摘要
通过渭河源区渭源水文站1981~2010年30年的月年实测径流资料,分析了渭河源区径流年内分配的变化特征。结果表明:渭河源区径流年内分配逐渐趋于均匀,集中期的长期变化呈滞后趋势;年径流量30年呈减小趋势,趋势线具有513.0万m^3/10a的负倾向率;年径流量在1993年发生突变,之后呈显著减少;累积滤波器法和斯波曼秩次相关检验法对比分析,所得结果一致,呈显著减少趋势;得出渭源站发生洪水的风险减小,发生干旱的风险持续稳定。
Through the runoff data of Wei River source area measured from 1981 to 2010 years,30 years in total,analyzed from the distribution in homogeneity and concentration degree of annual runoff. The research results show that： the annual runoff of Wei River source area tended to be uniform gradually, and the long-term change of the concentration period showed a trend of lag; The annual runoff of the Wei River source area showed a trend of decrease, and the trend line has a negative trend rate of 5.13 million m3/10a; the mutations of annual runoff occurred in 1993, and there was a significantly decrease after 1993; a significant decrease trend showed by the cumulative filter method and Spomann rank correlation test; Through the extreme hydrologic analysis of Wei River source area station, it concluded that the risk of flooding occurring in Weiyuan hydrological station was decreasing, and the risk of drought occurring in the station was stable continuously.
出处
《水科学与工程技术》
2017年第2期41-43,共3页
Water Sciences and Engineering Technology
关键词
渭河源区
径流量
累积滤波器法
极端水情
Wei River source area
runoff
cumulative filter method
extreme hydrologic
