Abstract:

Using synoptic analysis and statistical methods,the paper analyzed the major climate characteristics of Wuhan city during the durative sleeting and freezing process with low temperature in 2008,in order to quantitatively evaluate the influences of meteorological factors on city urban transportation.Using the daily outage data of public traffic lines（including bus, ferry and steam ferry）of Wuhan city from Jan 12th to Feb 3rd,the paper defined the effect degree of public traffic during the durative sleeting and freezing process with low temperature.In term of statistical analysis,the key meteorological factors,key period and critical value of low temperature were found,and meteorological evaluation model was set up.The results show that during the durative sleeting and freezing process with low temperature,initial period was one of the key periods when the public traffic suffers from effect,and the relation between the effect degree and snow depth was closest.In three vehicles including bus,ferry and steam ferry,the relation between the effect degree of bus and meteorological factors was closest.The critical value of low temperature was 17℃,and it could cause obvious effect on bus of Wuhan city.The impact is all right that abovementioned conclusions were put to use in the actual evaluation operation of meteorological disasters