Investigation and Analysis on Dynamics of atmospheric stable layer and air pollution formed by Kathmandu valley

通过数值模拟，得到了影响加德满都河谷水流和扩散场的无量纲参数。在加德满都谷地进行了无量纲参数水槽试验。实验结果与数值模拟基本一致。在特里布万大学的屋顶上进行了NOx浓度、TSP浓度和氧化剂浓度的连续测量。还测量了加德满都谷地10个地点的VOC化合物。根据这些分析结果推测VOC排放量。NOx排放量和TSP排放量是考虑到交通量的增加而从参考数据中推测的。利用这些排放数据，采用一箱两层模式计算了大气污染物浓度，与实测浓度吻合较好。

The dimensionless parameters dominant in the flow and diffusion field in the Kathmandu Valley were derived from the numerical simulation. The water tank experiment in the Kathmandu valley using the dimensionless parameters was conducted. The experimental results generally agreed with the numerical simulations. The continuation measurements of NOx concentration, TSP concentration, and oxidant concentration were carried out at the roof in Tribhuwan University. VOC compounds at 10 places in the Kathnamdu valley were also measured. The amount of VOC emissions was presumed from these analysis results. The amounts of NOx emissions and of TSP emissions were presumed from reference data in consideration of the increase of traffic volume. Using these emission data, atmospheric pollutant concentrations were calculated by one box model with two layers, and agreed with the measurement concentrations.