摘要
结合1957~2012年东江博罗站的水沙资料,运用Mann-Kendall趋势检验和连续小波变换方法,定性分析了东江水沙通量的年内分布规律,引入RRI指数定量研究了流量年内分布的均匀性。结果表明,东江流域水沙通量的年内分布规律在近50年内不断变化,枯季平均径流量呈较明显的增大趋势,洪季平均含沙量呈显著的减小趋势。结果表明,大中型水库建设和取水用水等人类活动作用是影响水沙通量年内分布规律的主要因素,气候因素影响较小。
Based on the monthly flow and sediment fluxes of Boluo station from 1957 to 2012,Mann-Kendall trend analysis and continuous wavelet transform are applied to detect the variations of flow and sediment fluxes at the intra-annual scale in the Dongjiang River.Moreover,a river regime index（RRI）is used to study the intra-annual distribution quantitatively.The results show that the pattern of intra-annual flow and sediment has changed over the past five decades.The average runoff in the dry season tends to increase while the sediment in the wet season tends to decrease.The changing intra-annual distribution of runoff and sediment can be attributed as human activities,such as dam construction and water extraction instead of the climate factors.
出处
《水电能源科学》
北大核心
2016年第5期9-11,16,共4页
Water Resources and Power
基金
国家自然科学基金项目(NSFC-41376094)
中央高校基本科研业务费资助(2015B16114)
关键词
东江
水沙通量
年内分布
人类活动
RRI指数
Dongjiang River
flow and sediment fluxes
intra-annual distribution
human activities
river regime index
