山东省降水集中程度及其与旱涝的关系

Precipitation Concentration Degree and Its Relationship with Drought and Flood in Shandong Province

基于山东省1961~2012年25个雨量站的逐日降水资料,分析了山东省年降水量的时空分布特征,依据降水集中度PCD和集中期PCP的定义,计算分析了PCD、PCP的年际变化和空间分布特征,并分析了山东省年降水量与PCD和PCP的相关性,在此基础上,研究了降水集中度和集中期在山东省旱涝事件判别中的作用。结果表明,山东省东南地区降水量高于东北地区,山东省东南地区降水比西北地区均匀,位于东南部的临沂和日照集中期偏低,位于东北部的烟台和威海集中期偏高,其余地区适中,年降水量与PCD的相关性高于年降水量与PCP的相关性。

Based on the daily precipitation data of 25 rainfall stations in Shandong Province during 1961-2012 years,this paper analyzed the spatial and temporal distribution characteristics of annual precipitation in Shandong Province.According to the definition of precipitation concentration and concentration period,the interannual and spatial distribution characteristics of PCDand PCP were calculated,and the correlation between the annual precipitation and PCDand PCP was analyzed.On this basis,the effect of precipitation concentration degree and concentration period on drought and flood events in Shandong Province was studied.The results show that the precipitation in southeastern Shandong is higher than that in the northeast,the precipitation in southeastern Shandong is more uniform than that in the northwest;The concentration period of Linyi and Rizhao in the southeast is low,the concentration period of Yantai and Weihai in the northeast is high,and the other areas are moderate;The correlation between annual precipitation and PCDis higher than the correlation between annual precipitation and PCP.