Intra-storm time stability analysis of surface soil water content

Time stability analysis is an important and economical tool to upscale point soil water content (SWC) to larger scales. However, little is known whether and how precipitation affects characteristics of time stability of SWC during rainfall. Based on a high-resolution dataset, we found that medium- a...

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Bibliographic Details
Published in:Geoderma 2019-10, Vol.352, p.33-37
Main Authors: Gao, Xiaodong, Zhao, Xining, Pan, Daili, Yu, Liuyang, Wu, Pute
Format: Article
Language:English
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Summary:Time stability analysis is an important and economical tool to upscale point soil water content (SWC) to larger scales. However, little is known whether and how precipitation affects characteristics of time stability of SWC during rainfall. Based on a high-resolution dataset, we found that medium- and heavy- rainfall events substantially reorganized spatial patterns of SWC, and that the time-stable locations identified for inter-rainfall period produced three to six times larger prediction errors during medium- and heavy- rainfall periods compared with before rainfall events. Accordingly, hydrological application needs to be applied with caution when based on predicated SWC from presumed time-stable locations. •Effect of rainfall on characteristics of soil moisture time stability was examined.•Medium- and heavy-rainfall clearly disorganized spatial patterns of soil moisture.•TSLs for inter-rainfall period produced much larger prediction errors during rainfall.
ISSN:0016-7061
1872-6259
DOI:10.1016/j.geoderma.2019.06.001