| 基于DEM的土壤理化性质空间统计与三维表达——以湖南醴陵市为例 |
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| 引用本文： | 崔卫国,文倩,吴大放,杨君,刘艳艳.基于DEM的土壤理化性质空间统计与三维表达——以湖南醴陵市为例[J].地理与地理信息科学,2007,23(3):78-82. |
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| 作者姓名： | 崔卫国 文倩 吴大放 杨君 刘艳艳 |
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| 作者单位： | 1. 中国科学院广州地球化学研究所GIS实验室,广东,广州,510640;中国科学院研究生院,北京,100019
2. 湖南农业大学资源环境学院,湖南,长沙,410128 |
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| 基金项目： | 湖南农业大学人才引进项目“区域土地利用/覆被变化与生态环境响应机制”(690502) |
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| 摘 要： | 以土壤图、地貌分区图、地形图、土壤普查及野外实际调查资料为数据源,利用GIS软件建立DEM并进行高程分带和空间叠置分析等,研究湖南醴陵市土壤空间分布及其理化性质与地形因子的相互关系。结果表明:土壤空间分布具有强烈的区域差异性,不同地貌分区和高程区域土壤组合不同,同一土壤类型在各地貌分区和高程区域的分布面积也不同;土壤理化性质与海拔高程具有显著相关性,随海拔高程增加,土壤有机质和全氮含量减少,阳离子代换量降低,土壤pH值升高、酸性减弱。据此构建研究区土壤空间分布三维可视化模型,直观再现土壤空间分布与所处地理环境的关系。
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| 关 键 词： | 数字高程模型(DEM) 土壤性质 空间分析 三维显示 湖南醴陵市 |
| 文章编号： | 1672-0504（2007）03-0078-05 |
| 修稿时间： | 2007-02-012007-04-12 |
Spatial Statistics and Three-Dimension Expression of Soil Types and Its Properties Based on DEM:A Case Study of Liling,Hunan |
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| CUI Wei-guo,WEN Qian,WU Da-fang,YANG Jun,LIU Yan-yan.Spatial Statistics and Three-Dimension Expression of Soil Types and Its Properties Based on DEM:A Case Study of Liling,Hunan[J].Geography and Geo-Information Science,2007,23(3):78-82. |
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| Authors: | CUI Wei-guo WEN Qian WU Da-fang YANG Jun LIU Yan-yan |
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| Institution: | 1. GIS Lab of Guangzhou Geochemistry Institute, Chinese Academy of Sciences, Guangzhou 510640 ; 2. Graduate University of Chinese Academy of Sciences, Beijing 100019 ; 3. College of Resources and Environment, Hunan Agriculture University, Changsha 410128, China |
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| Abstract: | The spatial distribution and interrelationship of soil properties and altitude was analyzed in this study,which was based on the soil map,geomorphologic map,and field survey by creating DEM,extracting terrain factors and overlaying.The results showed that the spatial distribution of soil had significant regional variation,and the correlation between soil properties and elevation was significant.The content of soil organic matter,total nitrogen and cationic exchange content decreased while the altitude increased,except the soil pH.In the end,the three-dimension visualization model of soil spatial distribution was created,which displayed the relationship between soil type distribution and environment directly,and could help to understand how the spatial distribution of soil and its properties changed with the terrain. |
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| Keywords: | DEM soil properties spatial analyst three-dimension visualization Liling city of Hunan |
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