1. The main causes of erosion in Waikiki Beach were the making of building that were put very close to the shoreline and the removal of the close pier which sped up the erosion a little bit. The former of the two has been happening slowly since the late 19th century.
2. There have been a few attempts to fix the erosion problems, such as small attempts like mats on the beach to cross over eroded areas and sandbags to keep the water from seeping into the beach. These are small fixes, but not long term ones that will last a few years. They have also done things such as beach maintenance in the early part of the new year since 2012. This would bring most of the beach back towards its former glory.
3. Economically, because of the loss of sand due to erosion, less and less people are on the beach, especially during high tide where the water is so close to the buildings you can barely put one row of chairs on the beach. Less people on the beach means less earned money for people who work on the beach, either in the hotels or the shops and food places. Environmentally, not only is there a lack of dry sand, there are also worries that the water could get contaminated from the storm drains and flooding of the roads close to the beach. Socially, many might become homeless if floods were to happen, although this might only affect the people closer to the beach. Another issue is the possibility of contaminated water. Many might put themselves at risk if they drink it and make themselves sick. Finally, many might lose their jobs from not making money if the tourism is very low.
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