Document Sample mwr-058-09-0362 Powered By Docstoc
362                                      MONTHLY WEATHER REVIEW
SEPTEMBER,  with the break-up of ice. I n both years storms have
times alum is closely correlated with turbidity and occurred
during the &st 10 days of December. High
plankton. In most cases the increased B. coli is coordi-
plankton count is fairly well timed with high turbidity.
nated with increased wind velocity, increased plankton, This is
expected since part of the turbidity consists of              or
thaws in winter and ice flow in spring. The average plankton.
Thus both are associated with water turn-
daily gallons of water run per filter (between washes) over.
High plankton counts extend into June each year
shows that when turbidity and plankton are low as in probably
because of increased light and favorable grow-
winter, the filter run is