Geosynthetics are a softer, more flexible example of a coastal structure that are used to stabilize slopes. Geosynthetics can be separated into two groups: geotextiles and geogrids (Kim et al., 2019).

 

A geotextile is a permeable layer of polymer, fabric, yarn, or other geosynthetic material. Geogrids are similar but the material is arranged in a grid. Geogrids are also stronger and can hold heavier tension loads (Kim et al., 2019). 

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Factors that affect how long a geosynthetic will be effective are the type of material used and the environment in which the geotextile is placed. Some environmental factors include pH and temperature of the water, soil, and air. 

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Geosynthetics can be effective shoreline stabilization methods on their own or can help to strengthen revetments.

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Decision Matrices Results:

 

Dublin Hollow site: 3.58 / 5.0

 

Dam site: 3.48 / 5.0

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Pros:

1.  Easy to maintain

2. Long life span

3. Optimal wave protection

4. Easy to install

Cons:

1.  Very high in cost

2. Poor habitat potential