Updates on the Collaroy seawall from @wendy_harmer š.
This is one of many ways to manage our #coasts & deal with #erosion issues. š§µ[1/5]
Other options include:
1. Do nothing. This is cheap in theory but may have hidden costs due to having to deal with the impacts of erosion.
This is one of many ways to manage our #coasts & deal with #erosion issues. š§µ[1/5]
Other options include:
1. Do nothing. This is cheap in theory but may have hidden costs due to having to deal with the impacts of erosion.
https://twitter.com/wendy_harmer/status/1446295664636227587
2. Retreat and relocate. This involves moving infrastructure and property back away from the area of risk and allowing the coast to do its thing in a more natural manner. There are big challenges with how you do this and manage people who own beachfront property.
š§µ[2/5]
š§µ[2/5]
3. Soft engineering solutions. This includes doing things like beach nourishment and rebuilding dunes using "soft" approaches like fences. It has costs and does not provide a hard line beyond which the beach cannot erode.
š§µ[3/5]
š§µ[3/5]
https://twitter.com/wendy_harmer/status/1446295664636227587
4. Hard engineering solutions. This includes things like seawalls and breakwaters and can be combined with other approaches like beach nourishment. It provides a hard line beyond which the beach doesn't erode but can add to erosion problems.
š§µ [4/5]
š§µ [4/5]
Which option/s a community chooses depends on a whole lot of things including how much money they have and what is most important to them.
There is no one size fits all for #CoastalManagement and these problems will only get harder with #ClimateChange and #SeaLevelRise
š§µ[5/5]
There is no one size fits all for #CoastalManagement and these problems will only get harder with #ClimateChange and #SeaLevelRise
š§µ[5/5]
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