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降雨空间插值方法在石羊河流域的应用

发表时间:2012-11-15  浏览量:1350  下载量:689
全部作者: 邢钊,马金辉,周伟,唐志光
作者单位: 兰州大学资源环境学院
摘 要: 分别将普通克里格插值法(ordinary Kriging)、协同克里格插值法(co-Kriging)和反距离加权插值法(inverse distance weighting,IDW)3种空间插值方法应用于石羊河流域的降雨空间插值,比较它们的应用效果,并分析它们插值效果不同的原因。其中协同克里格法在应用时考虑了海拔高度对降雨量插值结果的影响。结果表明:2种克里格方法的插值结果的误差远远小于反距离加权法,并且插值所得到的等雨量线更光滑。对于2种克里格方法,协同克里格法要优于普通克里格法。反距离加权法明显不如2种克里格法的原因是该方法不能准确反映相邻站点的空间依赖关系。而协同克里格法优于普通克里格法是因为协同克里格插值法考虑到了地形对降雨量的影响,因而更适用于石羊河这样的山地流域。
关 键 词: 地图学;降雨;空间插值;普通克里格法;协同克里格法;反距离加权法
Title: Applications of rainfall spatial interpolation methods in Shiyang River basin
Author: XING Zhao, MA Jinhui, ZHOU Wei, TANG Zhiguang
Organization: College of Earth and Environmental Sciences, Lanzhou University
Abstract: The three spatial interpolation methods are applied to the rainfall spatial interpolation for the Shiyang River basin: ordinary Kriging, co-Kriging and inverse distance weighting (IDW). Their application results are compared and analyzed. For the co-Kriging method, the altitudes of the raingauges are considered to improve the interpolation results. The results show that, the interpolation errors of the 2 Kriging methods are much smaller than that of the IDW method. Also, the isohyet lines produced by the 2 Kriging methods are much smoother than that by the IDW method. For the 2 Kriging methods, the co-Kriging is superior than the ordinary Kriging, in the sense that. The reason for the IDW method being inferior than the 2 Kriging methods is that, the IDW method cannot take into account the spatial dependencies of adjacent raingauges in the basin. The reason of co-Kriging being superior than the ordinary Kriging is that the former taking into account of the topographic effects on rainfalls, therefore more suitable for mountainous river basins like ShiyangRiver.
Key words: cartography; rainfall; spatial interpolation; ordinary Kriging; co-Kriging; inverse distance weighting
发表期数: 2012年11月第21期
引用格式: 邢钊,马金辉,周伟,等. 降雨空间插值方法在石羊河流域的应用[J]. 中国科技论文在线精品论文,2012,5(21):2074-2078.
 
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