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Influences of riverbed morphology on patterns and magnitudes of hyporheic water exchange within a natural river confluence
Cheng, Dandong1,2,3; Song, Jinxi1,2,4; Wang, Weize5,6; Zhang, Guotao3,7
Corresponding AuthorSong, Jinxi(jinxisong@nwu.edu.cn)
2019-07-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume574Pages:75-84
AbstractRiver confluences are pivotal junctions that have vital influences on hydraulic characteristics and sediment particle distributions as well as on hyporheic water exchange. However, hyporheic water exchange is poorly understood because of the complicated river morphology within a river confluence. Therefore, the river confluence between the Juehe River and Haohe River located in arid and semi-arid areas of northwestern China was selected to evaluate the hyporheic water exchange processes, and the temperatures of different depth sediment were measured on July 11th and 12th, 2016 by an instrument equipped with five temperature sensors. The patterns and magnitudes of hyporheic water exchange were estimated using a one-dimensional heat transport model coupled with temperature data. Meanwhile, terrain points elevations and sediment particle distributions in this river confluence were collected to determine the confluence riverbed morphology. Furthermore, the river confluence morphology effects on hyporheic water exchange were investigated in this study. The different riverbed morphology and hydrodynamic zone locations were observed, which were controlled by the planform geometry with low river confluence flux momentum during the test period. Meanwhile, the upwelling flow dominated in the test area, and the downwelling occurred at three of the 23 total test points, which was induced by the complicated riverbed morphology and hydraulic characteristics. Additionally, the magnitudes of the upwelling flow were significantly influenced by the sediment heterogeneity subjected to the erosional and depositional processes. Hyporheic water exchange is a vital hydrological process in arid and semi-arid areas, where it significantly impacts the ecological environment of rivers. This study provides a valuable guideline for water quality and quantity management in arid and semi-arid areas.
KeywordRiver confluence Morphology Hydraulic characteristics Sedimentary properties Hyporheic water exchange
DOI10.1016/j.jhydrol.2019.04.025
Indexed BySCI
WOS KeywordSURFACE-WATER ; HYDRAULIC CONDUCTIVITY ; STREAMBED TOPOGRAPHY ; GROUNDWATER ; TEMPERATURE ; ZONE ; FLUXES ; FLOW ; HETEROGENEITY ; INTERFACE
Language英语
Funding ProjectNational Natural Science Foundation of China[51679200] ; National Natural Science Foundation of China[51379175] ; Hundred Talents Project of the Chinese Academy of Sciences[A315021406] ; Program for Key Science and Technology Innovation Team in Shaanxi Province[2014KCT-27]
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000476962800008
Funding OrganizationNational Natural Science Foundation of China ; Hundred Talents Project of the Chinese Academy of Sciences ; Program for Key Science and Technology Innovation Team in Shaanxi Province
PublisherELSEVIER
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26778
Collection中国科学院水利部成都山地灾害与环境研究所
Corresponding AuthorSong, Jinxi
Affiliation1.Chinese Acad Sci, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Northwest Univ, Coll Urban & Environm Sci, Shaanxi Key Lab Earth Surface Syst & Environm Car, Xian 710127, Shaanxi, Peoples R China
5.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China
6.Tsinghua Univ, Dept Hydraul Engn, Beijing 100084, Peoples R China
7.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China
Recommended Citation
GB/T 7714
Cheng, Dandong,Song, Jinxi,Wang, Weize,et al. Influences of riverbed morphology on patterns and magnitudes of hyporheic water exchange within a natural river confluence[J]. JOURNAL OF HYDROLOGY,2019,574:75-84.
APA Cheng, Dandong,Song, Jinxi,Wang, Weize,&Zhang, Guotao.(2019).Influences of riverbed morphology on patterns and magnitudes of hyporheic water exchange within a natural river confluence.JOURNAL OF HYDROLOGY,574,75-84.
MLA Cheng, Dandong,et al."Influences of riverbed morphology on patterns and magnitudes of hyporheic water exchange within a natural river confluence".JOURNAL OF HYDROLOGY 574(2019):75-84.
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