2D-ERT monitoring of soil moisture seasonal behaviour in a river levee: A case study
2D-ERT monitoring of soil moisture seasonal behaviour in a river levee: A case study
复制标题
DOI：
10.1016/j.jappgeo.2019.05.008
复制
发表时间：
2019-08-01
影响因子：
2
通讯作者：
Cote, Philippe
中科院分区：
文献类型：
--
作者：
Jodry, Clara;Lopes, Sergio Palma;Cote, Philippe
我们提出了一个研究的土壤水分的季节性行为在一个老堤堤坝通过二维直流电阻率层析成像监测的基础上嵌入式电极installation.We能够产生季节性的电阻率变化模型，补偿温度的影响，使用季节性的温度剖面模型。随时间推移的百分比电阻率变化的部分显示空间和时间的整体一致性与土壤温度的季节变化。离散可能是由于路面层，这是没有很好地考虑在反演过程中，以及延时反演陷阱。此外，季节性水分含量变化的详细估计无法给出一个准确的校准所采用的吸力probes是无法实现的。然而，堤坝似乎有空间一致的土壤水分的时间变化，明显受降雨量和地下水位和河流水位。未来的工作，开发三维采集和添加嵌入式水分含量探头应证明有效的监测设计，并给出了更详细的了解土壤水分季节性行为的研究延伸堤坝。(C)2019 Elsevier B.V.版权所有。
We present a study of the seasonal behaviour of soil moisture in an old embankment levee by means of 2D DC-electrical resistivity tomography monitoring based on an embedded electrode installation.We were able to produce seasonal resistivity change models that are compensated for temperature effects using a seasonal temperature profile model. Time-lapse sections of percentage resistivity changes show spatial and temporal overall consistency with seasonal variations of soil temperature. Discrepancies are likely due to the pavement layer that is not well considered in the inversion process as well as to time-lapse inversion pitfalls. Furthermore, a detailed estimation of seasonal moisture content variations could not be given as an accurate calibration of the employed suction probes was not achievable.Nevertheless, the levee appears to have spatially consistent time variations in soil moisture, clearly influenced by both rainfall and water table and river levels. Future work on developing 3D acquisitions and adding embedded moisture content probes should prove effective to our monitoring design and give a more detailed understanding of the soil moisture seasonal behaviour in the studied stretch of levee. (C) 2019 Elsevier B.V. All rights reserved.