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USGS Water Quality and Sucker Distribution Update 9/23/04

USGS Update Table of Contents

Water temperatures were again lower this week.  Daytime temperatures in our
study area ranged from 11.2 to 16.4 'C (all but one site ranged from 11.2
to 13.2  'C).  Dissolved oxygen concentrations were higher this week and
ranged from 7.3 to 11.8 mg/L.  The highest and lowest concentrations were
found  in the northern portion of the study area (7.3 and 11.8 mg/L) while
the range of values in the south was relatively narrow (8.8 to 10.0 mg/L).
Levels of pH continued to increase.  The range of pH values, 8.6 to 10.0,
was essentially unchanged from last week, but only one site had a pH below
9.0 as compared to six sites last week.  The distribution of radio-tagged
adult suckers continued to increase with fish scattered in an area
stretching from the mouth of Pelican Bay south into Ball Bay east to Eagle
Point and south to Bare Island.  A few fish were also located in the lower
Williamson River.

These data are preliminary and are being provided as a qualitative
assessment of lake conditions and fish distributions.  Only daytime
conditions collected by our water quality crews as they visit each
monitoring site in our study area (all of Upper Klamath Lake north of Bare
Island including Ball and Shoalwater bays, but excluding Agency Lake)
during the course of the week are reported.  They are not meant to be
representative of the full range of conditions occurring throughout the day
and night nor representative of conditions in all areas of the lake.





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