CAJ | 학술논문

海岸地区热力内边界层(TIBL)对大气污染物扩散具有重要影响.选取杭州湾地区某区域为模拟区,采用一个TIBL高度的简单计算模式模拟模拟区的TIBL高度,将其耦合到空气质量模式AERMOD中,并对AERMOD的相关模块和参数进行了相应的修改,再分别利用原AERMOD和改进后的AERMOD,模拟了不同污染源情景下的大气污染物地面浓度分布.结果表明,在多数情况下,由于TIBL对于大气污染物扩散空间的限制,大气污染物的地面最大浓度有所升高,地面浓度的高值区范围也有所增加,具体影响特征取决于污染源与TIBL的相对高度以及污染源距离海岸的相对位置.
해안지구열력내변계층(TIBL)대대기오염물확산구유중요영향.선취항주만지구모구역위모의구,채용일개TIBL고도적간단계산모식모의모의구적TIBL고도,장기우합도공기질량모식AERMOD중,병대AERMOD적상관모괴화삼수진행료상응적수개,재분별이용원AERMOD화개진후적AERMOD,모의료불동오염원정경하적대기오염물지면농도분포.결과표명,재다수정황하,유우TIBL대우대기오염물확산공간적한제,대기오염물적지면최대농도유소승고,지면농도적고치구범위야유소증가,구체영향특정취결우오염원여TIBL적상대고도이급오염원거리해안적상대위치.
Thermal internal boundary layer(TIBL) in coastal area has an important influence on air pollutant diffusion. This research is done with observational data of the boundary layer in the northern coastal area of the Han-gzhou Bay. The author improved AERMOD model by established a simple one TIBL height computational model,coupled it into the widely-used air quality model AERMOD, and adjusted relevant modules and parameters of the model. The improved AERMOD model and old AERMOD model were employed to simulate the impact of the TIBL on air pollutant surface concentration under different situations. The results showed that for most cases, due to limi-tation of the TIBL to diffusion, the peak values and the range of high concentrations were obviously increased. The feature of the impact is determined by the relative height of the source and the TIBL, and the distance of the source to the sea shore.