Estimated sand transport

Vertical aerial photograph of the project area with an arrow to show the direction of net northward sand supply under predominantly south east wave conditions

Sand flows northwards along the northern NSW coast at a rate estimated to be in the order of 500,000 m3 per year. This is due to a natural coastal process called longshore drift and the amount is estimated to vary from 250,000 m3 to 1,000,000 m3 each year depending on the wave conditions. The amount of sand that travels north along Letitia Beach is estimated by TRESBP using a simplified sand transport model.