Author:
Publisher:
ISBN:
Category : Barrier islands
Languages : en
Pages : 66
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Hurricane Frederic made landfall near Pascagoula, Mississippi at midnight, September 13, 1979. At the time of landfall, the central pressure had dropped to 946 mb; onshore winds in excess of 200 km/hr were lashing the Alabama coastline, and the open coast storm tide peaked at 365 cm at Gulf Shores, Alabama. Vertical aerial photography obtained in 1976 and again 9 days after Frederic made landfall, combined with multiple reconnaissance overflights and ground surveys by the authors, provided the data base for determination of shoreline erosion and the deposition of hurricane scour and sedimentary deposits. Erosion of the Gulf beach at Dauphin Island proved to follow a predictable pattern, controlled by nearshore bathymetry, whereas retreat of the shoreline of the Mississippi Sound margin was an unexpected occurrence. Apparently, this retreat was due to a hydraulic jump as washover currents entered the deep water of Mississippi Sound. Large-scale sediment redistribution on Dauphin Island proper was a consequence of the storm surge flood. The ebb surge, however, was responsible for the reopening of three inlets across Little Dauphin Island. The wave-induced property destruction on Dauphin Island was most intense immediately west of the area of high dunes. This segment of the island, the easternmost portion of the Holocene spit, has been breached twice in this century. During future storm events, breaching, or at the very least severe property destruction, in this area seems inevitable. A sensible land use plan for Dauphin Island should include a search for alternative, and potentially safer, areas for development.
Author: Barry D. Keim
Publisher: LSU Press
ISBN: 0807146315
Category : Nature
Languages : en
Pages : 359
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"The storm has entered the Gulf." For those who live or travel near the Gulf of Mexico, this ominous announcement commands attention, especially given the frequency and force of hurricane strikes in recent years. Since 2004, the shores around the Gulf of Mexico have been in the crosshairs for an increasing number of hurricanes and tropical storms, including Charley and Wilma in southwestern Florida and Ivan, Dennis, Katrina, Rita, Gustav, and Ike along the northern Gulf coast from Panama City to near Galveston. In this definitive guide, climatologists Barry D. Keim and Robert A. Muller examine the big picture of Gulf hurricanes -- from the 1800s to the present and from Key West, Florida, to Mexico's Yucatan Peninsula -- providing an extraordinary compilation and interpretation of the entire region's hurricane and tropical storm history. Drawing from their own research and from National Hurricane Center records, Keim and Muller examine numerous individual Gulf storms, considering each hurricane's origin, oceanic and atmospheric influences, seasonality, track, intensity, size, point of landfall, storm surge, and impact on life, property, and the environment. They describe the unique features of the Gulf that influence the development of hurricanes, such as the loop current and its eddies, and identify areas of the coastline that are more or less vulnerable because of physical environment, socioeconomic environment, or both. They point out that the increase in population along the Gulf Coast over the past century has led to a rise in hurricane damage as once sparse coastlines are now lined with residents, commerce, and industry. In addition, they assess predicted hurricane activity for coming years in light of competing climate theories as well as cyclical patterns over the past century. Keim and Muller begin their book by scrutinizing the Gulf's deadliest storm, the Galveston Hurricane of 1900, whose victims received little to no warning of its approach. They then retrace 2005's Hurricane Katrina, the most costly storm, using NHC advisories and reports. Their comparison of these two catastrophic events shows that despite 105 years of tremendous technological advances, hurricanes remain ultimately rather unpredictable and human warning, readiness, and response measures continue to be imperfect. Keim and Muller also detail other memorable Gulf storms -- the Labor Day Hurricane of 1935, Audrey, Betsy, Camille, Gilbert, Andrew, Wilma, and more -- and give the hurricane strike records from 1901 to 2005 at thirty locations around the Gulf. They extend the New Orleans hurricane strike record back to the middle of the nineteenth century, providing key insight into comparisons of storm activities during the two centuries. An epilogue summarizes the destructive 2008 hurricane season, including storms Dolly, Gustav, and Ike. Plentiful maps, charts, tables, graphs, and photos, along with anecdotal observations and an informative text, make Hurricanes of the Gulf of Mexico a captivating and useful volume for Gulf residents, storm trackers, or anyone fascinated by the weather.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309475848
Category : Science
Languages : en
Pages : 157
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The U.S. Gulf Coast provides a valuable setting to study deeply connected natural and human interactions and feedbacks that have led to a complex, interconnected coastal system. The physical landscape in the region has changed significantly due to broad-scale, long-term processes such as coastal subsidence and river sediment deposition as well as short-term episodic events such as hurricanes. Modifications from human activities, including building levees and canals and constructing buildings and roads, have left their own imprint on the natural landscape. This coupled natural-human coastal system and the individual aspects within it (physical, ecological, and human) are under increased pressure from accelerating environmental stressors such as sea level rise, intensifying hurricanes, and continued population increase with its accompanying coastal development. Promoting the resilience and maintaining the habitability of the Gulf Coast into the future will need improved understanding of the coupled natural-human coastal system, as well as effective sharing of this understanding in support of decision-making and policies. Understanding the Long-term Evolution of the Coupled Natural-Human Coastal System presents a research agenda meant to enable a better understanding of the multiple and interconnected factors that influence long-term processes along the Gulf Coast. This report identifies scientific and technical gaps in understanding the interactions and feedbacks between human and natural processes, defines essential components of a research and development program in response to the identified gaps, and develops priorities for critical areas of research.
