气象2017，Vol.43Issue(2)：189-196,8.DOI:10.7519/j.issn.1000-0526.2017.02.006
土壤水分观测历史数据集奇异值分析与校正
Analysis and Calibration of Singular Historical Observed Data of Manual Soil Water
摘要
Abstract
In terms of mass water content,field capacity,wilting moisture,and bulk density at 247 agricul-tural meteorological observing stations during 1981-2010 in China,effective quality control method of these data is applied according to climatic characteristics and soil texture as well as the theory of extreme values and relationship in soil hydrological constants.Analysis and calibration of singular historical obser-vation data of manual soil water are conducted through each station and are presented in this paper taking typical stations as examples.As the base detective conditions,mass water content ranging in 0-50% and varying less than 30% during every two depths,field capacity ranging from 10% to 40% and varying less than 20%,wilting moisture ranging from 1% to 13% and varying less than 10%,bulk density ranging from 0 .8 g · cm-3 to 2 .0 g · cm-3 and varying less than 0 .5 g · cm-3 are considered as credible data. Through typical analysis,errors of soil hydrological constants can be divided into three categories including the error of manual record,reduplicative observation and yearly obvious variation.Similarly,errors of mass water content exceedes proper ranges with minimum value of air dried soil moisture content and maxi-mum one of saturated water content.One effective observation series of manual soil water can be obtained through quality control and applied for better understanding and scientific researches.关键词
土壤重量含水量/田间持水量/凋萎湿度/容重/奇异值Key words
mass water content/field capacity/wilting moisture/bulk density/singular value分类
天文与地球科学引用本文复制引用
张蕾,吕厚荃,王良宇..土壤水分观测历史数据集奇异值分析与校正[J].气象,2017,43(2):189-196,8.基金项目
公益性行业(气象)科研专项(GYHY201306045)资助 （气象）
