中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Spatio-temporal variability and temporal stability of water contents distributed within soil profiles at a hillslope scale

文献类型:SCI/SSCI论文

作者Gao L.; Shao, M. G.; Peng, X. H.; She, D. L.
发表日期2015
关键词Profile soil water content Controlling factor Hillslope hydrology Rainwater replenishment depth Semi-arid area remote-sensing footprints loess plateau moisture variability spatial-patterns neutron probe storage china time surface layers
英文摘要Information about soil water content (SWC) within soil profiles in terms of its spatio-temporal variability and temporal stability is crucial when selecting appropriate soil water management practices. However, detailed profile distribution features for related indices are not clear on the Chinese Loess Plateau. This study aimed to investigate the depth dependency of spatio-temporal variability and temporal stability of SWC at the hillslope scale using an intensive sampling strategy for both horizontal and vertical directions as well as over time. The SWCs at 20 depths within 0-300 cm soil profiles were measured on 20 occasions between July 2008 and October 2010 at 91 locations on a hillslope on the Loess Plateau, China. Results showed that although the profile distributions of investigated statistical parameters differed greatly, they were all depth dependent. Based on both the spatio-temporal variability and the temporal stability characteristics using eight indices, the studied soil profile (0-300 cm) could be divided into three soil layers, i.e., 0-60, 60-160 and 160-300 cm, with a characteristic feature of "irregularly changing", "regularly changing", and "relatively constant", respectively. The deepest rainwater replenishment depth was approximately 160 cm. Therefore, choosing 200 cm as the sampling depth would be sufficient in similar areas. Such findings are useful for designing an optimal strategy for sampling and management of profile soil moisture. (C) 2015 Elsevier B.V. All rights reserved.
出处Catena
132
29-36
收录类别SCI
语种英语
ISSN号0341-8162
源URL[http://ir.igsnrr.ac.cn/handle/311030/38623]  
专题地理科学与资源研究所_历年回溯文献
推荐引用方式
GB/T 7714
Gao L.,Shao, M. G.,Peng, X. H.,et al. Spatio-temporal variability and temporal stability of water contents distributed within soil profiles at a hillslope scale. 2015.

入库方式: OAI收割

来源:地理科学与资源研究所

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