天津师范大学学报（自然科学版）2025，Vol.45Issue(1)：52-59,68,9.DOI:10.19638/j.issn1671-1114.20250108
基于小波分析的土壤体积含水量动态研究
Dynamic study of soil volumetric water content based on wavelet analysis
摘要
Abstract
In order to study the rule of soil water transport under natural conditions,based on the soil water data in different vegetation areas in the agricultural comprehensive test field of Oklahoma State University of USA from 2010 to 2016,the response models of soil water to different meteorological indexes and vegetation were analyzed using cross wavelet and wavelet coherence methods.The results showed that:① The average annual soil volumetric water contents of sequoia,oak forests and grassland were 0.154,0.113 and 0.254 m3/m3,respectively.The soil volumetric water contents of sequoia and oak forests were lower than that of grassland under the same conditions throughout the year,and the difference was more statistically sig-nificant in winter.② There was a significant absolute correlation between soil volumetric water content of three different vege-tation and precipitation,temperature on an interannual scale.The causality between precipitation and soil volumetric water content of grassland was weak,while that between precipitation and soil volumetric water content of sequoia forest was strong.There was a strong causal relationship between temperature and soil volumetric water content of grassland,but a weak causal-ity relationship between temperature and soil volumetric water content of sequoia forest.③ On the intermonthly to semi-annual scale,the causality relationship between soil volumetric water content of three regetations and temperature was weak,while the causality relationship between soil volumetric water content and precipitation was strong.④The peak of soil volumetric water content occured earlier than the peaks of precipitation and temperature in the same year.These differences are related to the differences in the water retention capacity and water absorption capacity of roots,as well as the insulation capacity and cover-age area of leaves in different vegetation.关键词
土壤体积含水量/交叉小波/小波相干/相关性分析/植被/降水Key words
soil volumetric water content/cross wavelet/wavelet coherence/correlation analysis/vegetation/precipitation分类
数学引用本文复制引用
吴越,郝慧清,郝永红,盖玉婧,李泽溦,刘彦..基于小波分析的土壤体积含水量动态研究[J].天津师范大学学报（自然科学版）,2025,45(1):52-59,68,9.基金项目
国家自然科学基金资助项目(42072277,U2244214,41272245,40972165,40572150,42307088) （42072277,U2244214,41272245,40972165,40572150,42307088）
天津师范大学研究生科研创新项目(2023KYCX056Y,2022KYCX108Y). （2023KYCX056Y,2022KYCX108Y）
