Author: Scott L. DouglassPublisher:
ISBN:
Category :
Languages : en
Pages : 386
Book Description
Highways in the Coastal Environment
Author: United States Department of TransportationPublisher: CreateSpace
ISBN: 9781508608981
Category : Transportation
Languages : en
Pages : 250
Book Description
(Hydraulic Engineering Circular 25) This report provides guidance for the analysis, planning, design and operation of highways in the coastal environment. The focus is on roads near the coast that are always, or occasionally during storms, influenced by coastal tides and waves. A primary goal of this report is the integration of coastal engineering principles and practices in the planning and design of coastal highways. It is estimated that there are over 60,000 road miles in the United States that can be called “coastal highways.” Some of the physical coastal science concepts and modeling tools that have been developed by the coastal engineering community, and are applicable to highways, are briefly summarized. This includes engineering tools for waves, water levels, and sand movement. Applications to several of the highway and bridge planning and design issues that are unique to the coastal environment are also summarized. This includes coastal revetment design, planning and alternatives for highways that are threatened by coastal erosion, roads that overwash in storms, and coastal bridge issues including wave loads on bridge decks.
Author: Scott L. DouglassHighways in the Coastal Environment
Author: United States Department of TransportationPublisher: CreateSpace
ISBN: 9781508593973
Category : Transportation
Languages : en
Pages : 148
Book Description
The US transportation system is vulnerable to coastal extreme event storms today and this vulnerability will increase with climate change. This vulnerability will increase as sea levels rise. Many projections of future sea levels suggest accelerated rise rates resulting from global climate change. Higher sea levels will combine with future extreme events to increase the vulnerability of coastal highways, bridges, and other transportation infrastructure. Thus, damage from coastal hazards such as hurricanes, high waves, tsunamis, and extreme tides will increase in cost, frequency, and magnitude. It is estimated that over 60,000 roadway miles in the US are exposed to coastal storm surge. The degree to which that exposure, and resulting vulnerability, will increase as a result of climate change is currently unknown. The transportation authorization act, MAP-21 - the Moving Ahead for Progress in the 21st Century, lists “protection against extreme events” as an eligible project purpose for federal funding of construction, replacement, rehabilitation, or preservation of bridges. The FHWA guidance memo entitled “Eligibility of Activities to Adapt to Climate Change and Extreme Weather Events under the Federal-Aid and Federal Lands Highway Program” provides more specific information on the use of federal highway program funds in the planning, design and construction of highways to adapt to extreme events considering climate change. This memo stressed that “consideration of extreme events, their impacts on highways and transportation systems, and development of adaptation strategies should be grounded in the best available scientific approaches.” Adaptation activities need to be based on the current understanding of weather patterns affecting the location of a project or region, as well as projected changes in climate. Thus, there is a need for technical guidance in assessing the exposure and vulnerability of highway infrastructure in the coastal environment that will be impacted by extreme events including considerations of the effects of climate change. This publication is intended to be technical guidance grounded in the “best available scientific approaches” to vulnerability and risk assessment and climate change. The purpose of this manual is to provide technical guidance and methods for assessing the vulnerability of coastal transportation facilities to extreme events and climate change. The focus is on quantifying exposure to sea level rise, storm surge, and wave action. It is anticipated that there will be multiple uses for this information, including risk and vulnerability assessments, planning activities, and design procedure guidance.
Author: Highways in the Coastal Environment
Author: Scott L. DouglassPublisher:
ISBN:
Category :
Languages : en
Pages : 123
Book Description
This manual provides technical guidance and methods for assessing the vulnerability of coastal transportation facilities to extreme events and climate change. This is a standalone supplement, a "Volume 2," to the existing, primary FHWA Hydraulic Engineering Circular (HEC) manual: "Highways in the Coastal Environment," HEC-25 (2nd ed., FHWA 2008). The focus of this supplement is quantifying exposure to sea level rise, storm surge, and waves considering climate change. lt is anticipated that there will be multiple uses for this guidance including risk and vulnerability assessments, planning activities, and design procedure development. The critical coastal processes controlling the vulnerability of transportation assets to extreme events are identified by region along with some available methods for modeling them and the likely impacts of climate change. Global sea level rise, including projections of future sea levels, is emphasized because of its importance. Tools for developing vulnerability assessments for coastal transportation infrastructure are described within the framework of engineering risk. Storm damage mechanisms, often exacerbated by sea level rise and climate change, are described. Adaptation approaches for coastal transportation infrastructure are also described. Many of the adaptations required for climate change and sea level rise are the same adaptations required for improving infrastructure resilience to extreme events with today's sea levels. Specific approaches for assessing exposure of coastal infrastructure to extreme events and climate change are presented in three different "levels of effort" ranging from use of available data to original numerical modeling. The inclusion of trained coastal scientists and engineers in the analysis team is suggested at all levels of effort. Three case studies from the existing literature on coastal vulnerability assessments to extreme events and climate change are described. Our coastal transportation infrastructure is highly exposed to extreme events today and that exposure is likely to increase with sea level rise and climate change.
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Author: National Highway Institute (U.S.)
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