Along Wreck Beach the existing headland cliffs are eroding
and receding under attack from terrestrial and marine agents.
Valuable property is being lost and nearby structures endangered.
Remedial measures were undertaken in the summer of 1974
to halt wave erosion along the cliff base. A rock groin and
sand—gravel protective beach scheme was only partially success
ful during the following year. To design an adequate protection
system for the cliffs wind and wave effects need to be deter
mined to fully understand the resulting sand movement patterns.
Understanding the processes affecting Wreck Beach is the first
step in controlling them.
Methods used to investigate sand movement included field
coverage of the study area in photographic form as well as
instrument cross—sectioning over a two year period. These data
were correlated with historical wind records and predictions
from wave refraction diagrams to determine seasonal movement
onto and off the beach face and the cyclic progression of
sandbars in the longshore current direction. Annual sand trans
port volumes, sand supply sources and amounts contributed are
outlined.
In designing a protection scheme in which longshore trans
port requirements must be considered the information and calcu
lations suggests that the Fraser River North Arm could amply
provide the longshore transport supply requirements. However,
some means in addition to the present natural processes must
be available to bring this sand into a range where wind gen
erated wave activity can incorporate it into the existing
Wreck Beach system. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/19885 |
| Date | January 1975 |
| Creators | Pool, Meridith Ines |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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