摘要
为探究黄河流域水资源演变特征,运用信息熵、CEEMDAN、Copula理论对黄河流域1960-2017年的降水时空演变规律进行了相关研究。结果表明:(1)过去50年间,黄河流域降水整体呈现出一种下降趋势,但源区降水在缓慢增加;(2)2002年以后,黄河流域降水时空信息熵减小,降水复杂性减弱;(3)CEEMDAN分解结果表明对黄河流域降水的观测和研究应主要集中在2~4年的短周期上,RES余量则反映了降水序列整体下降但近几年逐渐恢复的趋势;(4)通过Gumbel-Copula函数发现不同阶段黄河流域年、汛期降水联合分布以丰枯同频为主,且突变后同步概率增加。本研究从时间和空间维度对黄河流域不同阶段降水规律进行了研究,有助于进一步认识和把握黄河流域水循环特征,进而为黄河流域生态保护和高质量发展提供支撑。
To explore the characteristics of the evolution of water resources in the Yellow River Basin,information entropy,CEEMDAN,and Copula theories are used to study the temporal and spatial evolution of precipitation in the Yellow River Basin from 1960 to 2017. It is found that,(1) In the past 50 years,the precipitation in the Yellow River Basin as a whole has shown a downward trend,but the precipitation in the source area is increasing slowly;(2)After 2002,the Spatiotemporal information entropy of precipitation in the Yellow River Basin declined and complexity decreased.(3)CEEMDAN decomposition results show that the observation and research on precipitation in the Yellow River Basin should be mainly focused on the short cycle of 2~4 years,RES balance reflects the overall decline of precipitation sequence but gradually recovered in recent years;(4)Through the Gumbel-Copula function,it is found that the combined distribution of annual and flood season precipitation in the Yellow River Basin at different stages is mainly abundant and dry,and the probability of synchronization increases after the mutation. This paper studies the spatiotemporal characteristics of precipitation in the Yellow River Basin at different stages,which helps to further understand and grasp the characteristics of the water circulation in the Yellow River Basin,and then provide support for the ecological protection and high-quality development of the Yellow River Basin.
作者
张金萍
张航
ZHANG Jin-ping;ZHANG Hang(School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,China;Yellow River Institute for Ecological Protection and Regional Coordinated Development,Zhengzhou University,Zhengzhou 450001,China;Zhengzhou Key Laboratory of Water Resource and Environment,Zhengzhou 450001,China)
出处
《中国农村水利水电》
北大核心
2022年第3期60-68,共9页
China Rural Water and Hydropower
基金
国家重点研发计划项目(2018YFC0406501)
2018年度河南省高校科技创新人才支持计划项目(18HASTIT014)
河南省高等学校青年骨干教师培养计划项目(2017GGJS006)。
关键词
黄河流域
降水
信息熵
多时间尺度
COPULA
Yellow River Basin
precipitation
information entropy
multi-time scale
Copula
