BEACH EROSION IN KUTA BEACH, BALI AND ITS STABILIZATION

摘要

Due to the construction of an airport runway, severe beech erosion has taken place on the Kuta beach, a coral-sand beach in Bali. Introducing the most effective wave for beach change in terms of wave transformation on a coral reef, the long-term shoreline change is predicted with changing the positions for the boundary conditions to be used as headlands for stabilizing the beach in the large scale coastal behavior. We could find a possibility of stabilizing the beach against beach erosion by constructing three headlands at the positions found. In this beach, a very small amount of sediment source can only be produced from the activity of sea animals. On the basis of the long-term shoreline change and the theory of the formation of static stable beaches, therefore, a methodology for coral-sand beach stabilization was proposed, and parts of this were constructed. Further improvement for the headlands is needed, but as of 1989, a static stable coral-sand beach has been well-formed between the headlands.