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首页> 外文期刊>Aspects of Applied Biology >Off-target dust deposition for two granule application techniques: calculations oased on the IDEFICS spray drift model
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Off-target dust deposition for two granule application techniques: calculations oased on the IDEFICS spray drift model

机译：用于两种颗粒应用技术的脱靶粉尘沉积：基于IDEFICS喷雾漂移模型的计算

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摘要

Granular applications are generally considered to be free of emissions like drift. The presence of dust particles however increases the risk of downwind deposits onto surface waters. To investigate drift hazard for dust particles from granular applications, a simulation study was carried out using the IDEFICS spray drift model. Two granular application techniques were considered: a spinning disc technique and a boom spreader. Downwind deposits for various dust particle sizes were investigated. Weighted deposits onto the three water bodies (ditch, stream and pond) defined by the FOCUS Surface Water group were calculated. Weather conditions were chosen to be realistic worst case. The results indicated that for a boom spreader 3% of the applied dosageof granules may reach the surface of a ditch or stream, and 0.2% may reach the pond surface. For a spinning disc technique these figures are 1.5% and 0.2%, respectively. Downwind deposit rates were sensitive to changes in wind velocity, while rather insensitive to changes in atmospheric stability.
机译：通常认为粒状应用不含排放物，如漂移。然而，灰尘颗粒的存在增加了顺风沉积在地表水上的风险。为了研究颗粒应用中粉尘颗粒的漂移危险，使用IDEFICS喷雾漂移模型进行了模拟研究。考虑了两种颗粒应用技术：旋转盘技术和动臂吊具。研究了各种尘埃粒径的顺风沉积物。计算了FOCUS地表水组定义的三个水体（沟渠，溪流和池塘）上的加权沉积物。选择天气条件是最现实的最坏情况。结果表明，对于吊臂撒布机，施用剂量的3％的颗粒可以到达沟渠或溪流的表面，而0.2％的颗粒可以到达池塘的表面。对于转盘技术，这些数字分别为1.5％和0.2％。顺风沉积率对风速变化敏感，而对大气稳定性变化不敏感。

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