Policy
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After reviewing the whole website, please
contact us
if you have additional
questions...we try to
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| Issues related to the extreme high
tides and low tides 'engineered" for Steamboat Slough over the last few
years |
| Letter to Central Valley Flood Control Board |
centralvalleyfloodmgt-corrected.pdf |
Click on the map above to go to a larger view of this 1945 plan for
flood control for the Sacramento River and its tributaries. It
looks just like the 2011 draft map from the Central Valley Flood Control
Board. The problem with using 1945 flood flow estimates in 2011 is
that the capacity of the wateways has greatly diminished during the last
65 years due to silting in that rases the river beds. |
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Click on the graphic above to see a timeline
showing how the Snug Harbor peninsula incidents of inundation due to
engineered high tides over the last 12+ years has increased in frequency
substantially. What has changed to cause the high water incidents?
(1) F&G artificial "pulse" flows for the salmonoid fish studies; (2) a
bottleneck effect caused by the CALFED/BDCP restoration
project/experiment on Grand Island south of Steamboat Slough, coupled
with the channel bench added a few years ago off Ryer Island; (3)
silting of the channel bed due to the stoppage of flow at the
"bottleneck" location, and several other factors; (4) hinderance to
flood flows caused by the increase of invasive species along both sides
or banks of Steamboat Slough. |
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