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GPR imaging of traffic compaction effects on soil structures
Acta Geophysica ( IF 2.3 ) Pub Date : 2021-02-11 , DOI: 10.1007/s11600-020-00530-0
Akinniyi Akinsunmade

Spatial and depth variability of soil characteristics greatly influence its optimum utilization and management. Concealing nature of soil subsurface horizons has made the traditional soil investigations which rely on point information less reliable. In this study, an alternative use of ground penetrating radar (GPR)—a near-surface geophysical survey method—was tested to address the shortcomings. The focus of the study was on assessment of characteristics variability of soil layers at a test site and evaluation of effects of compaction caused by machinery traffics on soil. GPR methods utilize electromagnetic energy in the frequency range of 10 MHz and 3.0 GHz. Fourteen profiles GPR data were acquired at the test site-a farmland in Krakow, Poland. Compaction on parts of the soil was induced using tractor movements (simulating traffic effects) at different passes. Data were processed using basic filtering algorithms and attributes computations executed in Reflexw software. Attempt made in the study was on use of GPR geophysical technique for soil assessment. The method allows delineation of the soil horizons which depicts characteristic depth changes and spatial variability within the horizons. Moreover, traffic effects that caused compaction on parts of the soil horizons were discernable from the GPR profile sections. Thus, similar densification like hardpan that may develop in natural setting can be investigated using the method. The results have shown the suitability of the method for quick, noninvasive and continuous soil investigation that may also allow assessment of temporal soil changes via repeated measurement.



中文翻译:

交通压实对土壤结构的GPR成像

土壤特征的空间和深度变化极大地影响了土壤的最佳利用和管理。由于土壤地下层的隐蔽性,使得依赖点信息的传统土壤调查变得不那么可靠。在这项研究中,对地面穿透雷达(GPR)的一种替代用途(一种近地表地球物理勘测方法)进行了测试,以解决该缺陷。该研究的重点是评估测试地点土壤层的特征变异性,以及评估由于机械运输对土壤造成的压实效果。GPR方法利用10 MHz和3.0 GHz频率范围内的电磁能量。在测试站点(波兰克拉科夫的一块农田)中采集了14个剖面GPR数据。在不同的通行时间使用拖拉机的运动(模拟交通影响)在土壤的一部分上进行压实。使用基本过滤算法处理数据,并在Reflexw软件中执行属性计算。研究中尝试使用GPR地球物理技术进行土壤评估。该方法可以勾勒出土壤层位,描绘出层位内的特征深度变化和空间变异性。此外,从GPR剖面部分可以看出导致部分土壤层压实的交通效应。因此,可以使用该方法研究可能在自然环境中发展的类似硬化的类似致密化。结果表明该方法适用于快速,

更新日期:2021-02-11
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