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A review of geophysical methods for soil structure characterization
Reviews of Geophysics ( IF 25.2 ) Pub Date : 2018-12-01 , DOI: 10.1029/2018rg000611
Alejandro Romero-Ruiz 1 , Niklas Linde 1 , Thomas Keller 2, 3 , Dani Or 4
Affiliation  

The growing interest in the maintenance of favorable soil structure is largely motivated by its central role in plant growth, soil ecological functioning, and impacts on surface water and energy fluxes. Soil structure pertains to the spatial arrangement of voids and solid constituents, their aggregation, and mechanical state. As a fragile product of soil biological activity that includes invisible ingredients (mechanical and ecological states), soil structure is difficult to define rigorously, and measurements of relevant metrics often rely on core samples or on episodic point measurements. The presence of soil structure has not yet been explicitly incorporated in climate and Earth systems models, partially due to incomplete methodological means to characterize it at relevant scales and to parameterize it in spatially extensive models. We seek to review the potential of harnessing geophysical methods to fill the scale gap in characterization of soil structure directly (via impact of soil pores, transport, and mechanical properties on geophysical signals) or indirectly by measurement of surrogate variables (wetness and rates of drainage). We review basic aspects of soil structure and challenges of characterization across spatial and temporal scales and how geophysical methods could be used for the task. Additionally, we propose the use of geophysical models, inversion techniques, and combination of geophysical methods for extracting soil structure information at previously unexplored spatial and temporal scales.

中文翻译:

土壤结构表征的地球物理方法综述

人们对维持有利土壤结构的兴趣日益增长,这主要是由于其在植物生长、土壤生态功能以及对地表水和能量通量的影响中的核心作用。土壤结构与空隙和固体成分的空间排列、它们的聚集和机械状态有关。作为土壤生物活动的脆弱产物,包括无形成分(机械和生态状态),土壤结构难以严格定义,相关指标的测量往往依赖于核心样本或偶发点测量。土壤结构的存在尚未明确纳入气候和地球系统模型,部分原因是在相关尺度上对其进行表征并在空间扩展模型中对其进行参数化的方法论手段不完整。我们试图审查利用地球物理方法直接(通过土壤孔隙、运输和机械特性对地球物理信号的影响)或通过测量替代变量(湿度和排水速率)来填补土壤结构表征中的尺度空白的潜力。 )。我们回顾了土壤结构的基本方面和跨空间和时间尺度表征的挑战,以及如何将地球物理方法用于该任务。此外,我们建议使用地球物理模型、反演技术和地球物理方法的组合来提取以前未开发的空间和时间尺度的土壤结构信息。和地球物理信号的机械特性)或间接通过替代变量(湿度和排水速率)的测量。我们回顾了土壤结构的基本方面和跨空间和时间尺度表征的挑战,以及如何将地球物理方法用于该任务。此外,我们建议使用地球物理模型、反演技术和地球物理方法的组合来提取以前未开发的空间和时间尺度的土壤结构信息。和地球物理信号的机械特性)或间接通过替代变量(湿度和排水速率)的测量。我们回顾了土壤结构的基本方面和跨空间和时间尺度表征的挑战,以及如何将地球物理方法用于该任务。此外,我们建议使用地球物理模型、反演技术和地球物理方法的组合来提取以前未开发的空间和时间尺度的土壤结构信息。
更新日期:2018-12-01
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