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Integration of HYDRUS-1D and MODFLOW for evaluating the dynamics of salts and nitrogen in groundwater under long-term reclaimed water irrigation
Lyu, Sidan1,2; Chen, Weiping2; Wen, Xuefa1; Chang, Andrew C.3
2019
Source PublicationIRRIGATION SCIENCE
ISSN0342-7188
Volume37Issue:1Pages:35-47
Corresponding AuthorChen, Weiping(wpchen@rcees.ac.cn)
AbstractReclaimed water has been extensively used as an alternative resource for irrigation, but can affect groundwater quality due to salt and nitrogen leaching. We conducted field investigations of a shallow groundwater monitoring well at the Research Center for Eco-Environmental Sciences, China, and irrigated sample sites of turf grass with reclaimed water for 8 years. The HYDRUS-1D and MODFLOW models were integrated to study the transport and distribution of electrical conductivity (ECgw) and nitrate-N (N-NO3-) in the shallow groundwater under long-term reclaimed water irrigation. Model calibration and validation showed that the integrated model could simulate the fates of ECgw and N-NO3- in the shallow groundwater. Field experiments and the model simulation showed that reclaimed water irrigation can increase salinity and N-NO3- concentration in shallow groundwater and predicted, assuming the continuation of current irrigation practices, that the annual average ECgw and N-NO3- would reach a steady level of 0.72dS m(-1) and 2.18 mg L-1, respectively. Because ECgw increased with increasing irrigation water salinity and amount, there is a risk of increased salinity in the shallow groundwater under long-term reclaimed water irrigation. Under all simulation scenarios, annual average N-NO3- concentrations in the shallow groundwater at an equilibrium state did not exceed the class II groundwater quality standard (2-5 mg L-1). After proper calibration and validation, the integration of HYDRUS-1D and MODFLOW models offers an effective tool for analyzing irrigation management of low-quality water in water-scarce regions.
DOI10.1007/s00271-018-0600-1
WOS KeywordMUNICIPAL WASTE-WATER ; NITRATE CONTAMINATION ; SHALLOW GROUNDWATER ; FRESH-WATER ; TRANSPORT ; MODEL ; REUSE ; LAND ; EVAPOTRANSPIRATION ; IMPACTS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41571130043]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaAgriculture ; Water Resources
WOS SubjectAgronomy ; Water Resources
WOS IDWOS:000454818800004
PublisherSPRINGER
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/51302
Collection中国科学院地理科学与资源研究所
Corresponding AuthorChen, Weiping
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
3.Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA
Recommended Citation
GB/T 7714
Lyu, Sidan,Chen, Weiping,Wen, Xuefa,et al. Integration of HYDRUS-1D and MODFLOW for evaluating the dynamics of salts and nitrogen in groundwater under long-term reclaimed water irrigation[J]. IRRIGATION SCIENCE,2019,37(1):35-47.
APA Lyu, Sidan,Chen, Weiping,Wen, Xuefa,&Chang, Andrew C..(2019).Integration of HYDRUS-1D and MODFLOW for evaluating the dynamics of salts and nitrogen in groundwater under long-term reclaimed water irrigation.IRRIGATION SCIENCE,37(1),35-47.
MLA Lyu, Sidan,et al."Integration of HYDRUS-1D and MODFLOW for evaluating the dynamics of salts and nitrogen in groundwater under long-term reclaimed water irrigation".IRRIGATION SCIENCE 37.1(2019):35-47.
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