The classification and grading of sea area is the making collecting standard for the sea area using charge, and it is also the premise and basis for carrying out the appraisal of sea area asset price. Based on the technical guidelines for sea area grading (Trial implementation) and following the principles of resource endowment difference, income difference, economical utilization and ecological sea use, we selected two grading factors of sea natural conditions and sea area location conditions, and 10 assessment factors, such as seawater quality, marine natural disasters, et al., and then established the index quality assessment system of Shenzhen bathing beaches grading. Using the comprehensive index assessment method, we could get the scores of 207 assessment units, and use cluster analysis method and coefficient of variation (CV) to check the level. Finally, the bathing beaches are divided into three levels: level-Ⅰ(22.22%), level-Ⅱ(33.82%) and level-Ⅲ(43.96%). The research results provide a basis to evaluate the reference price of different levels bathing beaches for the marine management department in Shenzhen.
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