我国现行大气环境影响评价预测模型的若干问题及其改进

我国现行大气环境影响预测评价模型存在以下几个问题:大气混合层高度求算偏低;稳定条件下大气扩散计算结果不合理;模型未考虑非扩散因素影响(干湿沉积、化学转化);非正常排放模型在小风、静风条件下计算结果偏大;熏烟模型计算的不可操作性等。本文针对这些问题提出相应的改进方法,并进行了实例计算。

Limitation And Improvement Of The Regular Atmosphere Predictive Model In Chinese Environmental Impact Assessment

Some defects of the regular atmosphere predictive models in Chinese environmental impact assessment were put forward in this paper,such as the too low mixed layer height calculated by regular model;unreasonable results in the stable stratification;without taking non-diffusion aspects into account including dry sediment,wet sediment and chemical translation;relatively too high results calculated the non-normal dispersion models under little and calm wind;unusefulness of the smudging models and so on.As far as these defects were concerned,some new methods had been advanced to modify these defects,moreover,some practical examples were calculated in this paper.