A Novel Dielectric Tomography System for In-Situ Tracking Three-Dimensional Soil Water Dynamics.
A Novel Dielectric Tomography System for In-Situ Tracking Three-Dimensional Soil Water Dynamics.
复制标题
用于原位跟踪三维土壤水动力学的新型介电层析成像系统
DOI：
10.3390/s18092880
复制
发表时间：
2018-08-31
期刊：
影响因子：
--
通讯作者：
Chen H
中科院分区：
文献类型：
--
作者：
Yu S;Chen C;Xu Q;Cheng Q;Yan X;Yu Z;Ma Y;Chen H
在这项研究中，我们开发了一种新的介质层析成像系统，用于原位跟踪三维（3D）土壤水动力学。该系统设计用于控制单个介质管传感器，该传感器自动降低在原位安装的PVC管阵列中，以确定土壤剖面的含水量，从而消除了探针到探针的不确定性和人工成本。为了评估新系统，进行了两项测试(i)分析和纠正由于步进电机失步误差导致的探针位置误差，以及（ii）跟踪和可视化滴灌条件下具有异质容重和初始含水量的土壤槽中的三维土壤水分时间变化。结果表明，结合起始点对准的定位校正算法可以最大限度地降低探针在三维断层扫描过程中的定位误差。单滴管试验表明，在垂直和水平方向上，由于土壤性质的不均匀，土壤含水量在空间和时间上发生了变化。基于这些数据，对土壤水动力学的三维分布进行了可视化。所开发的层析成像系统有可能扩展到温室的局部尺度或农田的大尺度。未来的研究应探索在农作物灌溉或模拟和验证稳态或非稳态条件下土壤水流或水文过程的性能。
In this study, we developed a novel dielectric tomography system for in-situ tracking three-dimensional (3D) soil water dynamics. The system was designed to control a single dielectric tube sensor that automatically lowered in a PVC tube array installed in-situ to determine the water content of a soil profile, which eliminated probe-to-probe uncertainties and labor costs. Two tests for evaluating the novel system were conducted (i) to analyze and correct the positional error of the probe due to out-of-step errors of stepper motors, and (ii) to track and visualize 3D soil water temporal variations in a soil tank with heterogenetic bulk densities and initial water contents under drip irrigation. The results show that the positioning correcting algorithm combined with starting point alignment can minimize the positioning error of the probe during the 3D tomography. The single drip emitter test illustrated spatial and temporal variations of soil water content due to heterogeneous soil properties in vertical and horizontal directions around the access tube array. Based on these data, 3D distributions of soil water dynamics were visualized. The developed tomography system has potential application to be extended to the local scale in a greenhouse or the large scale in an agricultural field. Future research should explore the performance for agricultural crop irrigation or for modeling and validating soil water flow or hydrological process under either steady state or non-steady state condition.
登录
查看更多内容
影响因子：
6.4
作者：
DEAN, TJ;BELL, JP;BATY, AJB
通讯作者：
BATY, AJB
影响因子：
6.4
作者：
Weihermueller, L.;Huisman, J. A.;Vereecken, H.
通讯作者：
Vereecken, H.
影响因子：
6.4
作者：
Brunet, Pascal;Clement, Remi;Bouvier, Christophe
通讯作者：
Bouvier, Christophe
DOI：
10.2136/sssaj1995.03615995005900040001x
发表时间：
1995-07-01
影响因子：
2.9
作者：
EVETT, SR;STEINER, JL
通讯作者：
STEINER, JL
DOI：
10.1109/tge.1978.294573
发表时间：
1978-01-01
影响因子：
8.2
作者：
WOBSCHALL, D
通讯作者：
WOBSCHALL, D