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Soil moisture variations at different topographic domains and land use types in the semi-arid Loess Plateau, China
Yu, Bowei1,2; Liu, Gaohuan1; Liu, Qingsheng1; Wang, Xiaoping3; Feng, Jiuliang3; Huang, Chong1
2018-06-01
Source PublicationCATENA
ISSN0341-8162
Volume165Pages:125-132
Corresponding AuthorLiu, Qingsheng(liuqs@lreis.ac.cn)
AbstractSoil moisture plays a fundamental role in eco-hydrological processes in the semi-arid Loess Plateau. Catchments on the Loess Plateau can be generally divided into the hillslope domain and gully domain. However, the soil moisture variations linked to topographic domains and land use types remain poorly understood. Therefore, in this study, differences in soil moisture among three typical land use types (forestland, native grassland, and farmland) were investigated and compared between the spatial domains of hillslope and gully in the Jiegou catchment on the semi-arid Loess Plateau of China. Additionally, the spatial variations in the soil moisture of the 0-100 cm layers were explored in both wet and dry periods to evaluate the seasonal effects of different spatial domains and land use types. The results showed that including gully soil moisture weakly increased the spatially averaged soil moisture in the catchment but obviously increased the variability during wet periods. In contrast, the spatial means decreased weakly while the variability obviously decreased during dry periods. Soil moisture in forestland was lower than that in native grassland and farmland at all spatial domains during both wet and dry periods. The results also indicated that surface soil moisture (0-10 cm) differs between spatial domains but not land use types, which mainly due to the differences of evapotranspiration on the two topographic domains. In contrast, deep soil moisture (80-100 cm) differs among land use types but not spatial domains, which because of the differences of root water uptake among land use types. In addition, slope aspect played a more important role than slope gradient and elevation in the distribution of soil moisture at the hillslope domain. This was because the slope aspect affected the ground temperature by receiving different solar radiation, and further affected the soil evaporation and vegetation transpiration. Therefore, the results of this study indicates that both topographic domains and land use types should be considered when attempting to characterize soil moisture variability or modelling surface hydrological processes at catchment scale in heavily gullied regions.
KeywordSoil moisture Spatial domain Land use Topography Loess Plateau
DOI10.1016/j.catena.2018.01.020
WOS KeywordWATER-CONTENT ; SPATIAL VARIABILITY ; CATCHMENT ; SCALE ; DYNAMICS ; ECOHYDROLOGY ; RESTORATION ; VEGETATION ; PATTERNS ; TRANSECT
Indexed BySCI
Language英语
Funding ProjectState Key Laboratory of Resources and Environmental Information System, Chinese Academy of Sciences[08R8A010YA]
Funding OrganizationState Key Laboratory of Resources and Environmental Information System, Chinese Academy of Sciences
WOS Research AreaGeology ; Agriculture ; Water Resources
WOS SubjectGeosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS IDWOS:000430994900013
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/55032
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLiu, Qingsheng
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Inst Soil & Water Conservat Shanxi Prov, Taiyuan 030013, Shanxi, Peoples R China
Recommended Citation
GB/T 7714
Yu, Bowei,Liu, Gaohuan,Liu, Qingsheng,et al. Soil moisture variations at different topographic domains and land use types in the semi-arid Loess Plateau, China[J]. CATENA,2018,165:125-132.
APA Yu, Bowei,Liu, Gaohuan,Liu, Qingsheng,Wang, Xiaoping,Feng, Jiuliang,&Huang, Chong.(2018).Soil moisture variations at different topographic domains and land use types in the semi-arid Loess Plateau, China.CATENA,165,125-132.
MLA Yu, Bowei,et al."Soil moisture variations at different topographic domains and land use types in the semi-arid Loess Plateau, China".CATENA 165(2018):125-132.
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