土壤学报2011，Vol.48Issue(4)：673-682,10.
宁镇地区137Cs与210Pbex坡面分布特征的地统计学分析
GEOSTATISTICAL ANALYSIS OF 137Cs AND 210Pbex DISTRIBUTION CHARACTERISTICS ON SLOPE IN NINGZHEN REGION
摘要
Abstract
In order to explore in depth intrinsic mechanism of using nuclide tracer technique to study soil erosion deeply, spatial heterogeneity and distribution of 137Cs & 210Pbex in a slope in Ningzhen region were studied with the geosta-tistics method based on the module of Arcgis Geostatistics. Results shows that the unique physicochemical properties of 137Cs & 210Pbex make them distinct from others in spatial heterogeneity and distribution characteristics in slope. The biggish Nugget of 137Cs & 210Pbex indicates that their spatial distribution is definitively influenced by random factors such as soil erosion, fanning practices, etc. . And it is why they can be used to trace soil erosion. The medium degree of spatial autocorrelation and distribution patterns of 137Cs on slope reflect preferably that landform as a structural factor can influence its spatial distribution. Results of the tracing of soil erosion using Cs should be more comprehensive, more reasonable, and more macroscopical. The very week spatial autocorrelation of 210Pbex explain that its spatial distribution is more sensitive to the influence of random factors. And it is better at exposing details of soil erosion. The distribution patterns on a slope differ quite much between 137Cs & 210Pbex, which, on the one hand, indicates that they differ from each other quite sharply in their initial sedimentation layout, partial physicochemical properties, and responses to various affecting factors for variation, etc. And on the other hand, it also hints that the courses of soil erosion traced with l37Cs and 210Pbex can hardly reach an agreement even through adjustment of their calculation models.关键词
地统计学/137Cs与210pbex/坡面分布特征/空间异质性/Arcgis/宁镇地区Key words
Geostatistics/137Cs & 210Pbex/ Distribution characteristics in a slope/ Spatial heterogeneity/ Arcgis/ Ningzhen region分类
农业科技引用本文复制引用
隋志龙,杨浩,杨九东,黄春霞,王小雷,张明礼..宁镇地区137Cs与210Pbex坡面分布特征的地统计学分析[J].土壤学报,2011,48(4):673-682,10.基金项目
江苏省教育厅重点项目(09 KJA170002)、江苏省土木工程与防灾减灾重点实验室项目(JSCE0702)、国家自然科学基金项目(40873071)和国家自然科学基金重点项目(41030751)联合资助 （09 KJA170002）
