IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Spatial and temporal variability of 0-to 5-m soil-water storage at the watershed scale
Fu, Zihuan1,2; Wang, Yunqiang1,3; An, Zhisheng1,3; Hu, Wei4; Mostofa, Khan M. G.2; Li, Xuezhang5; Liu, Bingxia6
AbstractDynamic relationships among rainfall patterns, soil water distribution, and plant growth are crucial for sustainable conservation of soil and water resources in water-limited ecosystems. Spatial and temporal variation in deep soil water content at a watershed scale have not yet been characterized adequately due to the lack of deep soil water data. Deep soil-water storage (SWS) up to a depth of 5m (n=73) was measured at 19 sampling occasions at the LaoYeManQu watershed on the Chinese Loess Plateau (CLP). At a depth of 0-1.5m, the annual mean SWS was highly correlated with rain intensity, and the correlation decreased with depth, but within the layers at 1.5-5.0m, the changes in SWS indicated a lag between precipitation and the replenishment of soil water. Geostatistical parameters of SWS were also highly dependent on depth, and the mean SWS presented similar spatial structures in two adjacent layers. Temporal stability of SWS as indicated by mean relative difference, standard deviation of the relative difference (SDRD), and mean absolute bias error (MABE) was significantly weaker at the shallow than at deeper layers. Soil separates and organic carbon content controlled the spatial pattern of SWS at the watershed scale. One representative location (Site 57) was identified to estimate the mean SWS in the 1- to 5-m layer of the watershed. Semivariograms of the SDRD and MABE were best fitted by an isotropic spherical model, and their spatial distributions were depth-dependent. Both temporal stability and spatial variability of SWS increased over depth. This study is helpful for deep SWS estimation and sustainable management of soil and water on the CLP, and for other similar regions around the world.
KeywordDeep Soil Depth-dependency Geostatistics Loess Plateau Soil-water Dynamics Temporal Stability
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
Project Number2015KTZDNY01-04
WOS Research AreaWater Resources
WOS SubjectWater Resources
WOS IDWOS:000440036100008
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWang, Yunqiang
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
2.Tianjin Univ, Inst Surface Earth Syst Sci Res, Tianjin 300072, Peoples R China
3.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing 100875, Peoples R China
4.New Zealand Inst Plant & Food Res Ltd, Private Bag 4704, Christchurch 8140, New Zealand
5.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China
6.Chinese Acad Sci, Inst Genet & Dev Biol, Ctr Agr Resources Res, Key Lab Agr Water Resources, Shijiazhuang 050021, Hebei, Peoples R China
Recommended Citation
GB/T 7714
Fu, Zihuan,Wang, Yunqiang,An, Zhisheng,et al. Spatial and temporal variability of 0-to 5-m soil-water storage at the watershed scale[J]. HYDROLOGICAL PROCESSES,2018,32(16):2557-2569.
APA Fu, Zihuan.,Wang, Yunqiang.,An, Zhisheng.,Hu, Wei.,Mostofa, Khan M. G..,...&Liu, Bingxia.(2018).Spatial and temporal variability of 0-to 5-m soil-water storage at the watershed scale.HYDROLOGICAL PROCESSES,32(16),2557-2569.
MLA Fu, Zihuan,et al."Spatial and temporal variability of 0-to 5-m soil-water storage at the watershed scale".HYDROLOGICAL PROCESSES 32.16(2018):2557-2569.
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