Qualitative monitoring of the water content evolution in an inhomogeneous soil column
Qualitative monitoring of the water content evolution in an inhomogeneous soil column
复制标题
非均质土柱中含水量演变的定性监测
DOI：
10.1109/icgpr.2010.5550064
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
S. Ruy
中科院分区：
文献类型：
--
作者：
X. Y. Zhang;H. Tortel;A. Litman;S. Ruy
考虑微波成像问题，其中土柱被金属圆形外壳包围。目前正在开发该系统，以展示非侵入式微波成像系统用于体积含水量监测的潜力。最终目标是检索土壤湿度信息，因为它是了解土壤中流体流动以及植物根系吸水的重要参数。在这里，我们借助快速且相当稳健的采样方法来解决问题的定性部分：线性采样方法（LSM）和 MUSIC 方法。这些方法针对以下配置进行测试：一个水源在异质背景中扩散。我们表明，在一定程度上，可以使用 LSM 定性监测土壤含水量的变化。此外，我们提出了一种快速检测土柱内水源位置的方法。
A microwave imaging problem is considered where a soil column is surrounded by a metallic circular enclosure. This system is presently being developed to demonstrate the potentiality of non-invasive microwave imaging systems for volumetric water content monitoring. The final goal is to retrieve soil moisture information as it is an important parameter for understanding fluid flows in the soil as well as the water uptake by plant roots. Here, we address the qualitative part of the problem with the help of a rapid and rather robust sampling methods: the Linear Sampling Method (LSM) and the MUSIC method. These methods are tested for the following configuration: one water source diffuses in a heterogeneous background. We show that, to a certain extent, the evolution of the soil water content can be qualitatively monitored with the LSM. Moreover, we propose a quick way for detecting the position of the water source inside the soil column.