Datagov Opendata Platform

1. Waisandingzhou is the largest sandbar in Taiwan and also a natural barrier for the Yunjia coast. However, due to complex factors such as reduced sediment input from rivers, development of nearby coastal and offshore industrial areas, and the effects of the northeast monsoon and long-term wave action, erosion and retreat issues exist on Waisandingzhou, leading to a reduction in the coastal sand source in the region. This results in the gradual disappearance of the natural barrier along the Yunjia coastal area, posing a serious threat to the lives and properties of the people, making it urgent to devise strategies for erosion control and prevention.2. Considering the sensitivity of the coastal environment and avoiding irreversible impacts, the relevant erosion control work on Waisandingzhou needs to be carefully evaluated. It is essential to grasp basic coastal environmental data and understand the mechanism of coastal erosion as a priority, in order to further develop comprehensive coastal environmental protection strategies in line with the long-term development needs of the country.3. In the current (Year 109) fiscal year, this institute has carried out the "Yunjia Coast (Waisandingzhou) Erosion Control Research Commissioned Professional Services Project." The institute has begun to collect and organize past relevant surveys and research literature on Waisandingzhou, completed the analysis of basic coastal data in the region, assessed important factors in landform changes to establish a long-term coastal landform change calculation model, and predicted future landform changes to discuss protection strategy options.