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首页> 外文期刊>Journal of Environmental Engineering >Modeling vertical spread of airborne pollutants from sources near ground level - Comparison with field measurements
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Modeling vertical spread of airborne pollutants from sources near ground level - Comparison with field measurements

机译：模拟来自地面附近源的空气传播污染物的垂直扩散-与现场测量结果进行比较

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An extensive set of field data from Project Prairie Grass has been used to evaluate various methods of estimating the input parameters commonly used by analytical plume models for characterizing the vertical profiles for wind speed and eddy diffusivity. Estimation of the vertical eddy transfer coefficient using the Businger heat transfer parameters from similarity theory showed the closest agreement with experimental data measured in the near vicinity of the source (<1,000 m downwind). Using the optimal input parameter estimation techniques identified, the downwind and vertical concentration profiles predicted by four analytical models were quantitatively compared with the field data under a range of meteorological conditions. Near ground level in the downwind direction, under stable atmospheric conditions all four models generated similar predictions that agreed fairly well with the data. Under unstable conditions, significant differences in the predictions of the four models were seen, especially at greater distances downward.
机译：来自大草原草项目的大量现场数据已用于评估各种估算输入参数的方法，这些方法通常由分析羽状模型用于表征风速和涡流扩散的垂直剖面。根据相似理论中的Businger传热参数估算垂直涡传递系数，显示出与源附近（顺风<1,000 m）附近测得的实验数据最接近。使用确定的最佳输入参数估计技术，将由四个分析模型预测的顺风和垂直浓度剖面与一定气象条件下的现场数据进行定量比较。在稳定的大气条件下，在顺风方向接近地平面时，所有四个模型都产生了类似的预测，这些预测与数据非常吻合。在不稳定的条件下，可以看到这四个模型的预测存在显着差异，尤其是在向下较大距离处。

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