基于信息熵的城市土地利用结构合理性分析

Rationality Analysis of Urban Land Use Structure Based on Shannon Entropy

城市土地利用是一个复杂系统,系统的稳定与否直接关系到城市各项活动的正常进行。从信息论的信息熵原理可知,信息熵的大小可以反映出土地利用系统的有序程度及土地利用方式的不同。通过信息熵、均衡度、优势度的计算,分析城市土地利用结构的合理性,为城市土地利用结构调整、土地利用规划提供科学依据。通过武汉市的实证分析,发现1992-2003年来武汉市土地利用结构信息熵在不断降低,并逐渐趋于稳定。

As a complex system, the stability of urban land use structure is directly relevant to a city＇ s development. According to the rationale of Shannon entropy based on systematic theory and informational theory, the Shannon entropies and the ordinal degrees of urban land use structure are different from each other in different ways of land use.The differences of land use structure and the differences of land using can be reflected by the value of Shannon entropy.This paper analyzes the rationality of urban land use structure by means of Shannon entropy, equilibrium degree and dominant degree and analyzes the dynamic evolvement of urban land use structure in Wuhan City from 1992 to 2003 ,with the result that Shannon entropy of land use structure has been decreasing.