基于信息熵的鹤山市土地利用结构时空变化研究

分析土地利用结构时空变化是研究区域土地利用优化配置的重要途径之一。基于信息熵理论,以经济发达地区—珠江三角洲西缘的鹤山市为例,对1999～2008年的土地利用结构信息熵变化以及2007年各镇信息熵差异进行研究。结果表明:(1)9年间,鹤山市地利用结构信息熵和均衡度呈现"增长—稳定—增长"的动态演变规律,总体呈增长趋势;(2)2007各镇土地利用结构信息熵具有明显的区域差异,可划分3种类型区:桃园镇、古劳镇、址山镇、雅瑶镇、沙坪镇5镇属于Ⅰ区(信息熵高值区);共和镇、龙口镇、鹤城镇、宅梧镇、双合镇5镇属于Ⅱ区(信息熵中值区);云乡镇属于Ⅲ区(信息熵低值区)。

Temporal-spatial Changes in Land Use Structure Based on Information Entropy in Heshan city

Analyzing temporal-spatial changes of land use structure was one of the important ways to study optimized allocation of the regional land use.Based on the information entropy theory,took Heshan city of western Pearl River Delta in the developed area in China as an case,this paper studied the dynamic changes from 1999 to 2008 as well as the spatial diversity of all towns in 2007 in the information entropy of land use structure in Heshan city.The results indicated that:(1) During 1999 and 2008 in Heshan city,the information entropy and equilibrium degree of land use structure showed a process of "increased-steady-increased" and a growing trend in general;(2) The diversity was quite large on the information entropy in towns in 2007,and could be divided into three classes:class one called high-value information entropy included five towns of Tiaoyuan,Gulao,Zhishan,Yayao and Shaping;class two called medium-value information entropy included five towns of Gonghe,Longkou,Hecheng,Zhaiwu and Shuanghe;class three called low-value information entropy included Yunxiang town only.