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Updates to the Design Practices Guide for Applying Climate Change Information to Hydrologic and Coastal Design of Transportation Infrastructure

项目名称：	Updates to the Design Practices Guide for Applying Climate Change Information to Hydrologic and Coastal Design of Transportation Infrastructure
摘要：	Transportation hydraulic engineers are being asked to account for global climate change within hydrologic and hydraulic (H&H) design practice. Current H&H design procedures stipulate use of historical data that are assumed to represent a stationary process. Climate change introduces non-stationary risks such as sea level and temperature rise, and changes in timing and distribution of precipitation, snowpack, and snowmelt. Failure to account for such non-stationary risks may compromise the operational characteristics of existing and future transportation infrastructure. Climate change scientists employ outputs from a cascade of models to develop regional scenarios representing these non-stationary phenomena that are not associated with specific probabilities. Existing guidance for H&H design does not provide methods to incorporate such information. Collaborative efforts and a common set of terms and definitions between climate change scientists, hydrologists, hydraulic engineers, and coastal engineers are essential to harmonize climate change inputs and H&H design practice. Incorporating the results of climate models may have large cost implications for future infrastructure. For example, overestimates of the magnitude of peak flows can result in costly oversizing of drainage infrastructure, while underestimates might leave infrastructure vulnerable and the resultant flooding impacts on surrounding lands and structures inadequately addressed. It is often questioned if the magnitude of change in hydrologic and hydraulic inputs due to climate change are within the range of uncertainties accounted for in the current state of practice and how the uncertainties vary for the design of various hydraulic features ranging from stormwater management facilities to bridges, given that they are typically evaluated for varying design events (e.g., intensity, duration, and frequency). Furthermore, accounting for climate change in hydraulic design is complicated by additional non-stationary processes arising from urbanization and other land cover changes. NCHRP Project 15-61, “Applying Climate Change Information to Hydrologic and Hydraulic Design of Transportation Infrastructure,” delivered a proposed AASHTO Design Practices Guide for Applying Climate Change Information to Hydrologic and Coastal Design of Transportation Infrastructure. Research is needed to prepare a revised version of the design guide addressing important topics subsequently identified by NCHRP. OBJECTIVE The objective of this research is to address important research topics that require further analysis and elaboration in the Design Practices Guide for Applying Climate Change Information to Hydrologic and Coastal Design of Transportation Infrastructure before the design guide is submitted to the Technical Committee on Hydrology and Hydraulics (TCHH) for review and consideration for AASHTO adoption.
状态：	Proposed
资金：	400000
资助组织：	National Cooperative Highway Research Program；American Association of State Highway and Transportation Officials (AASHTO)；Federal Highway Administration
项目负责人：	Barcena, Roberto
开始时间：	20220609
主题领域：	Design；Environment；Highways；Hydraulics and Hydrology；Planning and Forecasting