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原文传递 Modeling the Hydrodynamic Performance of a Conceptual Storm Surge Barrier System for the Galveston Bay Region

题名：	Modeling the Hydrodynamic Performance of a Conceptual Storm Surge Barrier System for the Galveston Bay Region
其他题名：	ADCIRC[Computer software].AquaVeo,Provo,UT.
正文语种：	英文
作者：	Jacob M. Torres
关键词：	Storm surge;Surge barrier;Surge protection;Galveston Bay;Houston Ship Channel;SWAN+ADCIRC;Hurricane Ike;Proxy storms;Flood risk
摘要：	For Galveston Bay and much of the Upper Texas Gulf Coast, the havoc imparted by the hurricanes of 1900 and 1915, in addition to Hurricane Ike of 2008, served to expose the growing and unmitigated flood risks for the surrounding local communities, ecosystems, and economies. Previous studies have proposed methods for regional storm surge protection but have emphasized either (1) localized protection for specific areas or (2) shortening of the coastline with structural barrier systems placed across major tidal inlets and barrier islands. In this study, a new storm surge reduction strategy—the Mid-Bay Strategy (MBS)—was developed that incorporates functional elements from each approach and takes advantage of existing dredged material and disposal sites adjacent to the Houston Ship Channel (HSC) near the middle of Galveston Bay (i.e., the Mid-Bay). TheMBS consists of a set of interacting components that includes the beneficial use of dredged material, wetland restoration, elevated roadways, and a primary gate structure across the navigable HSC within Galveston Bay. The final design and implementation of such components will likely depend on the availability of federal, state, and local funding sources, thereby influencing the final design-build costs, scheduling, and constructability. The objective of this study was to provide a planning-level assessment of the hydrodynamic performance of theMBS under two phases of constructed implementation using a coupled hydrodynamic computational model. A suite of hurricane events, including historical, pseudosynthetic, and fully synthetic events, was used to evaluate the dredgedMBS bermheights for each phase of construction. In Phases 1 and 2, the optimal berm heights for storm surge reduction were identified as 7.3 m (24 ft) and 6.1 m (20 ft), respectively, for a specific proxy storm. The maximum storm surge reduction ranged from 4.57 m (15 ft) to 5.33 m (17.5 ft) for west and north Galveston Bay, respectively, for Phases 1 and 2. Additional hurricanes were simulated to analyze theMBS's optimized level of effective protection. Overall, the results show that the MBS was able to provide sufficient storm surge protection for all storms within the evaluation suite. In addition, this work highlights the importance of selecting appropriate proxy storms for achieving reliable and rapid assessments of the performance of conceptual stormsurge protection strategies.
出版年：	2017
论文唯一标识：	P-108Y2017V143N05026
英文栏目名称：	CASE STUDIES
doi：	10.1061/(ASCE)WW.1943-5460.0000389
期刊名称：	Journal of Waterway, Port, Coastal, and Ocean Engineering
拼音刊名(出版物代码)：	P-108
卷：	143
期：	05
页码：	323-339