Study On The Atmospheric Environmental Capacity Of Mianyang City

The study and the checking and ratifying of atmospheric environmental capacity are a basic for improving atmospheric environmental quality. Through the research of the environmental capacity, the target of the total air pollutant emission control can be established and the limited resources can be used rationally. Based on these aims, this paper analyzed thoroughly the atmospheric environmental capacity and the spot resource capacity in Mianyang city through the A-P value method on the bases of investigation, collecting and analysis of the data about the atmosphere. The PM₁0, SO₂ and NO₂ were selected as the influence factors. The main results were as follows:1) The discharge quantities of PM₁0, SO₂ and NO₂ were not exceed the admissible emission gross (namely, environmental capacity) in Mianyang city.2) The spare atmospheric environmental capacities of PM₁0, SO₂ and NO₂ in Mianyang city were 4233t/a, 5083t/a and 5706t/a, respectively. The ratios of the spare atmospheric environmental capacities and the atmospheric environmental total capacities of PM₁0, SO₂ and NO₂ were 0.268,0.494, and 0.462, respectively.The feasible countermeasures were put forward aim at the limited status of atmospheric environmental capacity in Mianyang city. The study can not only provide the scientific reference for the control of atmospheric pollution in Mianyang city, but provide the reference for other cities.