云南省土壤侵蚀强度空间结构特征分析  

The Spatial Structure Analysis of Soil Erosion Intensity in Yunnan Province

作　　者：熊波[1,2,3] 陈学华[1] 蒋锦刚[1,4] 刘艳锋[1,2] 

机构地区：[1]中国科学院成都山地灾害与环境研究所,成都610041 [2]中国科学院研究生院,北京100041 [3]成都地图出版社,成都610100 [4]成都信息工程学院,成都610225

出　　处：《水土保持研究》2009年第3期6-10,共5页Research of Soil and Water Conservation

基　　金：国家重点基础研究发展规划(2003CB415201);中国科学院“西部之光”项目(2005C20609090)

摘　　要：基于分形理论,借助地理信息系统(GIS)技术对云南省土壤侵蚀强度空间结构分形进行定量研究,结果表明:云南省土壤侵蚀强度空间结构特征客观存在,微度、轻度、中度、强度、极强度、剧烈6个侵蚀强度等级的周长-面积关系客观存在;云南省土壤侵蚀强度中,极强度水力侵蚀分维最大,为1.605;剧烈水力侵蚀分维最小,为1.540;极强度水力侵蚀斑块镶嵌结构最复杂,剧烈水力侵蚀斑块镶嵌结构最简单;以极强度水力侵蚀斑块镶嵌结构的稳定性最高,为0.105,中度水力侵蚀斑块镶嵌结构的稳定性其次,为0.095,而以剧烈水力侵蚀斑块镶嵌结构的稳定性最低,为0.040;剧烈水力侵蚀的平均形状指数最大,为0.156,微度冻融侵蚀的的平均形状指数最小,为0.067;剧烈水力侵蚀的平均紧凑度最大,为0.554,微度冻融侵蚀的的平均紧凑度最小,为0.237。The fractal of spatial structure of erosion intensity in Yunnan Province is discussed in this paper based on GIS. Some significant conclusions are drawn： （1） A certain relationship between perimeter and area of soil erosion intensity patches objectively exists for soil erosion intensity in Yunnan Province. （2） Fractal dimensions of soil erosion intensity of Yunnan Province are calculated. It is the biggest with the very strength water erosion being 1. 605, and the smallest with the fierce water erosion being 1. 504. （3） The stability of spatial structure is the highest with the very strength water erosion being 0. 105,second with the moderate water erosion being 0. 095, and the smallest with the fierce water erosion being 0. 040. （4） The average Shape Index is the highest with the fierce water erosion being 0. 156,and the smallest with the micro-degree freeze-thaw erosion being 0. 067. （5） The average compactness is the highest with the fierce water erosion being 0. 554, and the smallest with the micro-degree freeze-thaw erosion being 0. 237.

关 键 词：地理信息系统(GIS) 分形分维 土壤侵蚀强度 稳定性指数 形状指数 

分 类 号：S157.1[农业科学—土壤学]