| With the ever closer cross-strait relationship and the state’s great support for the economy in western coastal region, the area around Luoyuan Bay has currently become an important base for the development of Fuzhou industries. The investment in industrial construction such as iron and steel smelting, thermal power energy, petrochemical, and other leading industries will be increased gradually in the next few years. But these industries are the main sources of SO2, NO2, soot and dust emission, which have a significant impact on the regional atmospheric environment. Simulating the dispersal of pollutants effectively and studying the regional emission capacity can provide scientific basis for controlling the regional atmospheric environmental quality and arranging energy industry structure reasonably.This paper applies CALPUFF air quality dispersion model and combines MM5 mesoscale meteorological model to simulate the existing industrial pollutant emissions of the region around Luoyuan Bay, carry out simulation forecast for the key industry layout there, analyze the impact of the newly established industries on the regional atmospheric environment, and make relevant recommendations. The main research contents and conclusions are as follows:Firstly, couple the extracted applied terrain data, elevation data and mesoscale meteorological model based on CALMET meteorological module, implement simulation research on the regional meteorological flow field conditions, analyze and research regional meteorological wind farm conditions.Secondly, input the pollution sources of the simulation region into CALPUFF modules, simulate the distribution of existing pollutants, analyze the dilution and diffusion condition of pollutants, as well as the problems of the existing pollution source layout.Thirdly, simulate the emission of key industry layout in the region around Luoyuan Bay with the model. Simulate the annual average concentration distribution, the daily average maximum ground concentration and an hourly average maximum ground concentration of SO2、 NO2 and PM10 respectively. Analyze the impact of newly added emission sources on regional air environmental quality, and identify the areas which are sensitive and easy to exceed the standard as per the air quality standards. Put forward reasonable optimized schemes for the existing planned industrial structure of the researched area and allocate the pollution emission of each project within the region according to the standard control requirements, to provide technical support for the scientific use of regional atmospheric environmental carrying capacity for pollutants.Fourthly, the simulation results of the model show that:the area around Luoyuan Bay is surrounded by hills, perennial dominant wind NE blows into the bay from outside, average wind speed is low for many years, atmospheric dilution capacity is weak, while the distribution of industrial enterprises is relatively dense, several enterprises with large pollutant emission are concentrated in the low-lying area where in the north are mountains and hills which make the pollutants cannot spread but gather in space and time. It is proposed that the industries with great pollutant emission to be reduced when planning, and overall relocation for the area where it is easy to exceed the standard to be implemented as soon as possible.This paper carries out optimized adjustment for the existing industrial layout in Luoyuan Bay based on simulating the dispersion of pollutants. It not only provides scientific basis for making environmental decisions, but also guarantees that the industrial scale in Luoyuan Bay is fully brought to play under the premise that the atmospheric environment there is not damaged. |
PDF Full Text Request