مرکز منطقه ای اطلاع رساني علوم و فناوري - تجزيه و تحليل دما و يخبندان در ارتباط با اقليم فرودگاهي

چكيده لاتين :

The daily expansion of airport industry sets up the necessity of appropriate airport construction plans, the site selection and designing of which, requires a comprehensive study of climatic element in relation to aviation. One of the decisive factors in climatic studies is the heat element which is regarded as the main aspect in all Climatic studies, as its influence is regarded to be the most important environmental parameter in such studies. On the other hand, the freezing phenomenon that is caused by the fall of heat .has more significance in aviation, because the occurrence of freezing conditions not only generates dangers and threats for the aircraft take offs and landings but also for its bulk and its ordering controls. In this research, we have paid attention to two factors of heat and freezing as the main influencing climatic factors in airport foundation because of the predictable construction project of a multipurpose airport for solving the increasing general demands in the area, in Mianeh in the East Azerbijan. The main concentration of this paper is on the parameters such as heat and the number of freezing days in Mianeh synoptic station based on 1987-97 records. Firstly, the heat has been analyzed and the results indicate that on the basis of the mean, the maximum and minimum temperatures , Mianeh experiences warm to very warm summers and cold to very cold winters in successive years and the range of temperature changes being 67.4 C seems to be very high. The matching of temperature return period using the normal distribution method proves that there is a possibility for the occurrence of a maximum temperature of 42.46 C in the next 40 years. Subsequently, analyzing the records with respect to the number of freezing days and the standard deviation for the 13 days with a 95% confidence level, postulates that the approximate date for the beginning of freezing days occurs in October, and in January reaches to its maximum of 2 8 days. The analysis was followed by applying the mean and maximum daily temperature for the calculation of the reference temperature of the airport. The correction were accomplished for the length of the flight take off zone of each zone in the airport site. The final section of the paper contains the policies and recommendations proposed.