气候变化领域集成服务门户(CCPortal): Spatio-temporal dynamics and eco-hydrological controls of water and salt migration within and among different land uses in an oasis-desert system

CCPortal

DOI	10.1016/j.scitotenv.2021.145572
	Spatio-temporal dynamics and eco-hydrological controls of water and salt migration within and among different land uses in an oasis-desert system
	Yin, Xinwei; Feng, Qi; Zheng, Xinjun; Zhu, Meng; Wu, Xue; Guo, Yong; Wu, Min; Li, Yan
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	772
英文摘要	Identifying the eco-hydrological processes associated with water-salt dynamics is important for the sustainable management of water resources and eco-environmental systems in groundwater-dependent ecosystems, especially across different land use types in salt-affected oasis-desert ecosystems. In this study, a typical cropland-shelterbelt-desert site at the oasis-desert system in the Sangong River watershed of northwestern China was selected to investigate the spatio-temporal variations of water-salt dynamics using the Spearman rank correlation analysis and water/mass balance analysis, and to identify the response of vegetation dynamics to water-salt variations based on a model framework for vegetation-salinity-groundwater interactions, within and among these land uses during crop growth period (CGP: April 1-June 28, 2018) and non-crop-growth period (Non-CGP: June 29-October 31, 2018). Results showed that the soil water content (SWC) and soil electrical conductivity (SEC) had clear vertical stratification, horizontal transition and seasonal fluctuation characteristics during both CGP and Non-CGP. Significant differences in groundwater depth and salinity were exhibited between both study periods. The water exchange flux (WEF) and salt exchange flux (SEF) in both the cropland and shelterbelt were closely related to irrigation events and evidently higher than that in desert. The cropland maintained a salt accumulation state (especially at the >60-80 cm soil layer) during CGP. Hydrological links and salt transport processes among adjacent land uses have been weakened owing to the application of water-saving irrigation in cropland and the significantly declined of regional groundwater tables. Groundwater pumping and lateral groundwater flow (LGWF) were the most important media for water-salt exchange in the site. The interactions of vegetation with both the soil water-salt balance and groundwater dynamics may cause a discontinuous and irreversible ecosystem response to changes in land use or environmental conditions. Anthropogenic processes, especially the development of modem water-saving irrigation agriculture with groundwater-fed, are dominating the vegetation-salinity-groundwater interactions and its ecohydrological consequences in this ecosystem. Adaptive management of water and salt migration in soil and groundwater is essential for maintaining the coexistence of oasis-desert ecosystems in arid areas. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Soil moisture; Soil salinity; Groundwater; Vegetation-salinity-groundwater interactions; Land use type; Oasis-desert system
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000628753700137
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239437
作者单位	[Yin, Xinwei; Feng, Qi; Zhu, Meng; Wu, Min] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Lanzhou 730000, Peoples R China; [Yin, Xinwei; Guo, Yong; Wu, Min] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zheng, Xinjun; Guo, Yong] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; [Zheng, Xinjun; Guo, Yong] Chinese Acad Sci, Fukang Stn Desert Ecol, Fukang 831505, Xinjiang, Peoples R China; [Wu, Xue] Xinjiang Univ, Coll Resources & Environm Sci, Urumqi 830046, Peoples R China; [Li, Yan] Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China
推荐引用方式 GB/T 7714	Yin, Xinwei,Feng, Qi,Zheng, Xinjun,et al. Spatio-temporal dynamics and eco-hydrological controls of water and salt migration within and among different land uses in an oasis-desert system[J]. 中国科学院西北生态环境资源研究院,2021,772.
APA	Yin, Xinwei.,Feng, Qi.,Zheng, Xinjun.,Zhu, Meng.,Wu, Xue.,...&Li, Yan.(2021).Spatio-temporal dynamics and eco-hydrological controls of water and salt migration within and among different land uses in an oasis-desert system.SCIENCE OF THE TOTAL ENVIRONMENT,772.
MLA	Yin, Xinwei,et al."Spatio-temporal dynamics and eco-hydrological controls of water and salt migration within and among different land uses in an oasis-desert system".SCIENCE OF THE TOTAL ENVIRONMENT 772(2021).