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Soil water movement in the unsaturated zone of an inland arid region: Mulched drip irrigation experiment
Han, Dongmei1,2; Zhou, Tiantian1,2
2018-04-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume559Pages:13-29
Corresponding AuthorHan, Dongmei(handm@igsnrr.ac.cn)
AbstractAgricultural irrigation with trans-basin water diversion can effectively relieve the water paucity in arid and semi-arid regions, however, this may be accompanied by eco-environmental problems (e.g., saline soils, rising groundwater levels, water quality problems). The mechanism of soil water movement under irrigation in the unsaturated zone of arid regions is a key scientific problem that should be solved in order to evaluate agricultural water management and further improve current irrigation practices. This study investigated the impact of drip irrigation on soil water movement in the unsaturated zone of a cotton field in an inland arid region (the Karamay Agricultural Development Area), northwest China. Combining in situ observational physical data with temporal variation in stable isotopic compositions of soil water, we described the soil water flow system and mechanism in severe (Plot 1) and mild (Plot 2) saline-alkali cotton fields. The infiltration depths are 0-150 cm for both plots, Drip irrigation scheduling makes no significant contribution to local groundwater recharge, however, groundwater can move into the unsaturated zone through capillary rise during cotton flowering and boll periods. Plot 2 is less prone to having secondary soil salinization than Plot I due to the existence of a middle layer (approximately 100 cm thick), which elongated the distance between the root zone and aquifer. Rise in the water table (approximately 60 cm for Plot 1 and 50 cm for Plot 2) could be caused by lateral groundwater flow instead of vertical infiltration. We estimated the soil water storage changes in the unsaturated zone and proposed a conceptual model for deciphering the movement process of soil water. This study provides a scientific basis for determining the rise of groundwater levels and potential development of saline soils and improving agricultural water management in arid regions. (C) 2018 Elsevier B.V. All rights reserved.
KeywordArid region Soil water movement Groundwater table Stable isotopes Cotton field Drip irrigation
DOI10.1016/j.jhydrol.2018.02.012
WOS KeywordOXYGEN STABLE-ISOTOPES ; VADOSE-ZONE ; NORTHWEST CHINA ; DRYLAND SALINITY ; LOESS PLATEAU ; GROUNDWATER RECHARGE ; SOLUTE TRANSPORT ; SHALLOW GROUNDWATER ; TEMPORAL STABILITY ; SOUTHERN AUSTRALIA
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41371057] ; Youth Innovation Promotion Association, Chinese Academy Sciences[2012040]
Funding OrganizationNational Natural Science Foundation of China ; Youth Innovation Promotion Association, Chinese Academy Sciences
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000430902000002
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/55076
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHan, Dongmei
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, 11A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Han, Dongmei,Zhou, Tiantian. Soil water movement in the unsaturated zone of an inland arid region: Mulched drip irrigation experiment[J]. JOURNAL OF HYDROLOGY,2018,559:13-29.
APA Han, Dongmei,&Zhou, Tiantian.(2018).Soil water movement in the unsaturated zone of an inland arid region: Mulched drip irrigation experiment.JOURNAL OF HYDROLOGY,559,13-29.
MLA Han, Dongmei,et al."Soil water movement in the unsaturated zone of an inland arid region: Mulched drip irrigation experiment".JOURNAL OF HYDROLOGY 559(2018):13-29.
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