干旱地区农业研究2012，Vol.30Issue(2)：242-246,5.
海河流域近50年降水量时空变化特征分析
Characteristics of temporal and spatial variation of precipitation in Haihe River Basin during recent 50 years
摘要
Abstract
According to the precipitation data of Haihe River Basin during 1960-2010, the Tyson polygon is applied in the study to distribute the precipitation in every station of the whole basin. The Kendall tilt is calculated with the M - K and the characteristics of spatial and temporal variation of precipitation in the area is analysed. The results show that the overall precipitation is decreasing in time. Although the precipitation is increasing in spring, there is still very little rain. The variation of precipitation in summer is slow and the frequency of drought is relatively small. The precipitation in autumn is gradually decreasing and the drought level is similar to that of spring. There are no significant changes of precipitation and the level of precipitation is extremely little in winter. Besides, the continuous rainless phenomenon occurs in the period from spring to summer, or from autumn to winter, or even consecutively for four seasons. In space, the annual precipitation of the whole basin is gradually decreasing from south to North. Significant changes have taken place in Wutai Mountains and Tianjin in spring. The precipitation in the basin is increasing in summer, especially in the southwest part of Bohai area. It is decreasing significantly in the midle and east part of the whole basin. The precipitation is. Increasing in winter and the downtrend is slow in the whole basin.关键词
海河流域/降水/时空变化/M-K法Key words
Haihe River Basin/ precipitation/ temporal and spatial variation/ M- K分类
农业科技引用本文复制引用
王利娜,朱厚华,鲁帆,何立新..海河流域近50年降水量时空变化特征分析[J].干旱地区农业研究,2012,30(2):242-246,5.基金项目
国家重点基础研究发展计划(973计划)(2010CB951102) （973计划）
中国水科院科研专项项目(资集1001) （资集1001）
国家自然科学基金项目(51109224) （51109224）
