Estimating stable infiltration recharge rate by temperature tracer method

被引：0
|
作者：
Huo S. [1 ,3 ]
Jin M. [2 ,3 ]
Zhu C. [4 ]
Cheng X. [1 ]
机构：
[1] College of Resources and Environment, Yangtze University, Wuhan
[2] Laboratory of Basin Hydrology and Wetland Eco-restoration, China University of Geosciences, Wuhan
[3] School of Environment Studies, China University of Geosciences, Wuhan
[4] Geological survey of Jiangsu Province, Nanjing
来源：
Shuili Xuebao/Journal of Hydraulic Engineering | 2019年 / 50卷 / 06期
关键词：
Infiltration; Lysimeter; Soil temperature; Tracer; Unsaturated zone;
D O I：
10.13243/j.cnki.slxb.20190280
中图分类号：
学科分类号：
摘要：
To discuss the feasibility of temperature tracer method to evaluate the infiltration recharge rate, a lysimeter test was conducted under different water table conditions. The variation of temperature field of unsaturated zone was analyzed; and then the infiltration recharge rate was estimated by using the analytical solution for one dimensional steady heat transfer through a multi-layer unsaturated zone. The results indicate that air temperature is the primary control factor of unsaturated zone temperature field, but its influence would be weakened with increasing depth. Water table depth controls the specific heat of unsaturated zone by affecting the soil moisture content; shallow water table would reduce the fluctuation of temperature field. The irrigation event affects the temperature field by controlling the thermal conductivity of the unsaturated zone;the influence of the heat state of irrigation event could be neglected when the irrigation amount is small or the temperature difference between the irrigation water and soil water is inapparent. When the water table is shallow, the calculated infiltration recharge rate is more closed to the measured data compared with the results in the deep unsaturated zone; and it is more accurate to estimate the infiltration recharge rate in the dry season than the wet season by using the soil temperature data. The temporal variation of shallow soil moisture content mainly causes the evaluation error;and it limits the application of temperature, as a tracer, to evaluate the water flow in the unsaturated zone. © 2019, China Water Power Press. All right reserved.
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页码：761 / 772
页数：11
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