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Issue:
The Month Precipitation in Jinghe River Basin Considering Data-transformation
Author(s):
LIU Peng
,
ZHANG Wan-chang
Pages:
1
-
4
Year:
2008
Issue:
4
Journal:
RESEARCH OF SOIL AND WATER CONSERVATION
Keyword:
偏斜度分析
;
数据变换
;
普通克里格法
;
梯度距离平方反比法
;
Abstract:
对泾河流域各站点1951-2005年多年平均月降雨量数据进行偏斜度分析.并分别做平方根、立方根、对数变换;根据泾河流域自然地理特征选择普通克里格法和梯度距离平方反比法对变换前后的月均降雨量数据进行空间插值,通过交叉验证的检验方法得到以下结论:偏斜度分析对于空间插值意义不大;两种插值方法都是对数变换后的数据插值结果较优,同时考虑高程的梯度距离平方反比法无论数据变换与否其插值精度都没有普通克里格法的精度高.选择对数变换和普通克里格法进行泾河流域多年平均月降雨量插值效果较好,为日降水插值的获得提供了可靠的本底文件.
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