珠江三角洲城市群污染综合指数预报的模式方法

THE MODEL PREDCTIVE METHOD OF SYNTHESISED POLLUTANT INDEX ON PEARL RIVER DELTA CITIES

关键词:  烟团  分解与合并  污染综合指数预报

Key words:  Puff  Splitting and merging  Prediction of pollutant synthesised index

摘要:

应用全二阶矩表示的商斯烟团模式,重点引入烟团的合并与分解及各种清除过程,并利用广州热带模式(GZTM)所提供的华南地区细网格的三维数字化流场,来计算污染物浓度的长期变化。具体先模拟计算SO₂、NO_x、TSP的地面浓度日变化,通过求平均得到每种污染物的日均浓度,并和对应的污染物的日均浓度二级标准比较,得到每种污染物的污染指数P_i,最后求和得出污染综合指数P,从而对珠江三角洲地区的污染综合指数作出预报。

Abstract:

The long-term concentration is calculated using the general second-order moments Guassian puff model and the high-resolution wind fields from Guangzhou tropical model (GZTM).The Guassian puff model includes the processes of the puff's splitting-merging and scavenging. The ppollutant synthesised index of Pearl River Delta cities is predicted with the fellowingstepe. The first is to have the SO₂,NO_x,TSP's ground concentrations simulated and the drilyaveraging concentration of every kind of species gained. The second is for the pollutant index P_i ofevery kind of species to be calculated to compare with the second respective division of pollutionstandards. The last is to compute pollutant synthesised index P computed with adding each P_i.