基于信息熵与分形理论的土地利用景观格局变化研究——以陕北农牧交错带为例  

Land use landscape pattern changes based on information entropy and fractal theory——A case study of the farming-pastoral region of northern Shaanxi

作　　者：贾科利[1] 张俊华[2] 常庆瑞[3] 

机构地区：[1]宁夏大学资源环境学院,宁夏银川750021 [2]宁夏大学新技术应用研究开发中心,宁夏银川750021 [3]西北农林科技大学资源环境学院,陕西杨凌712100

出　　处：《干旱地区农业研究》2009年第5期235-239,250,共6页Agricultural Research in the Arid Areas

基　　金：国家自然科学基金项目(30571527)

摘　　要：信患熵和分形理论为研究地理学中复杂结构现泉的不稳定性和系统的有序性提供了一条新途径，在土地利用景观格局变化领域有着广阔的前景。以信息熵和分形理论为指导，在遥感和CIS技术支持下，对陕北农牧交错带土地利用景观格局演变的分形特征和信息熵进行了分析，结果表明：1986—2003年，陕北农牧交错带土地利用景观结构趋于简单化，景观类型在空间上的稳定性逐渐增大；土地利用景观结构信忠熵总体上呈逐渐上升趋势，即土地利用无序度逐渐上升，而有序度逐渐降低。The fraetal theory and information entropy have provided a new approach for study of some geographical phenomena, such as instability and eomplex structure and orderlies, and it has a broad prospect for application in land use landscape pattern study. Guided by the fraetal theory and information entropy and the techniques of remote sensing and technology support of GIS, the patch fraetal dimension and stability index and Shannon entropy of landscape were calculated in the farming-pastoral region of northern Shaanxi, and based on calculation, change in fraetal character and information entropy of the land use landscape structure in the region was analyzed. The results showed that： from 1986 to 2003, great changes of land use landscape took place in the region; the characters showed that woodland, construction land area increased intensively, but cultivated land, water body, unusable land and sandy land area decreased consistently. The fraetal dimension D of caeh landscape type has a decreasing tendency, on the contrary, its stability index tends to be increasing, which show that the structure of land use landscape tends to be simple and the stable on space. The information entropy＇ of landscape structure in the study area has been rising in general since 1986, indicating a decrease in orderliness of land use system.

关 键 词：土地利用 景观格局 信息熵 分形 陕北农牧交错带 

分 类 号：F301.24[经济管理—产业经济]