Answer:
Coastal management refers to the technique in which natural features of the coast are maintained and protected from the threats of coastal erosion and coastal flooding.
Step-by-step explanation:
Disadvantages:
1. They are expensive
2. The wall receives direct impact and this weakens the structure over time
3. Waves scour the bases of the wall and they often need maintenance or re-development
4. The availability of adequate drainage behind the wall is necessary
5. Modern recurved walls may promote coastline erosion since they do not hinder longshore drift but act as a mere barrier
Advantages:
Absorb wave energy through the slats.
Effective for many years Can be cheap compared to other techniques