Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028078 |
Numerical and experimental validation of the applicability of active‐DTS experiments to estimate thermal conductivity and groundwater flux in porous media | |
N. Simon; O. Bour; N. Lavenant; G. Porel; B. Nauleau; B. Pouladi; L. Longuevergne; A. Crave | |
2020-12-08 | |
发表期刊 | Water Resources Research |
出版年 | 2020 |
英文摘要 | Groundwater flow depends on the heterogeneity of hydraulic properties whose field characterization is challenging. Recently developed active‐Distributed Temperature Sensing (DTS) experiments offer the possibility to directly measure groundwater fluxes resulting from heterogeneous flow fields. Here, based on fundamental principles and numerical simulations, two interpretation methods of active‐DTS experiments are proposed to estimate both the porous media thermal conductivities and the groundwater fluxes in sediments. These methods rely on the interpretation of the temperature increase measured along a single heated fiber optic (FO) cable and consider heat transfer processes occurring both through the FO cable itself and through the porous media. The first method relies on the Moving Instantaneous Line Source (MILS) model that reproduces the temperature increase and provides estimates of thermal conductivity and groundwater flux as well as an evaluation of the temperature rise due to the FO cable. The second method, based on the graphical identification of three characteristic times, provides complementary estimates of flux, fully independent of the effect of the FO cable. Sandbox experiments provide an experimental validation of the interpretation methods, demonstrate the excellent accuracy of groundwater flux estimates (< 5%) and highlight the complementarity of both methods. Active‐DTS experiments allow investigating groundwater fluxes over a large range spanning 1x10‐6 to 5x10‐2 m/s, depending on the duration of the experiment. Considering the applicability of active‐DTS experiments in different contexts, we propose a general experimental framework for the application of both interpretation methods in the field, making active‐DTS field experiments especially promising for many subsurface applications. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/308288 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | N. Simon,O. Bour,N. Lavenant,等. Numerical and experimental validation of the applicability of active‐DTS experiments to estimate thermal conductivity and groundwater flux in porous media[J]. Water Resources Research,2020. |
APA | N. Simon.,O. Bour.,N. Lavenant.,G. Porel.,B. Nauleau.,...&A. Crave.(2020).Numerical and experimental validation of the applicability of active‐DTS experiments to estimate thermal conductivity and groundwater flux in porous media.Water Resources Research. |
MLA | N. Simon,et al."Numerical and experimental validation of the applicability of active‐DTS experiments to estimate thermal conductivity and groundwater flux in porous media".Water Resources Research (2020). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论