Beach Behavior

Coast is a dynamic interaction between water, wind and soil materials. Water and wind move from one place to another, eroding the soil and then deposited so that the shoreline changes. The process of coastal change is a dynamic process, and if this continues it will interfere with the activities around the coast, because it will happen or erosion and accretion in the coastal area. According to Kakisina (2004) beach behavior can generally be categorized into 3 types, namely:

1. The beach is eroded (erossion coast).
Coastal erosion of the shoreline setback to the ground, which can damage residential areas and urban infrastructure. Beach erosion can occur naturally due to wave attack or because of human activities in the form of mangrove deforestation, taking coral beach, port development, reclamation and others.

2. The beach is stable (stable coast).
The beach is basically the same stable with the eroded coast beaches where stable behavior is constant. This means that although the volume profile fluctuates, but overall volume is not changed with time.

3. Beach accretion (acresting coast).
Beach accretion mechanism is also similar to coastal erosion and a stable, only shoreline moves toward the sea. This means that fluctuations in the volume of the profile increases with time.