干旱区生态环境知识资源中心(Arid): Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study

Arid

DOI	10.1016/j.still.2020.104894
	Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study
	Li, Shan; Wu, Miao; Jia, Zhonghua; Luo, Wan; Fei, Liangjun; Li, Jingsi
通讯作者	Li, S (corresponding author), Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg, Xian, Peoples R China.
来源期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
EISSN	1879-3444
出版年	2021
卷号	208
英文摘要	Ditch wetlands reduce agricultural nonpoint source pollution and protect the water environment in drainage areas. One effective management option is controlled drainage. However, for ditch wetlands receiving salt-laden drainage water in arid or semi-arid irrigation areas, controlled drainage may lead to eventual build up of salinity to critical levels that are detrimental to the ecological services and agricultural production of wetland systems. In order to evaluate the positive and negative impacts of agricultural practice of using controlled drainage to manage ditch wetlands water quality in arid or semi-arid irrigation area, based on the principle of water-salt balance we constructed an analysis model. A ditch wetland as a case example in semi-arid irrigation area was then used to display model predictions of salinity variations over time under different watertable control depths. The ditch wetland area to farmland area ratio is 0.091, and the input sources of water and salt are not unique. The results showed that the model established by considering various inflows and outflows has higher simulation accuracy. The water stored in the wetland is key to affecting the salt concentration of the wetland, and the amount of water can be regulated by controlled drainage. Controlled drainage changes the hydrological process of farmland and ditch wetlands, reduces drainage output and damage by high concentrations of salt. But this management measure also increases the risk of medium salt concentrations that may cause an increase in salt output. Considering agricultural production and environmental protection of ditch wetlands, the drainage water table controlled at 1.2 m is a suitable drainage management measure in this irrigation area. The results provide the underlying insights needed to guide the design of drainage management practices in ditch wetlands that receive drainage discharge in semi-arid regions that can be sustained to the maximum benefit of the agricultural system and the environment.
英文关键词	Controlled drainage Ditch wetlands Water and salt balance Wetland ratio Inflow
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000625888400001
WOS关键词	SECONDARY SALINIZATION ; CONSTRUCTED WETLANDS ; PESTICIDE POLLUTION ; MANAGEMENT PRACTICE ; VEGETATION COVER ; RIVER-BASIN ; SALINITY ; GROUNDWATER ; HYDROLOGY ; REMOVAL
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351772
作者单位	[Li, Shan; Wu, Miao; Fei, Liangjun; Li, Jingsi] Xian Univ Technol, State Key Lab Ecohydraul Northwest Arid Reg, Xian, Peoples R China; [Jia, Zhonghua; Luo, Wan] Yangzhou Univ, Dept Agr & Water Resources Engn, Yangzhou, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, Shan,Wu, Miao,Jia, Zhonghua,et al. Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study[J],2021,208.
APA	Li, Shan,Wu, Miao,Jia, Zhonghua,Luo, Wan,Fei, Liangjun,&Li, Jingsi.(2021).Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study.SOIL & TILLAGE RESEARCH,208.
MLA	Li, Shan,et al."Influence of different controlled drainage strategies on the water and salt environment of ditch wetland: A model-based study".SOIL & TILLAGE RESEARCH 208(2021).