Risk assessment of Typhoons and storm surges disasters of Qinhuangdao
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Through the statistical analysis of meteorological and oceanographic data of Qinhuangdao in the past 70 years, we found that there is about one typhoon landing in Qinhuangdao in about every 2-3 years, which induces heavy rain, strong wind and even storm surge. Typhoons that landed in the Bohai Bay in the past decade have increased significantly. In particular, there were three typhoons landing in 2018, and the disasters caused by the growth of the landing typhoons show an increasing trend. According to the comprehensive strength formula of typhoon and wind and rain assessment, the typhoon is divided into three levels: the first type is strong typhoons: causing strong winds or heavy storm surges, which can cause serious natural disasters, such as falling crops, flooding, collapsed buildings and facilities, casualties, distressed sea vessels, and flooded coastal zones. The second type is relative strong typhoons: accompanied with large precipitation (50-100mm), strong winds (maximum wind speed of 10-10m/s in 10 minutes, maximum wind speed between 13.6-17m/s), or water exceeding warning level with high tide but without strong winds. It may cause serious disasters, but it is as serious as the first type. The third type is weak typhoons with no disaster. Qinhuangdao is located at north side of the Bohai Sea and its coastline is in the northeast-southwest direction. In addition to the typhoons, the weather system that causes the storm surge in Qinhuangdao also includes the strong extratropical cyclones which are accompanied with large southeast wind component (generally the maximum wind speed of 10 minutes is greater than 10m/s, the maximum wind speed is greater than 17 m/s) , winds in the northwest direction will lead the water away from the coast. If this wind effect is compound with the astronomical tide, it can cause storm surges.
- © 2019, the Authors. Published by Atlantis Press.
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Cite this article
TY - CONF AU - Suli Sun AU - Wanlei Zhang AU - Zhizheng Mao AU - Chenyu Zhang PY - 2019/11 DA - 2019/11 TI - Risk assessment of Typhoons and storm surges disasters of Qinhuangdao BT - Proceedings of the Fourth Symposium on Disaster Risk Analysis and Management in Chinese Littoral Regions (DRAMCLR 2019) PB - Atlantis Press SP - 169 EP - 175 SN - 1951-6851 UR - https://doi.org/10.2991/dramclr-19.2019.14 DO - https://doi.org/10.2991/dramclr-19.2019.14 ID - Sun2019/11 ER -