1Probabilistic Tsunami Risk Assessment of Main Islands and Reefs in the South China SeaZHAO Guang-sheng, NIU Xiao-jing1-92Experimental Study on the State of Waves Within Harbor Under the Action of SurgesLI Hui, MAO Yan-jun, WANG Hao-tian, Sang Gao-ya, ZHENG Zhen-jun, MA Xiao-zhou10-193Numerical Study on Optimization of Impulse Air Turbines for OWC Wave Energy ConversionZHANG Zhen, LIU Zhen, ZHANG Xiao-xia20-284Annual Changes Characteristics of Beach Topography in the Northeastern Bays of Hainan ProinceWU Duo-yu, ZHANG Hang-fei, ZHANG Dong-qiang, FU Guang-juan29-365Structural Analysis of Phytoplankton Community in Adj acent Waters of a Sewage Treatment Plant in ShanghaiYU Yang, ZHANG Yi-wen, LIU Jing, YIN Jie37-476A Simulation Study on Influence of the Construction of Jiaolai Canal on the Water Exchange and Marine Environment in the Laizhou BaySU Bo, ZHU Jin-long, WANG Jia-ying, ZHAO Yu-ting, WANG Li-ming, MA Yuan-qing48-587SeaBeam Full-Depth Multi-beam Echo-sounder System and Its ApplicationLI Zhi-yaun, DOU Hu-lin, ZHANG Hai-quan59-678Theoretical Research and Application of Artificial Coastal Ecological Restoration Based on Ecological Construction: a Case Study in Tianj in Yongding New River Estuary Comprehensive Rehabilitation Proj ectQIAO Yan-long, YIN Xiao-ya, ZHANG Zheng-xin68-759Application and Prospect of Blockchain Technology in Marine FieldsHAN Lu-yao, LIANG Jian-feng, SONG Xiao, ZHENG Bing76-82