AERMOD模型地表参数标准化集成系统研究

Standard systems of surface parameters in AERMOD

针对大气环境影响评价工作中存在的一些问题和需求,构建了基于全国高分辨率土地利用数据、GIS地理信息系统、AERSURFACE地表参数处理模块的集成系统.该系统以研究区域土地利用类型为核心,着眼于通过标准化、自动化的方法提高AERMOD的模拟效果,最终建立一套全国地表参数综合数据库.结合内蒙古上都电厂的现场监测结果,对该系统修正后的地表参数进行模拟验证,结果表明,修正后模拟结果的FB值和RHCR值分别为0.37、1.41,相比于修正前的结果更加接近0和1,说明了经AERSURFACE修正后的地表参数更能反映真实的扩散情况.

As we have a lot of problem and requirements in Atmospheric EIA （Environment Impact Assessmen） work, we built an Integrated System based on the high resolution data, GIS technology and EPA surface parameters processing module. With the land use data, the system focused on improving AERMOD simulation result by the standardized and automatic ways, and finally build a national EIA surface parameters database. With a real case in Inner Mongolia, we compared the results before and after modification, the results show that FB and RHCR index are more close to 0and 1. So we can say that the AERSURFACE system can improve the accuracy of prediction.