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Coastal protection using building with nature concept:A case study from Chongming Dongtan Shoal,China

Acta Oceanologica Sinica 2021年第10期40卷 152-166页

作者： Zhentao Chong Min Zhang Jiahong Wen Luyang Wang Jie Mi jeremy bricker Stanley Nmor Zhijun Dai School of Environmental and Geographical Sciences Shanghai Normal UniversityShanghai 200234China State Key Laboratory of Estuarine and Coastal Research(East China Normal University) Shanghai 200241China Department of Hydraulic Engineering Delft University of Technology2628 CN DelftThe Netherlands Department of Civil&Environmental Engineering University of MichiganAnn ArborMI 48109USA Department of Estuarine and Delta Systems Royal Netherlands Institute for Sea Research4400 AC YersekeThe Netherlands

With climate change and rising sea levels,the coastal zone’s flood risk is *** researches have shown a gradually degrading capacity of traditional hard engineering structures(e.g.,seawall,dikes)on flood mitigation due to problems such as land subsidence and insufficient *** remedy the defects,the"building with nature concept"for coastal protection with saltmarshes was examined by combining field measurements and numerical *** advantages of saltmarsh over traditional seawall on flood protection was demonstrated from the perspective of both flood area mitigation and economic gain,based on scenario *** show that tidal wetlands are essential in mitigating significant wave heights(Hs)and current velocities even during storm *** storm wave and current velocity reduction ratio(RRw and RRc)by saltmarshes on Chongming Dongtan Shoal(CMDS)during Typhoon 9711 is approximately 11%and 51%,*** wave and current mitigation by Scirpus mariqueter are more efficient than Spartina alterniflora and Phragmites australis during measurements in 2010,which were approximately 0.3 m and 0.2 m/s,0.125 m and 0.155 m/s,0.086 m and 0.128 m/s per kilometer width,*** summer saltmarsh area 54.2 km2 on CMDS protects approximately 32 km^(2)land area behind the seawall from being flooded,equivalent to the seawall heightening of approximately 0.42 m on equivalent flood *** performance of cost-and-benefit analysis shows a relatively higher(by 3%–7%)net present value(NPV)and a higher(by 1.5 times)benefit-cost ratio(BC)of nature-based solution(i.e.,saltmarsh restoration)compared with traditional hard engineering solution(i.e.,seawall construction).Thus,building seawall with nature,such as a hybrid flood protection measure,should be implemented in the future coastal redesign and maintenance.

关键词： nature-based flood protection storm wave mitigation numerical simulation cost-benefit analysis Chongming Dongtan Shoal

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Damage Curves Derived from Hurricane Ike in the West of Galveston Bay Based on Insurance Claims and Hydrodynamic Simulations

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International Journal of Disaster Risk Science 2023年第6期14卷 932-946页

作者： Chaoran Xu Benjamin T.Nelson-Mercer jeremy D.bricker Meri Davlasheridze Ashley D.Ross Jianjun Jia State Key Laboratory of Estuarine and Coastal Research School of Marine SciencesEast China Normal UniversityShanghai 200241China Department of Civil and Environmental Engineering University of MichiganAnn ArborMI 48109USA Department of Marine and Coastal Environmental Science Texas A&M University at GalvestonGalvestonTX 77553USA Faculty of Civil Engineering and Geosciences Delft University of Technology2628 CN DelftThe Netherlands

Hurricane Ike,which struck the United States in September 2008,was the ninth most expensive hurricane in terms of *** caused nearly USD 30 billion in damage after making landfall on the Bolivar Peninsula,*** used the Delft3dFM/SWAN hydrodynamic and spectral wave model to simulate the storm surge inundation around Galveston Bay during Hurricane *** curves were established through the relationship between eight hydrodynamic parameters(water depth,flow velocity,unit discharge,flow momentum flux,significant wave height,wave energy flux,total water depth(flow depth plus wave height),and total(flow plus wave)force)simulated by the model and National Flood Insurance Program(NFIP)insurance damage *** NFIP insurance database contains a large amount of building damage data,building stories,and elevation,as well as other information from the Ike *** found that the damage curves are sensitive to the model grid resolution,building elevation,and the number of *** also found that the resulting damage functions are steeper than those developed for residential structures in many other locations.

关键词： Delft3d-FM Flood risk Hurricane Ike Residential damage ratio SWAN Weibull function

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Perspectives on Compound Flooding in Chinese Estuary Regions

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International Journal of Disaster Risk Science 2023年第2期14卷 269-279页

作者： Hanqing Xu Elisa Ragno Jinkai Tan Alessandro Antonini jeremy D.bricker Sebastiaan N.Jonkman Qing Liu Jun Wang Institute of Eco-Chongming(IEC) Key Laboratory of Geographic Information Science of Ministry of Education and School of Geographic SciencesEast China Normal UniversityShanghai200241China Faculty of Civil Engineering and Geosciences Delft University of Technology2628 CNDelftThe Netherlands School of Atmospheric Sciences and Key Laboratory of Tropical Atmosphere-Ocean System of Ministry of Education Sun Yat-sen UniversityZhuhai519082China Department of Civil and Environmental Engineering University of MichiganAnn ArborMI48109USA

Extreme surges and rainfall represent major driving factors for compound flooding in estuary regions along the Chinese *** combined effect of extreme surges and rainfall(that is,compound floods)might lead to greater impacts than if the drivers occurred in ***,understanding the frequency and severity of compound flooding is important for improving flood hazard assessment and compound flood resilience in coastal *** this study,we examined the dependence between extreme surges and corresponding rainfall events in 26 catchments along the Chinese coastline during typhoon and non-typhoon seasons using copula functions,to identify where the two drivers more often occur together and the implication for flood management in these *** found that the interaction between flood drivers is statistically significant in 10catchments located around Hainan Island(south)and Shanghai,where surge peaks occur mainly during the typhoon season and around the Bohai Sea(north),where surge peaks occur mainly during the non-typhoon *** further applied the copula-based framework to model the dependence between surge peaks and associated rainfall and estimate their joint and conditional probability in two specific locations—Hainan Island and the Bohai Sea,where the correlation between flood drivers is statistically *** observed that in Hainan Island where most of the surge peaks occur during the typhoon season,extreme rainfall events during the typhoon season are generally more intense compared to annual maxima *** contrast,around the Bohai Sea where surge peaks occur mainly outside the typhoon season,rainfall is less intense than annual maxima *** results show that the interaction between extreme surges and rainfall can provide valuable insight when designing coastal and urban infrastructure,especially in highly populated urban areas prone to both coastal and pluvial flooding,such as many Chinese coastal cities.

关键词： China Coastal catchments Compound flooding Copula function Extreme surge Optimal threshold

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