Author: Committee on U.S. Army Corps of Engineers Water Resources Science, Engineering, and Planning: Coastal Risk Reduction
Publisher:
ISBN: 9780309305860
Category : Nature
Languages : en
Pages : 0
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Hurricane- and coastal-storm-related losses have increased substantially during the past century, largely due to increases in population and development in the most susceptible coastal areas. Climate change poses additional threats to coastal communities from sea level rise and possible increases in strength of the largest hurricanes. Several large cities in the United States have extensive assets at risk to coastal storms, along with countless smaller cities and developed areas. The devastation from Superstorm Sandy has heightened the nation's awareness of these vulnerabilities. What can we do to better prepare for and respond to the increasing risks of loss? Reducing Coastal Risk on the East and Gulf Coasts reviews the coastal risk-reduction strategies and levels of protection that have been used along the United States East and Gulf Coasts to reduce the impacts of coastal flooding associated with storm surges. This report evaluates their effectiveness in terms of economic return, protection of life safety, and minimization of environmental effects. According to this report, the vast majority of the funding for coastal risk-related issues is provided only after a disaster occurs. This report calls for the development of a national vision for coastal risk management that includes a long-term view, regional solutions, and recognition of the full array of economic, social, environmental, and life-safety benefits that come from risk reduction efforts. To support this vision, Reducing Coastal Risk states that a national coastal risk assessment is needed to identify those areas with the greatest risks that are high priorities for risk reduction efforts. The report discusses the implications of expanding the extent and levels of coastal storm surge protection in terms of operation and maintenance costs and the availability of resources. Reducing Coastal Risk recommends that benefit-cost analysis, constrained by acceptable risk criteria and other important environmental and social factors, be used as a framework for evaluating national investments in coastal risk reduction. The recommendations of this report will assist engineers, planners and policy makers at national, regional, state, and local levels to move from a nation that is primarily reactive to coastal disasters to one that invests wisely in coastal risk reduction and builds resilience among coastal communities.
Author: Stanley J. Czerwinski
Publisher: DIANE Publishing
ISBN: 9781422329481
Category :
Languages : en
Pages : 22
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The devastation caused by the Gulf Coast hurricanes presents the nation with unprecedented challenges as well as opportunities to reexamine shared responsibility among all levels of gov¿t. All levels of gov¿t., together with the private & nonprofit sectors, will need to play a critical role in the process of choosing what, where, & how to rebuild. Agreeing on what the costs are, what federal funds have been provided, & who will bear the costs will be key to the overall rebuilding effort. This testimony: (1) places federal assistance provided to date in the context of damage estimates for the Gulf Coast; & (2) discusses key federal programs that provide rebuilding assistance to the Gulf Coast states. Illustrations.
Author: Craig F. Harter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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In many places along the U.S. East and Gulf Coast, barrier islands are the first line of defense against extreme weather events threatening our coastlines. Follett's Island is a sediment-starved barrier island located on the Upper Texas Coast; a stretch of coastline that experiences on average four hurricanes and four tropical cyclones per decade. As the topic of this thesis the impact of Hurricane Ike on Follett's Island (FI), TX is studied. The goal of this study is to address how Hurricane Ike affected the sediment supply on the subaerial beach and foredune of FI, how the island recovered following the hurricane, and what physical processes governed the response of the island during the hurricane. This study first outlines the collection of available hydrographic, atmospheric, aerial and survey data and provides an analysis of these data to characterize the long term metocean and geomorphological state of the island. It was found that water levels at FI during Hurricane Ike exceeded the 100 year water levels, and wave heights matched roughly the 40 year exceedance levels. From LiDAR surveys, it is clear that despite an initial sediment volume loss after the hurricane, the foredune and subaerial beach ultimately experienced a net gain in sediment volume (up to 25%), and an extension of the shoreline (up to 25 m) after a five year recovery period. Numerical modeling tools XBeach and CSHORE were employed in an attempt to numerically reproduce the observed effects of the hurricane on FI. The ultimate goal of the numerical modeling is to show a real time response of the island during the passing of the storm, rather than the before and after snapshots provided by LiDAR data. XBeach displayed a decent model skill of 0.34 and was very useful in qualitatively visualizing erosion and deposition patterns. CSHORE also displayed a decent model skill of 0.33 and was able to accurately predict the post-storm beach slope and shoreline, but was less effective at simulating the foredune morphology. Based on these data, the subaerial beach and foredune ultimately experienced a net gain in sediment volume after recovering from Hurricane Ike. This is a phenomenon that is contrary to the findings of other studies, and thus it is clear that sediment-starved barrier islands like FI need fundamentally different coastal protection considerations than other coastal systems. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155506
Author: United States. Department of the Interior
Publisher:
ISBN:
Category : Barrier islands
Languages : en
Pages : 56
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 208
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Author:
Publisher:
ISBN:
Category : Barrier islands
Languages : en
Pages : 304
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Author: United States. Department of the Interior. Coastal Barriers Task Force
Publisher:
ISBN:
Category : Barrier islands
Languages : en
Pages : 488
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