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<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008>Hi everybody,</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008>Following up on Rainer's idea, I looked at the monthly
mean flow data for the Napa River at Oak Knoll, in search of the elusive
Long-Term Trend. The graph below shows mean monthly discharge as a pct of
annual discharge, for the periods BEFORE and AFTER 1980 (in blue and red,
respectively). There are interesting differences but I see nothing to
suggest a definite shift in the annual hydrograph. You'll note, for
example, that the April runoff is reduced but that May, June etc. are increased,
changes which might conceivably be important but are probably more related to
random variation in rainfall timing. These differences are much smaller
than the shift in annual peak from January to February, which I do attribute to
random rainfall variation. </SPAN></FONT><FONT face=Arial color=#0000ff
size=2><SPAN class=903354818-09102008>The curve for 2004-07 shows more of the
same. </SPAN></FONT><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008>The new spreadsheet is attached.</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008>Does anybody have any more ideas? I have about
concluded that there is no basis for scoring flow persistence (whether we call
it dry season flow, late flow, or whatever) in Napa this time around.
Maybe next time we'll have the dry reach data Sonoma has. I will wait for
guidance from Deanne and Caitlin before writing anything further on this
Indicator. </SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008></SPAN></FONT> </DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008>Bob</SPAN></FONT></DIV>
<DIV dir=ltr align=left><FONT face=Arial color=#0000ff size=2><SPAN
class=903354818-09102008> </SPAN></FONT><BR><SPAN
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