一种影响公路交通的冰冻强度计算方法
A Method of Calculating Freezing Intensity in Highway Traffic
中文摘要：
从冰冻雨雪对公路交通运行产生影响的角度，利用1958—2013年近55a的气象资料，提出了南、北方不同的冰冻过程判别条件。将每次冰冻过程的冰冻持续时间、降水持续时间、日平均降水量和日平均气温4个因子采用灰色关联度分析方法，探讨了一种影响公路交通的“冰冻强度”综合指标。经评估分析，该“冰冻强度”综合指标对低温雨雪冰冻过程具有较好的时间和空间可比性，可较好地表示冰冻天气的时间和空间分布特征，同时能较好地反映冰冻过程对公路交通运行的影响程度。
中文关键词：
公路交通，冰冻强度，冰冻过程，灰色关联度，综合指标
KeyWords：
highway traffic, freezing weather, freezing intensity, grey correlation degree, composite indicator
Abstract：
Based on daily data observed at conventional meteorological stations during the period from 1958 to 2013, wedeveloped different criteria for freezing processes selection in the North and South of china according to the impact of freezing rain and snow on the high way traffic operation. Then we set up a composite indicator called “freezing intensity” based on the grey correlation degree analysis, and taking the freezing duration, the rainfall duration, the average precipitation and the average daily temperature in each freezing process as the factors. The test results show that the composite indicator “freezing intensity”may describe the spatial-temporal variation of the freezing weather quit well. What’s more, it can reflect the extent of impact of freezing weather on the highway traffic operation.