基于GIS和信息熵的松嫩平原土地利用结构演化分析——兼论系统无序度、复杂性与多样性

Evolution analysis of land use structure of Songnen plain based on GIS and information entropy --In terms with disorder degree, complexity and diversity

熵可以描述系统的存在状态,而且熵的变化还可以表征系统的演化方向应用GIS技术,从地理场信息熵的角度入手,分析了松嫩平原土地利用结构的演变规律和形成原因。同时,将土地利用结构信息熵与土地覆被景观多样性结合起来,对以往研究结论进行更正,从新的角度解释了信息熵变化与生态系统变化趋势的关系,认为土地利用结构信息熵作为无序程度的提法是不确切的,应理解为复杂性和多样性的量度表3,参22。

Entropy can describe the existing status of a system, its variation can also be considered as the token of system evolution. Using GIS technology, this paper analyzed the evolution laws and development causes of land use structure in Songnen plain, on the basis of geographic field information entropy. At the same time, the paper combined information entropy of land use structure and landscape diversity of land cover,revised some former research results of .scholars, and re-explalned relationship between change in information entropy and variation trend of ecosystem. We figured out that it is not reasonable to take information entropy of land use structure as disorder degree, it should be considered as the measurement of complexity and diversity.