水土保持学报2011，Vol.25Issue(3)：49-53,5.
1952-2008年延河流域降水与径流的变化趋势分析
Trend Analysis of Precipitation and Streamflow during 1952-2008 in Yanhe River Basin
摘要
Abstract
Based on the measured streamflow data at Ganguyi hydrological station and the precipitation data of five meteorological stations in Yanhe river basin, annual, seasonal precipitation and streamflow were analyzed for the period of 1952-2008, and the Moving average method, Mann-Kendall test and Sen slope method were employed to detect the long-term change of precipitation and streamflow during the study period.The results showed that the precipitation and streamflow in flood season account for 72％ and 64％ of average annual precipitation and streamflow, respectively. The change of streamflow had the same trend as precipitation from 1950s to 1990s; precipitation increased first and then decreased later in the beginning of 21th century, however, the streamflow showed a decreasing trend at the same period. The annual precipitation had a weak decreasing trend during 1952-2008, but a significant increasing trend could be found in winter season at the rate of 0.18 mm/a. The streamflow of Ganguyi hydrological station decreased significantly in flood season at the rate of 99.25 × 104 m3/a. In four seasons, a declining trend for streamflow was identified in spring, but the change was not significant; the downward trends were significant in summer and autumn at the rate of 83.83 × 104 m3/a and 26.16 × 104 m3/a,respectively;while the significant increasing trend was detected in winter with the magnitude of 15.62 × 104 m3/a. Although correlation analyses reveal a close relationship between precipitation trends and streamflow trends, the contribution of human activity to the change of streamflow cannot be neglected.关键词
延河流域/降水/径流/Mann-Kendall趋势检验法/Sen斜率估计法Key words
Yanhe river basin/ precipitation/ streamflow/ Mann-Kendall test/ Sen slope method分类
农业科技引用本文复制引用
邱临静,郑粉莉,尹润生..1952-2008年延河流域降水与径流的变化趋势分析[J].水土保持学报,2011,25(3):49-53,5.基金项目
科技部"973计划"项目(2007CB407201) （2007CB407201）
农业部"948"项目(2010-S16) （2010-S16）
