KMS Institute of soil and water conservation Chinese Academy of Sciences
| Soil moisture dynamics and dominant controls at different spatial scales over semiarid and semi-humid areas | |
| Lizhu Suo1; Mingbin Huang1; Yongkun Zhang2,3; Liangxia Duan4; Yan Shan4; 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. | |
| 文章类型 | Article |
| 2018 | |
| 发表期刊 | JOURNAL OF HYDROLOGY
 |
| ISSN | 0022-1694 |
| 通讯作者邮箱 | hmbd@nwsuaf.edu.cn |
| 卷号 | 562页码:635-647 |
| 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. |
| 关键词 | Environmental Factors Scale Dependency Soil Depth Partial Least Squares Regression Loess Plateau |
| 学科领域 | Engineering ; Geology ; Water Resources |
| DOI | 10.1016/j.jhydrol.2018.05.036 |
| 收录类别 | SCI |
| 出版地 | PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| 语种 | 英语 |
| WOS记录号 | WOS:000438003000049 |
| 出版者 | ELSEVIER SCIENCE BV |
| 项目资助者 | NSFC-RCUK_NERC [41571130082] ; NSFC-RCUK_NERC [41571130082] ; National Natural Science Foundation of China [41390463, 41571213] ; National Natural Science Foundation of China [41390463, 41571213] |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | sbir.nwafu.edu.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.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 3.MWR, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lizhu Suo,Mingbin Huang,Yongkun Zhang,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 | Lizhu Suo,Mingbin Huang,Yongkun Zhang,Liangxia Duan,Yan Shan,&Huang, MB .(2018).Soil moisture dynamics and dominant controls at different spatial scales over semiarid and semi-humid areas.JOURNAL OF HYDROLOGY,562,635-647. |
| MLA | Lizhu Suo,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. |
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