Print Email Facebook Twitter Frequency Analysis of Storm-Surge-Induced Flooding for the Huangpu River in Shanghai, China Title Frequency Analysis of Storm-Surge-Induced Flooding for the Huangpu River in Shanghai, China Author Ke, Q. (TU Delft Hydraulic Structures and Flood Risk) Jonkman, Sebastiaan N. (TU Delft Hydraulic Structures and Flood Risk) van Gelder, P.H.A.J.M. (TU Delft Safety and Security Science) Bricker, J.D. (TU Delft Hydraulic Structures and Flood Risk) Date 2018 Abstract Shanghai, as a coastal city, is vulnerable to various types of flooding. The floodwalls along the Huangpu River provide protection against typhoon-induced flooding. However, there is limited insight into the actual safety level of the flood defences in Shanghai, and recent failures have highlighted their vulnerability. Therefore, the aims of this paper are to derive a series of new flood frequency curves for the Huangpu River, and to evaluate the level of protection of the floodwall system. This paper analysed over 100 years (1912–2013) of annual maximum water levels for three stations at near-sea, mid-stream and inland locations along the Huangpu River. Best-fit curves were determined for a number of selected probability distributions using statistical performance indicators. As a result, new flood frequency curves of the water levels for different storm surge return periods were produced. The results showed that generalised extreme value (GEV) was identified as the most suitable probability distribution for the datasets. Analysis showed that the current design water levels correspond to exceedance probabilities of 1/500 per year at the near-sea and mid-stream stations, and no more than 1/50 per year at the inland station of the Huangpu River, whereas the intended safety standard is 1/1000 per year. A comparison of the findings with a dataset of the crest heights of the floodwalls showed that the current protection level of the floodwalls along the Huangpu River is expected to be around 1/50 per year in terms of overtopping for the lowest sections. The results of this study can be utilized to provide future recommendations for flood risk management in Shanghai Subject frequency analysisstorm surgeflood riskprotection levelHuangpu RiverOA-Fund TU Delft To reference this document use: http://resolver.tudelft.nl/uuid:6e857a91-19b4-40cc-8ccb-ffa23c889a39 DOI https://doi.org/10.3390/jmse6020070 ISSN 2077-1312 Source Journal of Marine Science and Engineering, 6 (2) Part of collection Institutional Repository Document type journal article Rights © 2018 Q. Ke, Sebastiaan N. Jonkman, P.H.A.J.M. van Gelder, J.D. Bricker Files PDF jmse_06_00070.pdf 6.75 MB Close viewer /islandora/object/uuid:6e857a91-19b4-40cc-8ccb-ffa23c889a39/datastream/OBJ/view