盘锦市降水和旱涝的特征分析  

Analysis on Characteristics of Precipitation,Drought and Flood in Panjin City

作　　者：韩冬 HAN Dong(Panjin Urban Water Conservancy Service Center of Dawa District, Panjin 124200, China)

机构地区：[1]盘锦市大洼区水利服务中心,辽宁盘锦124200

出　　处：《黑龙江水利科技》2021年第2期7-9,90,共4页Heilongjiang Hydraulic Science and Technology

摘　　要：文章以盘锦市1969-2016年降水资料为基础,对其降水丰枯变化趋势及时空分布特征利用频率统计法加以分析,在此基础上揭示了盘锦市年降水量变化规律。结果表明:盘锦市年均降水量呈现出缓慢下降的变化特征,其变差系数为0.30,平均降水量567.7mm/a;年内降水量分配极不均衡,年总降水的30%-70%集中于汛期(6-9月),每年的7、8月份多出现最大1日降水,且年际降水量变化较大;盘锦市北部地区年均降水量低于南部地区,在空间分布上年均降水量呈自北向南逐步增大的趋势。Based on the precipitation data from 1969 to 2016 in Panjin City,this paper analyzes the variation trend and spatio-temporal distribution characteristics of precipitation abundance by using frequency statistical method,and reveals the variation rule of annual precipitation in Panjin City on this basis.The results show that:the average annual precipitation in Panjin City showed a slow decline,with a coefficient of variation of 0.30 and an average annual precipitation of 567.7mm,the annual precipitation distribution is extremely uneven,with 30%-70%of the annual total precipitation concentrated in the flood season(June to September),and the maximum one-day precipitation occurs in July and August of each year,and the inter-annual precipitation varies greatly;the average annual precipitation in the northern part of Panjin City is lower than that in the southern part of Panjin City,and the spatial distribution of the average annual precipitation is gradually increasing from north to south.

关 键 词：频率统计 降水分布 旱涝特征 盘锦市 

分 类 号：P426.616[天文地球—大气科学及气象学]