Abstract Atrazine is an herbicide commonly used to control weeds in corn crop. Atrazine becomes an environmental concern when it moves off-site to surface and ground waters. Understanding how atrazine moves in the field is important for developing management controls. Electromagnetic induction (EMI) has been used to map certain contaminant transport at the field scale. This study was developed to evaluate the efficacy of EMI technology for identifying surface soil atrazine concentration in a corn crop field. The research was conducted in a corn silage field with silt, clay and loam soils at the U.S. Meat Animal Research Center (USMARC), Clay Center, NE – USA, and it was divided in three stages; i) EMI data collection and a response surface sampling design for collection of bulk soils and soil core samples, ii) atrazine transport parameters were obtained by Breakthrough Curves using the bulk soil and numerical adjustments using STANMOD (HYDRUS package), and iii) Modeling atrazine parameters through EMI signal data with posterior atrazine’s movement simulations through the soil using HYDRUS 2D. Atrazine’s retardation factor, partition coefficient, and transfer coefficient were strongly correlated with EMI signal exhibiting a strong correlation with apparent electrical conductivity (ECa). The low values for RMSE and RRMSE and the high values for Willmott and Pearson coefficients indicate EMI technology can be used to predict atrazine movement parameters. HYDRUS 2D quantitatively simulates the atrazine concentration leaching and how the temporal scale of this contamination would be. Combining EMI technology with HYDRUS 2D modeling provides researcher with additional information for developing better management practices for controlling atrazine movement to surface water; however, further studies are needed determine the effectiveness of this approach for other soil types.

中文翻译：

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使用电磁感应技术在现场规模识别阿特拉津浸出潜力

摘要 阿特拉津是一种常用的玉米作物杂草防治除草剂。当莠去津迁移到地表水和地下水时，它会成为一个环境问题。了解阿特拉津如何在现场移动对于开发管理控制非常重要。电磁感应 (EMI) 已被用于绘制现场尺度的某些污染物迁移图。本研究旨在评估 EMI 技术在确定玉米作物田地表土阿特拉津浓度方面的功效。该研究是在美国内布拉斯加州克莱中心的美国肉类动物研究中心 (USMARC) 的具有淤泥、粘土和壤土的玉米青贮田中进行的，它分为三个阶段；i) EMI 数据收集和响应面采样设计，用于收集大块土壤和土壤核心样品，ii) 使用大块土壤通过突破曲线获得阿特拉津传输参数，并使用 STANMOD（HYDRUS 包）进行数值调整，以及 iii) 通过 EMI 信号数据对阿特拉津参数进行建模，并使用 HYDRUS 2D 通过土壤后阿特拉津的运动模拟。阿特拉津的延迟因子、分配系数和传输系数与 EMI 信号密切相关，表现出与表观电导率 (ECa) 的强相关性。RMSE 和 RRMSE 的低值以及 Willmott 和 Pearson 系数的高值表明 EMI 技术可用于预测阿特拉津运动参数。HYDRUS 2D 定量模拟莠去津浓度浸出以及这种污染的时间尺度。将 EMI 技术与 HYDRUS 2D 建模相结合，为研究人员开发更好的管理实践提供了额外的信息，以控制阿特拉津向地表水的移动；然而，需要进一步的研究来确定这种方法对其他土壤类型的有效性。