【摘要】 以广东省112个雨量站1981—2010年共30 a的逐日降水资料为研究样本,采用降雨集中指数PCI及回归分析方法并结合ARCGIS软件,进一步认识了广东省月降雨量的时空变化规律。结果表明:汛期沿海月降雨量均大于内陆地区,非汛期年内各月的月平均降雨量最大值与平均值的差异性明显大于汛期;不同特征月的降雨量空间分布存在明显差异;年内汛期(6月)的降雨强度有所增大,非汛期(3月)的则有所减小;年内降雨的集中度有所增加,且广东沿海地区年内降雨较内陆地区更为集中,广东省各站点年内降雨的集中度基本上自沿海向内陆递减。更多还原

【Abstract】 In this paper,the daily precipitation data of 112 rainfall stations in Guangdong Province from 1981 to 2010 are taken as the research samples to recognize the temporal and spatial variation of monthly rainfall in Guangdong Province further based on the PCI and regression analysis method with ArcGIS software. The results indicated that the monthly rainfall in coastal areas is greater than that in inland areas,and the difference between the maximum and average monthly average rainfall of each month in non-flood season is obviously greater than that in flood season. The rainfall intensity increases in flood season and decreases in non-flood season. The concentration degree of rainfall in the year has increased,and the rainfall in the coastal areas of Guangdong Province is more concentrated than that in the inland areas. The annual rainfall concentration of each station in Guangdong Province basically decreases from coastal to inland.更多还原