干旱区生态环境知识资源中心(Arid): Mechanisms and feedbacks for evapotranspiration-induced salt accumulation and precipitation in an arid wetland of China

Arid

DOI	10.1016/j.jhydrol.2018.11.004
	Mechanisms and feedbacks for evapotranspiration-induced salt accumulation and precipitation in an arid wetland of China
	Liu, Bing 1; Zhao, Wenzhi1 ; Wen, Zijuan 2; Yang, Yuting 3; Chang, Xuexiang 1; Yang, Qiyue 1; Meng, YangYang 1; Liu, Chan 1
通讯作者	Liu, Bing
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2019
卷号	568 页码:403-415
英文摘要	Salt dissolved in soil water is transported upward to the soil surface through capillary rise from shallow groundwater, leading to salt accumulation near the surface and salinization of wetlands in arid regions. However, it is not clear how the mechanism and feedback for evapotranspiration induces salt accumulation and precipitation. Here, we developed a model to simulate the transport of water, solutes, and heat, and measured the meteorological, hydrological, and hydraulic parameters of soil using field experiments to calibrate the model for riparian and saltmarsh wetlands in northwestern China. The results showed that the annual atmospheric precipitation averaged 125.3 +/- 10.2 mm in two types of wetlands, the evapotranspiration, depth to the groundwater and soil salinity averaged 587.7 nun yr(-1), 85.4 +/- 5.4 cm and 29.80 g kg(-1) in the riparian wetland, while 637.2 mmyr(-1), 129.7 +/- 15.1 cm and 63.64 g kg(-1) in the saltmarsh wetland, respectively. We found that the flux of liquid water, flux of water vapor, salinity, and efflorescence had maximum values of 1.23 mm day(-1), 0.22 mm day(-1), 104.16 g kg(-1), and 2.10 cm in the riparian wetland, respectively, versus 1.28 mm day(-1), 0.32 mm day(-1), 202.02 g kg(-1), and 3.70 cm in the saltmarsh wetland. Our simulations show that the salinity increases significantly with increasing evapotranspiration, soil temperature, saturated water content, and groundwater depth in the saltmarsh wetland, but that the effects of saturated water content and groundwater depth were small in the riparian wetland. As a result of these factors, the efflorescence pattern exhibited characteristic seasonal and inter-annual variability in which complex interactions among atmospheric precipitation, evapotranspiration, groundwater, and river water provided the long-term driving forces for water flow and salt transport. We found that the increasing efflorescence disrupted evaporation more than sub-florescence, which reduced the soil porosity and possibly affected water vapor transport.
英文关键词	Salt accumulation Salt efflorescence Atmospheric precipitation Evapotranspiration Groundwater
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000455694400032
WOS关键词	WATER-TABLE DEPTH ; FRESH-WATER ; SALINITY ; GROUNDWATER ; EVAPORATION ; TRANSPORT ; VAPOR ; HYDROLOGY ; ENERGY ; SOILS
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	兰州大学 ; 清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217121
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lab Heihe River Ecohydrol & Basin Sci, Linze Inland River Basin Res Stn, Lanzhou 730000, Gansu, Peoples R China; 2.Lanzhou Univ, Sch Math & Stat, Lanzhou 730000, Gansu, Peoples R China; 3.Tsinghua Univ, Dept Hydraul Engn, State Key Lab Hydrosci & Engn, Beijing 10084, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bing,Zhao, Wenzhi,Wen, Zijuan,et al. Mechanisms and feedbacks for evapotranspiration-induced salt accumulation and precipitation in an arid wetland of China[J]. 兰州大学, 清华大学,2019,568:403-415.
APA	Liu, Bing.,Zhao, Wenzhi.,Wen, Zijuan.,Yang, Yuting.,Chang, Xuexiang.,...&Liu, Chan.(2019).Mechanisms and feedbacks for evapotranspiration-induced salt accumulation and precipitation in an arid wetland of China.JOURNAL OF HYDROLOGY,568,403-415.
MLA	Liu, Bing,et al."Mechanisms and feedbacks for evapotranspiration-induced salt accumulation and precipitation in an arid wetland of China".JOURNAL OF HYDROLOGY 568(2019):403-415.