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Index
 CSL Heron Squamish Operations
April-October 2017

2004-2017 Channel Evolution

John E.Hughes Clarke, Anand Hiroji, Liam Cahill Ian Church,  Angela Gillis
Center for Coastal and Ocean Mapping
University of New Hampshire, USA
 Ocean Mapping Group
University of New Brunswick, Canada



The South Channel

To try and get a feel for the annual scale evolution of the channel, sections are presented along the talweg for each year, and the difference in those sections from year to year calculated. Note that, as the talweg is continuously migrating laterally, the sectino has to be shifted occasionally.

Talweg Profile Evolution:
All Talweg Profiles

The full evolution.

Top black line is the current "levee" profile
 talweg
2008-2011 profiles

first initiation
 early
2011-2013 profiles

The reversal in early 2012
 mid
2013-2017 profiles

entrenchment.
 late
2017 current profiles
 2017




Annual Changes:

The following images illustrate the long term changes over periods of half or whole years.

diff
diff prof
Summer and Winter 2008

diff
diff prof
2 summers - 09 and 10

diff
diff prof

diff
diff prof

diff
diff prof

diff
diff prof

diff
diff prof

diff
diff prof
Summer and Winter 2015


diff
diff profile
Summer 2016

over winter
diff profile
Winter 2016-2017

low discharge
diff profile
early spring 2017


may to june
diff profile
early summer 2017







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