Arid
DOI10.1016/j.jhydrol.2018.02.012
Soil water movement in the unsaturated zone of an inland arid region: Mulched drip irrigation experiment
Han, Dongmei1,2; Zhou, Tiantian1,2
通讯作者Han, Dongmei
来源期刊JOURNAL OF HYDROLOGY
ISSN0022-1694
EISSN1879-2707
出版年2018
卷号559页码:13-29
英文摘要

Agricultural 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.


英文关键词Arid region Soil water movement Groundwater table Stable isotopes Cotton field Drip irrigation
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000430902000002
WOS关键词OXYGEN STABLE-ISOTOPES ; VADOSE-ZONE ; NORTHWEST CHINA ; DRYLAND SALINITY ; LOESS PLATEAU ; GROUNDWATER RECHARGE ; SOLUTE TRANSPORT ; SHALLOW GROUNDWATER ; TEMPORAL STABILITY ; SOUTHERN AUSTRALIA
WOS类目Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Engineering ; Geology ; Water Resources
来源机构中国科学院地理科学与资源研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211057
作者单位1.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
推荐引用方式
GB/T 7714
Han, Dongmei,Zhou, Tiantian. Soil water movement in the unsaturated zone of an inland arid region: Mulched drip irrigation experiment[J]. 中国科学院地理科学与资源研究所,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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