Coastal Management and Sea Level Changes
Coastal management is absolutely crucial as sea levels rise due to melting ice caps and thermal expansion of seawater. You've got two main approaches to tackle this challenge.
Hard engineering solutions like seawalls reflect wave energy but they're expensive eyesores. Groynes reduce wave energy and longshore drift cost-effectively, whilst gabions absorb energy but require loads of labour to build.
Soft engineering involves beach replenishment with sand and shingle, creating natural barriers that move slowly along the coastline. This approach works with nature rather than against it.
Key Point: Sea level rise affects coastal areas through two main processes - always remember both thermal expansion AND melting ice when explaining causes!
Wave types determine coastal formation. Constructive waves have strong swash and weak backwash, creating gently sloping beaches. Destructive waves do the opposite - weak swash, strong backwash - forming steep beaches through powerful erosion.
