The arbitration board will then have 10 minutes to make the final decision on whether to permit construction of the jetty. At the end of this process, hand out the map showing the coastline of today and engage further discussion. The direction and strength of the currents depends on wave heights and direction. Over the coarse of a year there can be a net flow of water and sediment in one direction. Seasonal changes in weather patterns change the predominant direction of the wind and subsequently the waves.
Wind can play a major part in moving sand on the beach face, sand flats and dunes.
Storms will throw sand up onto the beach, higher than normal sea level. Once sand is above sea level, then wind can directly transport sand. Sand is moved along the beach both by the longshore current and by wind. Waves can strike the beach at an angle, moving sand up along with it, but the water flows back down the beach at a right angle to the coast line. The effect is a zig-zag pattern, which results in transport of sand along the beach.