摘要
为了研究河床介质渗透系数非均质性对潜流交换的影响,应用随机一阶分析工具,分析潜流交换通量与河床不同空间位置渗透系数的互相关关系以及渗流流速方差的空间分布。结果表明:潜流交换通量与渗透系数之间成正相关关系,且正相关关系最强的区域位于沙丘表面附近;忽略河床非均质性将导致河床浅层位置的流速具有较大不确定性,野外应重点监测河床浅层位置的渗透系数以减小潜流交换的不确定性。
In order to study the influence of heterogeneous field with permeability coefficient to the subsurface flow exchange,this study adopted a stochastic first-order analysis method to explore the cross-correlation between hyporheic exchange flux and permeability coefficient,as well as the spatial distribution of velocity variance.The results show that hyporheic exchange flux is positively correlated with permeability coefficient heterogeneity in every part of the streambeds with the high cross-correlation zone near the dunes surface.Ignoring the heterogeneity of the riverbed will lead to greater uncertainty of the flow velocity at the shallow position of the riverbed,in the field,the permeability coeffi-cient of the shallow position of the riverbed should be monitored to reduce the uncertainty of the subsurface flow exchange.
作者
王旭东
苏小茹
韩鹏飞
刘升阳
张锁
朱晓倩
邢朕国
王路军
WANG Xudong;SU Xiaoru;HAN Pengfei;LIU Shengyang;ZHANG Suo;ZHU Xiaoqian;XING Zhenguo;WANG Lujun(Shenhua Group Xinjie Energy Co.,Ltd.,Erdos 017200,China;State Key Laboratory of Water Resources Protection and Utilization in Coal Mining,Beijing 102211,China;National Institute of Low Carbon and Clean Energy,Beijing 102211,China;Key Laboratory of Groundwater Conservation of Ministry of Water Resources,China University of Geosciences(Beijing),Beijing 100083,China;Ministry of Education Key Laboratory of Groundwater Circulation and Environmental Evolution,China University of Geosciences(Beijing),Beijing 100083,China;School of Water Resources&Environment,China University of Geosciences(Beijing),Beijing 100083,China;Bureau of Natural Resources of Anzhou District,Mianyang 622650,China;Chinese Research Academy of Environmental Sciences,Beijing 100012,China)
出处
《人民黄河》
CAS
北大核心
2024年第1期79-84,共6页
Yellow River
基金
国家自然科学基金资助项目(42202269,42302280)
国家能源集团科技项目(GJNY-21-129)。
关键词
潜流交换
渗透系数
随机一阶法
流速方差
subsurface flow exchange
permeability coefficient
stochastic first-order method
velocity variance
