According to the provided reference, seawalls primarily offer protection against natural coastal processes.
Based on the reference, seawalls provide benefits that relate to the natural environment by protecting land and structures from its impact. The advantages listed, which can be considered environmental benefits in terms of interaction with coastal processes, focus on preventing erosion and flooding.
The specific benefits mentioned in the reference are:
- Protects the base of cliffs, land and buildings against erosion.
- Can prevent coastal flooding in some areas.
These functions help to stabilize the coastline, preventing the loss of land and safeguarding areas from inundation by the sea. While the reference also mentions groynes preventing longshore drift and allowing beach build-up, these are distinct from the benefits of seawalls.
