中文摘要：

海岸线变化和危险的知识对为沿海的地区的管理和发展负责的本地政府部门很重要。沿着海南岛的海岸学习变化和危险的性质，我们整个最后几年收集了很多沉积样品，并且重建由联合沉积谷物尺寸分析和航海的 charts/TM RS 的数据的海岸线的变化想象。与从侵蚀是几乎自由的相反(是从调查结果期望海岸线处于一个相对稳定的州)，在海南的四个主要城市(即， Haikou ， Wenchang ， Sanya 和 Changjiang )结果被受不了中等沿海的危险首先因为在海岸线上强加可观的压力的大人口。因此，包括人为、自然的因素，在这研究利用的评价方法论用作一个有用工具为本地管理获得海岸线危险的全面理解，以沿海的管理和改编。

英文摘要：

Knowledge of coastline changes and vulnerability is of great importance to local government departments that are responsible for the management and development of coastal zones.To study the nature of change and vulnerability along the coasts of the Hainan Island,we collected a large number of sediment samples through the last few years,and reconstructed the changes of the coastline by combining the data of sediment grain-size analysis and the nautical charts/TM RS imaginary.Contrary to being almost free from erosion（as expected from the findings that the coastlines are in a relatively stable state）,four major cities in Hainan（i.e.,Haikou,Wenchang,Sanya and Changjiang） turned out to be suffered from a moderate coastal vulnerability primarily because of the large populations that impose considerable pressure on the coastlines.Thus,the assessment methodology utilized in this study,including both anthropogenic and natural factors,serves as a useful tool to obtain a comprehensive understanding of coastline vulnerability for local government,in terms of coastal management and adaptation.