干旱区生态环境知识资源中心(Arid): 青海湖湖东克土沙地地温插值方法研究

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	青海湖湖东克土沙地地温插值方法研究
其他题名	Spatial interpolation method of soil temperature of Ketu desert on east of Qinghai Lake
	崔建新 1; 常宏 2; 刘泉均 2
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2012
卷号	30 期号:5 页码:185-192
中文摘要	对青海湖湖东克土沙地2010年6月份和8月份从6cm到71cm深度的8个层位土壤地温数据进行了插值方法上的对比研究,定量化评估了普通克里格(OK)、径向基函数法(RBF)以及反距离权重法(IDW)的预测精度。结果表明:OK方法与RBF插值结果在有数据监测点的沙梁位置具有高度一致性,但是在沙梁边缘区域表现出了较大的差异。而IDW插值结果比前两者预测结果要低。结合交叉验证以及站点验证结果,OK插值结果精度最高,RBF方法次之,IDW方法精度最低。因此,OK方法是该研究区内最佳的拟合模型。另外,模型预测精度受到样点分布以及土壤温度的季节变率等诸多因素影响。
英文摘要	Based on the spatial interpolation technique served by GIS,this paper evaluated the prediction accuracies of three interpolation methods,i.e.Ordinary Krig(OK),Radical Basis Functions(RBF)and Inverse Distance Weighting(IDW).Not only do these techniques have the capability of producing a prediction surface,but they can also provide some measure of the certainty or accuracy of the predictions.The results showed that there was a high similarity between Ok and RBF methods at the location of sand beam on which the measurement were conducted.However,there was a big discrepancy at the edge of the interpolation surface.The prediction temperature result of IDW method was lower than that of the OK and RBF methods.Companied with the results of cross-validation and site-validation,we could find that the fitting capacity of these methods follow the sequence of OK>RBF>IDW.Therefore,the OK method was used to produce the spatial patterns of soil temperature over the study area.In addition,the accuracy of the predictions was impacted by several factors,including sample distribution,season variability of soil temperature and so on.
中文关键词	青海湖 ; 土壤温度 ; 插值方法 ; 预测精度
英文关键词	Qinghai Lake soil temperature interpolation method prediction accuracy
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4638233
来源机构	陕西师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227970
作者单位	1.陕西师范大学西北历史环境与经济社会发展研究院, 西安, 陕西 710062, 中国; 2.中科院地球环境研究所, 黄土与第四纪地质国家重点实验室, 西安, 陕西 710075, 中国
推荐引用方式 GB/T 7714	崔建新,常宏,刘泉均. 青海湖湖东克土沙地地温插值方法研究[J]. 陕西师范大学,2012,30(5):185-192.
APA	崔建新,常宏,&刘泉均.(2012).青海湖湖东克土沙地地温插值方法研究.干旱地区农业研究,30(5),185-192.
MLA	崔建新,et al."青海湖湖东克土沙地地温插值方法研究".干旱地区农业研究 30.5(2012):185-192.