There are many soft engineering methods:
Using natural features (Retreat the line) - Abbots Hall Farm
This is where hard engineering is moved or breached to allow natural mudflats and salt marshes to develop
Sand dune stabilisation
This is when sand dunes, that would naturally shift along the shore as a result of wind or wave power, are artificially held in place. Stabilising dunes, using sand fencing or vegetation, increases their effectiveness as a sea defence. It also stops the dunes 'migrating' into developed backshore areas.
Beach recharge
This is when the beaches are built up again or restored using sand from elsewhere. It is also called beach re nourishment
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