城市环境熵模型的建立及其在城市化环境影响评价研究中的应用

城市化是20世纪以来的一个全球性进程,与此同时,城市化对环境的影响也日益明显,并逐渐成为社会各界关注的焦点之一。文章在简单介绍热力学原理的基础理论、城市化概念特别是城市化对环境影响的基础上,从系统的角度深入分析了城市化对环境的影响与热力学熵原理的相似性。由此提出在城市化环境影响评价研究中借鉴热力学方法,提出了城市化环境影响评价的新概念和新方法——"城市环境熵"模型。最后,以珠江三角洲经济区城市化河水质量影响评价为例,运用"城市环境熵"模型进行了具体计算,结果表明,用此模型的评价结果与用均值化综合污染指数法的评价结果基本一致,相对误差为6.67%。可以认为用城市环境熵模型法来评价城市化对城市环境的影响是可行的。

Establishment of Urban Environmental Entropy model and its application in assessment of urbanization environmental impact

Urbanization has become a global process since the 20th century. Meanwhile, its impact on environment is more and more obvious. As a result, urbanization becomes one of the focuses to all the society gradually. On the basis of the thermodynamic theory, the urbanization concept, and the environmental impact of urbanization, the comparability between the environmental impact of urbanization and the thermodynamic entropy was systematically analyzed. Consequently, the concept "Urban Environment Entropy" was brought forward. A new method for the assessment of urbanization environmental impact, "Urban Environment Entropy" model, was established in this study. As a case study, the assessment of river water quality in the Pearl River Delta Economic Zone was introduced to show the application of the model. The results indicate that the assessing results of this model are basically consistent to those of the equalized synthetic pollution index method. The relatively error is 6.67%. Therefore, it can be thought that the Urban Environment Entropy model has very high reliability, and can be used widely in practical research.