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Spatial Variation of Shallow and Deep Soil Moisture in the Semi-arid Loess Hilly Area, China : Volume 9, Issue 4 (05/04/2012)

By Yang, L.

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Book Id: WPLBN0004013301
Format Type: PDF Article :
File Size: Pages 34
Reproduction Date: 2015

Title: Spatial Variation of Shallow and Deep Soil Moisture in the Semi-arid Loess Hilly Area, China : Volume 9, Issue 4 (05/04/2012)  
Author: Yang, L.
Volume: Vol. 9, Issue 4
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Chen, L., Jia, F., Wei, W., Mo, B., & Yang, L. (2012). Spatial Variation of Shallow and Deep Soil Moisture in the Semi-arid Loess Hilly Area, China : Volume 9, Issue 4 (05/04/2012). Retrieved from

Description: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Soil moisture in deep soil layers is the only relatively stable water resource for introduced vegetation in the semi-arid Loess Plateau of China. Characterizing the spatial variation of deep soil moisture is significant for vegetation restoration with respect to the topographic conditions. In this study, we focused on analyzing the spatial variations and influencing factors of soil moisture content (SMC) in shallow (0–2 m) and deep (2–8 m) soil layers based on soil moisture observation in the Longtan watershed. The vegetation type of each sampling site for each comparison is same, while varies with slope position, slope gradient, or slope aspect. The following results are found: (1) compared with shallow SMC, slope position and slope aspect may affect shallow soil moisture more, rather than deep layers. Slope gradient however, affect both shallow and deep soil moisture significantly. It indicates that high difference of deep soil hydrological processes between shallow and deep soil moisture remains, which can be attributed to the introduced vegetation and topography. (2) The vegetation growth condition has significant negative relation with deep soil moisture. This result indicates that plants under different growth conditions may consume soil moisture differently, thus causing higher spatial variation of deep soil moisture. (3) The dynamic role of slope position and slope aspect on deep SMC has been changed by introduced vegetation in semi-arid environment. Consequently, vegetation growth condition and slope gradient may be the major factor contributing to the spatial variation of deep soil moisture.

Spatial variation of shallow and deep soil moisture in the semi-arid loess hilly area, China

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