Potential of geoelectrical methods to monitor root zone processes and structure: A review
Potential of geoelectrical methods to monitor root zone processes and structure: A review
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DOI：
10.1016/j.geoderma.2020.114232
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发表时间：
2020-04
期刊：
影响因子：
6.1
通讯作者：
M. Cimpoiasu;O. Kuras;T. Pridmore;S. Mooney
中科院分区：
文献类型：
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作者：
M. Cimpoiasu;O. Kuras;T. Pridmore;S. Mooney
了解控制土壤、植物和大气之间的质量和能量交换的过程对于了解根区系统起着至关重要的作用，但它也有利于可持续农业和岩土工程等实际应用。提高过程理解需要快速、微创且经济高效的方法来监测浅层地下。地电监测方法满足这些标准，因此引起了土壤科学家越来越多的兴趣。此类方法对土壤湿度的变化和根系物质的存在特别敏感，这两者都是土壤和根区系统过程和机制的重要驱动因素。本综述分析了地电方法在土壤科学中的最新应用，并重点介绍了它们在估计水力特性和描绘根系结构等重点领域的主要成就。我们在此背景下讨论地电监测的具体优势和局限性。后者中最突出的是反演模型解的非唯一性以及电参数和土壤特性之间的土壤传递函数的适当选择。还研究了地电监测和替代表征方法之间的关系。最后，我们提倡未来结合根系水文模型和地电测量模型的跨学科研究。这包括开发更合适的模拟根电模型，仔细分离对电响应的不同根区贡献者，以及将空间和时间地球物理测量整合到植物水文模型中，以改进根区发育和水力参数的预测。
Understanding the processes that control mass and energy exchanges between soil, plants and the atmosphere plays a critical role for understanding the root zone system, but it is also beneficial for practical applications such as sustainable agriculture and geotechnics. Improved process understanding demands fast, minimally invasive and cost-effective methods of monitoring the shallow subsurface. Geoelectrical monitoring methods fulfil these criteria and have therefore become of increasing interest to soil scientists. Such methods are particularly sensitive to variations in soil moisture and the presence of root material, both of which are essential drivers for processes and mechanisms in soil and root zone systems. This review analyses the recent use of geoelectrical methods in the soil sciences, and highlights their main achievements in focal areas such as estimating hydraulic properties and delineating root architecture. We discuss the specific advantages and limitations of geoelectrical monitoring in this context. Standing out amongst the latter are the non-uniqueness of inverse model solution and the appropriate choice of pedotransfer functions between electrical parameters and soil properties. The relationship between geoelectrical monitoring and alternative characterization methodologies is also examined. Finally, we advocate for future interdisciplinary research combining models of root hydrology and geoelectrical measurements. This includes the development of more appropriate analogue root electrical models, careful separation between different root zone contributors to the electrical response and integrating spatial and temporal geophysical measurements into plant hydrological models to improve the prediction of root zone development and hydraulic parameters.