沿海丘陵地区面雨量估算插值方法试验比较

本文以温州地区为代表，对各种插值方法进行试验得出华东沿海丘陵地区最优的面雨量估算插值方法。根据影响的天气系统，将温州地区的降水性质分为冷空气、倒槽、西南低涡、静止锋、台风、副高边缘对流等典型降水类型。通过对近10a历史天气图和温州地区90个雨量观测站日降水量资料分析，选定该地区的各类天气过程的典型代表过程，再以各个过程中最具代表性的日降水作为试验资料。以目前研究应用得最多的反距离法、克里格法、样条插值法对各日降水在不同站密度等级条件下分别插值。根据制定的评价标准分析各插值方法对面雨量估算的适用性，从而系统、客观地得出华东沿海丘陵地区面雨量估算的最优插值方法及其对测站密度的要求。

THE EXPERIMENTATION OF COMPARING THE METHODS OF INTERPOLATION FOR ESTIMATING AREA RAINFALL OF IN THE EASTERN COASTAL HILL REGIONS

Several interpolating methods were discussed on the basis of the preciptation data of Wenzhou .The best interpolating method of estimating area rainfall in the eastern coastal hill regions was concluded . According to the weather system the rain of Wenzhou are classified into cold air,inverse trough,southwest low vortex, Mei-Yu,typhoon,convection on edge of subtropical anticyclone.By analyzing the synoptic chart and preciptation records of 90 rain gauging staions,the characteristic rain procedures were chosed out,and the characteristic day preciptation of each procedure was chosed out too,which is the data of experiment.The chosed day preciptation was interpolated by the most popular methods, such as inverse distance,krige,and spline under different density level of rain gauging station.According to the evaluating criteria which were made previously,each interpolation method was analyzed.Therefore,the best interpolation method that suited to use in eastern coastal hill regions was chosed objectively, and its requirements of station density were figured out too.