用三维平流扩散模式预测滇池地区氟化物污染

根据包含有PBL湍流统计量的三维物质连续方程,作者设计了一个同时考虑大气参数的时空(三维)变化、多个连续污染源、线性的化学转化和迁移以及复杂地形影响的三维平流扩散模式,并将滇池地区整个PBL内连续实测的湍流统计量、拉氏时间尺度、中尺度流场和混合层厚度直接输入模式,对山谷风、湖陆风和城市热岛(昆明市)中尺度局地环流控制下的氟化氢浓度的日变化作了预测。结果表明,在输入同一资料情况下,预测的结果与实测值大体上一致。

APPLICATION OF A THREE-DIMENSIONAL ADVECTION-DIFFUSION MODEL TO THE FORECAST OF FLUORIDE POLLUTION IN THE DIANCHI AREA

Based on the three-dimensional equation of mass continuity involving the turbulent statistics in the PBL, a three-dimensional advection-diffusion model, that simultaneously considering the time and space change of atmospheric parameters, multiple continuity pollutant source, linear chemical transformation and removal of pollutant, and effect of complex terrain, was developed. The continuously observed turbulent statistics, Lagrangian time scales, mesoscale flow field, and mixing layer depth in the PBL in Dianchi area were directly inputted into the model, and diurnal variation of HF concentration effected by such mesoscale local circulations as mountain and valley breeze, land and lake breeze, and city heat island (Kunming city) was forecasted. The results showed that they are in good agreement with experimental data, as well as the results of the Monte-Carlo type model, in case of inputting the same data.