大沽河流域近60年降水量时空变化特征分析  

Analysis of temporal and spatial variation characteristics of precipitation in Dagu river basin for recent 60 years

作　　者：盛茂刚 黄修东 左林远 陈沭 

机构地区：[1]青岛市水文局,山东青岛266071

出　　处：《水资源与水工程学报》2016年第2期65-68,共4页Journal of Water Resources and Water Engineering

基　　金：青岛市应用基础研究计划项目(14-2-4-24-jch);水利部公益性行业科研专项项目(201301089)

摘　　要：以大沽河流域内及周边的28个雨量站1952-2011共60年的逐日降水资料,采用常规统计、变差系数、Arc GIS软件的IDM空间差值方法,分析了大沽河流域降水量的时间和空间分布特征。流域降雨时间分布特征主要表现为:汛期多年平均降雨量占全年的73.7%,而7、8两个月份降水占全年的51.8%;年降水量连丰、连枯年多以连续2年出现,降水量总体变化的倾向率为-21.0 mm/10a,下降趋势明显。年最大1 d降水量总体变化的倾向率为0.34 mm/10a,有上升趋势。空间分布特征主要表现为:大沽河流域的年降水量、雨量站≥50 mm暴雨日数分布均与流域内的地势有着密切的关系,高值区主要分布在丘陵、山区;低值区主要分布在流域内的平原区。Based on the daily rainfall data from 1952 to 2011 of 28 rainfall stations in Dagu river basin , the paper analyzed the rainfall temporal and spatial distribution characteristics by conventional statistical, coefficient of variation and IDM spatial interpolation method respectively. The results showed that the precipitation mainly distributes in July and August. The precipitation of the two months accounts for more than half of the annual precipitation. The inclination rate of annual precipitation and the maximal 1 - day precipitation is - 21.0mm per 10 years and 0.34ram per 10 years respectively. The precipitation in the basin shows upward trend. The spatial distribution characteristics of annual precipitation indicated that the maximal 1 -day precipitation and the storm rainfall days （≥50mm） have close relationship with the terrain in the basin. The high values of annual precipitation, the maximal 1 - day precipitation and the storm rainfall days （≥50mm） mainly distribute in hilly and mountain area and the low values distribute in plain area generally.

关 键 词：降水特征 空间差值 变差系数 大沽河流域 

分 类 号：P332.1[天文地球—水文科学]