- 252 <br />Radiochemical constituents------------------------------------- 275 <br />Total organic carbon------------------------------------------- 277 <br />Chemical analyses of bottom material-------------------------------- 280 <br />Biological analyses------------------------------------------------- 300 <br />Phytoplankton-------------------------------------------------- 300 <br />Chlorophyll s-------------------------------------------------- 341 <br />Zooplankton---------------------------------------------------- 344 <br />Water-quality data for the upper Arkansas River basin-------------------- 362 <br />Onsite water-quality measurements----------------------------------- 362 <br />Water-quality analyses---------------------------------------------- 370 <br />Turbidity------------------------------------------------------ 370 <br />Major ions----------------------------------------------------- 373 <br />Nitrogen and phosphorus---------------------------------------- 385 <br />Trace elements------------------------------------------------- ~92 <br />Total organic carbon------------------------------------------- 404 <br />Suspended-sediment analyses----------------------------------------- 407 <br /> <br />PLATES <br />[In pocket] <br /> <br />Plate 1. Map showing location of water-quality sampling sites on <br />Pueblo Reservoir. <br />2. Map showing location of water-quality stations and <br />streamflow-monitoring stations, upper Arkansas <br />River basin between Leadville and Pueblo, Colorado. <br /> <br />FIGURES <br /> <br />Page <br /> <br />Figures 1-9. Graphs showing selected profiles of water temperature, <br />pH, dissolved oxygen, and specific conductance at <br />Pueblo Reservoir: <br />1. Site 3B for June, August, October, and <br />December, 1985------------------------------------ 9 <br /> <br />iii <br />