熵变视角的吉林省城市化与生态环境的耦合关系判别

借鉴热力学第二定律中的熵变方程原理,结合熵值法和PSE模型,对2001—2011年吉林省城市化发展与生态环境效益的耦合关系模式展开分析.结果表明: 研究期间,吉林省城市化发展脱离了正常的演进轨道,经济城市化和空间城市化主宰了整个城市化过程,而过于忽视“人”的城市化,且资源(这里主要指土地资源)粗放、低效投入特征明显;基于PSE模型的生态环境水平,无论是压力指数、敏感性指数、弹性指数,还是综合水平在研究期间都得到了长足的增长,且都呈现出明显的阶段性特征,即先升后降再升;城市化系统的总熵值一直小于0,表现为一条不平稳的上升曲线;生态环境的总熵值时正时负,其中,2003、2006、2010、2011年是“拐点”,映射出生态环境系统是一条不平稳的波浪形曲线,时升时降;城市化子系统与生态环境子系统交互耦合的总熵值具有与生态环境子系统总熵值相似的变化趋势,即具有相同的“拐点”和曲线形状,且其“拐点”对应的演化模式是拮抗型耦合关系演化模式,其余年份对应的是协调型耦合关系演化模式.

Identification of coupling relationship between urbanization and ecological environment in Jilin from entropy change perspective.

By using the entropy change equation of the second law of thermodynamics, entropy method and PSE model, this article made an analysis on coupling relationship between urbanization and ecological environment in Jilin Province from 2001 to 2011. In the study period, the urbanization development had been out of normal evolution track: The economic urbanization and space urbanization dominated the whole urbanization process, while population urbanization was neglected too seriously, with an apparent characteristic of extensive and inefficient input of resources (especially land resource). According to the levels of ecological environment on the basis of PSE model, not only the pressure index, sensitivity index and the elasticity index, but also the comprehensive index showed considerable growth with obvious stage characteristics: ascending descending ascending. The total entropy values of the urbanization were less than zero during the time, which meant an unstable rising curve. While the total trophy values of the ecological environment varied below and above zero, and 2003, 2006, 2010 and 2011 were the “turning points”, reflecting the instabi lity of the ecological environment. The coupling total entropy values between urbanization and ecological environment had the same characteristics with the ecological environment: the same “turning points” and shape of the curve, in which, the “turning points” corresponded to the type of antagonistic evolution pattern, while the rest of years responded to the type of coordination evolution pattern.