期刊
HYDROLOGICAL PROCESSES
卷 30, 期 3, 页码 383-395出版社
WILEY
DOI: 10.1002/hyp.10568
关键词
temperature; temperature probes; thermal conductivity; Ringkobing Fjord; groundwater flux
资金
- Centre for Hydrology (HOBE) - Villum Foundation
- Center for Lake Restoration (CLEAR) - Villum Foundation
- Spanish Program for Postdoc Mobility
- Villum Fonden [00007163] Funding Source: researchfish
Analytical modelling of heat transport was used to address effects of uncertainty in thermal conductivity on groundwater-surface water exchange. In situ thermal conductivities and temperature profiles were measured in a coastal lagoon bed where groundwater is known to discharge. The field site could be divided into three sediment zones where significant spatial changes in thermal conductivity on metre to centimetre scale show that spatial variability connected to the sediment properties must be considered. The application of a literature-based bulk thermal conductivity of 1.84Wm(-1) degrees C-1, instead of field data that ranged from 0.62 to 2.19Wm(-1)degrees C-1, produced a mean overestimation of 2.33 cm d(-1) that, considering the low fluxes of the study area, represents an 89% increase and up to a factor of 3 in the most extreme cases. Incorporating the uncertainty due to sediment heterogeneities leads to an irregular trend of the flux distribution from the shore towards the lagoon. The natural variability of the thermal conductivity associated with changes in the sediment composition resulted in a mean variation of +/- 0.66 cm d(-1) in fluxes corresponding to a change of +/- 25.4%. The presence of organic matter in the sediments, a common situation in the near-shore areas of surface water bodies, is responsible for the decrease of thermal conductivity. The results show that the natural variability of sediment thermal conductivity is a parameter to be considered for low flux environments, and it contributes to a better understanding of groundwater-surface water interactions in natural environments. Copyright (C) 2015 John Wiley & Sons, Ltd.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据