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Impacts of Climate Variability and Change on Flood Frequency Analysis for Transportation Design.
| 题名： | Impacts of Climate Variability and Change on Flood Frequency Analysis for Transportation Design. |
| 作者： | Tidwell, A. |
| 关键词： | Bridges; Climate Change; Flooding; Floodplains; Floods; Hydrology; Precipitation; Rainfall; Roads; Streamflow; Transportation |
| 摘要： | Planning for construction of roads and bridges over rivers or floodplains includes a hydrologic analysis of rainfall amount and intensity for a defined period. Infrastructure design must be based on accurate rainfall estimates how much (intensity), how long (duration), and how often (frequency or probability). UAF and the National Oceanic and Atmospheric Administration are updating this important design tool with support from AUTC and ADOT&PF. Measuring precipitation in an environment like Alaskas is difficult. Challenges include poor gauge performance in windy environments, especially for solid precipitation (such as snow, sleet, and hail); and accessing and working in remote, sparsely populated, rough, and complex terrain. Another issue is the sparseness and distribution of the gauge stations. For example, the area north of the Brooks Range, known as the Arctic Slope of Alaska, is one of the least-understood climatic regions of the country. This region, with an area of over 230,000 square kilometers, has only a handful of long-term precipitation gauges, and many of the existing gauges are unattended. The quality of reported precipitation data varies due to gauge location, type, and whether or not a rain or snow gauge shield is present. |
| 报告类型： | 科技报告 |
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