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Soil moisture dynamics and dominant controls at different spatial scales over semiarid and semi-humid areas

文献类型：期刊论文

作者Liangxia Duan2; Huang, MB (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Lizhu Suo3; Mingbin Huang3; Yongkun Zhang1,4; Yan Shan2
刊名JOURNAL OF HYDROLOGY
出版日期2018
卷号562页码:635-647
ISSN号0022-1694
关键词Environmental Factors Scale Dependency Soil Depth Partial Least Squares Regression Loess Plateau
DOI10.1016/j.jhydrol.2018.05.036
文献子类Article
英文摘要Soil moisture dynamics plays an active role in ecological and hydrological processes, and it depends on a large number of environmental factors, such as topographic attributes, soil properties, land use types, and precipitation. However, studies must still clarify the relative significance of these environmental factors at different soil depths and at different spatial scales. This study aimed: (1) to characterize temporal and spatial variations in soil moisture content (SMC) at four soil layers (0-40, 40-100, 100-200, and 200-500 cm) and three spatial scales (plot, hillslope, and region); and (2) to determine their dominant controls in diverse soil layers at different spatial scales over semiarid and semi-humid areas of the Loess Plateau, China. Given the high co-dependence of environmental factors, partial least squares regression (PLSR) was used to detect relative significance among 15 selected environmental factors that affect SMC. Temporal variation in SMC decreased with increasing soil depth, and vertical changes in the 0-500 cm soil profile were divided into a fast-changing layer (0-40 cm), an active layer (40-100 cm), a sub-active layer (100-200 cm), and a relatively stable layer (200-500 cm). PLSR models simulated SMC accurately in diverse soil layers at different scales; almost all values for variation in response (R-2) and goodness of prediction (Q(2)) were > 0.5 and > 0.0975, respectively. Upper and lower layer SMCs were the two most important factors that influenced diverse soil layers at three scales, and these SMC variables exhibited the highest importance in projection (VIP) values. The 7-day antecedent precipitation and 7-day antecedent potential evapotranspiration contributed significantly to SMC only at the 0-40 cm soil layer. VIP of soil properties, especially sand and silt content, which influenced SMC strongly, increased significantly after increasing the measured scale. Mean annual precipitation and potential evapotranspiration also influenced SMC at the regional scale significantly. Overall, this study indicated that dominant controls of SMC varied among three spatial scales on the Loess Plateau, and VIP was a function of spatial scale and soil depth.
学科主题Engineering ; Geology ; Water Resources
出版地PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000438003000049
资助机构NSFC-RCUK_NERC [41571130082] ; NSFC-RCUK_NERC [41571130082] ; National Natural Science Foundation of China [41390463, 41571213] ; National Natural Science Foundation of China [41390463, 41571213] ; NSFC-RCUK_NERC [41571130082] ; NSFC-RCUK_NERC [41571130082] ; National Natural Science Foundation of China [41390463, 41571213] ; National Natural Science Foundation of China [41390463, 41571213]
源URL[http://ir.iswc.ac.cn/handle/361005/8215]  
专题水保所科研产出--SCI_2018--SCI
通讯作者Huang, MB (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
作者单位1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
3.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
4.MWR, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式
GB/T 7714		 Liangxia Duan,Huang, MB ,Lizhu Suo,et al. Soil moisture dynamics and dominant controls at different spatial scales over semiarid and semi-humid areas[J]. JOURNAL OF HYDROLOGY,2018,562:635-647.
APA Liangxia Duan,Huang, MB ,Lizhu Suo,Mingbin Huang,Yongkun Zhang,&Yan Shan.(2018).Soil moisture dynamics and dominant controls at different spatial scales over semiarid and semi-humid areas.JOURNAL OF HYDROLOGY,562,635-647.
MLA Liangxia Duan,et al."Soil moisture dynamics and dominant controls at different spatial scales over semiarid and semi-humid areas".JOURNAL OF HYDROLOGY 562(2018):635-647.

入库方式： OAI收割

来源：水土保持研究所

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