The formula for appearance distance of maximal concentration on the ground between two small distance chimneys was deducted from the formula of ground concentration of air pollutants.

• 通过大气污染物地面浓度计算公式,导出两根小间距烟囱大气污染物最大落地浓度出现距离的计算式,并给出二分法求解最大落地浓度及其出现距离的方法。