| 陕西省水蚀土壤因子指标插值方法比较研究 |
| |
| 引用本文： | 庞国伟,杨勤科,张爱国,李锐.陕西省水蚀土壤因子指标插值方法比较研究[J].水土保持通报,2009,29(2):176-182. |
| |
| 作者姓名： | 庞国伟 杨勤科 张爱国 李锐 |
| |
| 作者单位： | 庞国伟,杨勤科,李锐(西北农林科技大学,资源环境学院,陕西,杨凌,712100;中国科学院,水利部水土保持研究所,陕西,杨凌,712100);张爱国(山西师范大学地理系,山西,临汾,041004) |
| |
| 基金项目： | 国家重点基础研究发展计划 |
| |
| 摘 要： | 基于地统计学原理和半变异理论,采用地理信息系统技术定量研究了陕西省水蚀土壤因子指标的空间变异特征.分析比较了反距离权重法、样条函数法与普通克吕格法对陕西省土壤因子指标空间插值的精度.结果表明,研究区土壤抗冲系数具有中等强度的空间相关性,块金系数为32.29%,而稳渗速率、崩解速率、抗剪强度均表现为强烈的空间相关性,块金系数分别为13.19%,11.61%和12.98%.综合考虑平均相对误差、均方差及插值效果,认为普通克吕格法最好,更能反映土壤参数的空间特征并符合区域水土流失模型对数据的要求.对于普通克吕格法,稳渗速率的Lag步长为30 000 m,半方差理论模型为指数模型;抗冲系数、崩解速率、抗剪强度的Lag步长为55 000,半方差理论模型均为高斯模型.在空间分布上,各指标随土壤类型由北到南呈现明显的地带性规律.
|
| 关 键 词： | 水蚀土壤因子指标 空间插值 反距离权重法 样条函数法 普通克吕格法 |
Comparison of Spatial Interpolation Methods for Soil Variables of Regional Water Erosion Assessment in Shaanxi Province |
| |
| PANG Guo-wei,YANG Qin-ke,ZHANG Ai and LI Rui.Comparison of Spatial Interpolation Methods for Soil Variables of Regional Water Erosion Assessment in Shaanxi Province[J].Bulletin of Soil and Water Conservation,2009,29(2):176-182. |
| |
| Authors: | PANG Guo-wei YANG Qin-ke ZHANG Ai and LI Rui |
| |
| Institution: | College of Resources and Environment,Northwest A & F University,Yangling,Shaanxi 712100,China;Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources, Yangling,Shaanxi 712100,China;;College of Resources and Environment,Northwest A & F University,Yangling,Shaanxi 712100,China;Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources, Yangling,Shaanxi 712100,China;;Geography Department,Shanxi Normal University,Linfen,Shanxi 041004,China;College of Resources and Environment,Northwest A & F University,Yangling,Shaanxi 712100,China;Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources, Yangling,Shaanxi 712100,China; |
| |
| Abstract: | |
| |
| Keywords: | soil variables for regional water erosion spatial interpolation IDW Spline Ordinary Kriging |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《水土保持通报》浏览原始摘要信息 |
| 点击此处可从《水土保持通报》下载免费的PDF全文 |
|
