基于温度时间序列分析的水库 下泄低温水入渗速度研究

朱蓓; 赵坚; 陈孝兵; 李英玉

doi:10.11988/ckyyb.20150180

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raybet体育在线院报 ›› 2016, Vol. 33 ›› Issue (6) : 12-17. DOI: 10.11988/ckyyb.20150180

水资源与环境

基于温度时间序列分析的水库下泄低温水入渗速度研究

朱蓓,赵坚,陈孝兵,李英玉

作者信息 +

Study on the Seepage Rate of Low Temperature Water Discharged from Reservoir Using Time Series Analysis

ZHU Bei, ZHAO Jian, CHEN Xiao-bing, LI Ying-yu

Author information +

文章历史 +

摘要

用温度作为示踪剂,基于饱和多孔介质一维稳态水热运移方程,运用时间序列分析法推求入渗速度,分析该方法的适用条件和范围,以及对热力参数选取的敏感性。以浙江省新安江下游河段为例,通过分析河岸带潜流区不同深度温度传感器的温度分布曲线相位和振幅变化,研究地表水和地下水的交换特征。结果表明流速较低时,入渗速度对不同深度的振幅变化较敏感,入渗速度接近±1×10^-5 m/s时,相位差的变化对入渗速度的影响最大。监测时段内试验区的入渗速度大致为2.22×10^-5~4.39×10^-5 m/s,入渗速度的数值均为正值,即在监测时段内均为地表水补给地下水。时间序列分析法对河床冲刷和沉积较不敏感,适用于较复杂的水流条件,且在一定程度上克服热弥散度的误差。

Abstract

Temperature was used as a tracer to capture the hypothetic flow. Based on the equation of onedimensional steadystate water and heat transport in saturated porous medium, seepage velocities were estimated using time series thermal data. The application conditions and ranges, and the sensitivity to thermal properties of this method were analyzed. The vertical temperature at different depths in the riparian zone of the lower reach of Xin’an River, in Zhejiang Province, were monitored, and the changes in phase and amplitude of the temperature type curve were analyzed to quantify surface watergroundwater interactions. Results show that seepage velocity was sensitive to amplitude variation at low flow rates, and the greatest sensitivity of seepage rate to phase shift occurred near ±1×10^-5m/s. In the monitoring period, the seepage velocity fluctuated from 2.22×10^-5m/s to 4.39×10^-5m/s, and the values of the seepage velocity were all positive, which means that groundwater was recharged by surface water. The time series method which is insensitive to streambed scour and sedimentation, allows for application under a wide range of complex hydrodynamics conditions, and overcomes the effect of thermal dispersivity to some extent.

导出引用

朱蓓,赵坚,陈孝兵,李英玉. 基于温度时间序列分析的水库下泄低温水入渗速度研究[J]. raybet体育在线院报. 2016, 33(6): 12-17 https://doi.org/10.11988/ckyyb.20150180

ZHU Bei, ZHAO Jian, CHEN Xiao-bing, LI Ying-yu. Study on the Seepage Rate of Low Temperature Water Discharged from Reservoir Using Time Series Analysis[J]. Journal of Changjiang River Scientific Research Institute. 2016, 33(6): 12-17 https://doi.org/10.11988/ckyyb.20150180

中图分类号： TV138

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