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Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/hess-2017-654
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-2017-654
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 01 Dec 2017

Research article | 01 Dec 2017

Review status
This discussion paper is a preprint. It has been under review for the journal Hydrology and Earth System Sciences (HESS). The manuscript was not accepted for further review after discussion.

Research on Hydrogeochemical Characteristics and Transformation Relationships between Surface Water and Groundwater in the Weihe River

Jihong Qu1, Shibao Lu2, Zhipeng Gao3,1, Wujin Li4,1, Zhiping Li1, and Furong Yu1 Jihong Qu et al.
  • 1School of Resources and Environment, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
  • 2School of Public Administration, Zhejiang University of Finance and Economics, Hang Zhou 310018, China
  • 3School of Water Resources and Environment, China University of Geosciences (Beijing), Beijing 100083, China
  • 4Guangdong Hydropower Planning and Design Institute, Guangzhou 510635, China

Abstract. The transforming relationship between surface water and groundwater as well as their origins are the basis for studying the transport of pollutants in river-groundwater systems. A typical section of the river was chosen to sample the surface water and shallow groundwater. Then, a Piper trilinear diagram, Gibbs diagram, ratios of major ions, factor analysis, cluster analysis and other methods were used to investigate the hydrogeochemical evolution of surface water and groundwater and determine the formation of hydrogeochemical components in different water bodies. Based on the distribution characteristics of hydrogen and oxygen stable isotopes δD and δ18O and discharge hydrograph separation methods, the relationship between surface water and groundwater in the Weihe River was analyzed. The results indicated that the river water is a SO4·Cl—Na type and that the groundwater hydrogeochemical types are not the same. The dominant anions are HCO3 in the upstream reaches and are SO42− and Cl in downstream reaches. Hydrogeochemical processes include evaporation and concentration, weathering of rocks, ion exchange, and dissolution infiltration reactions. The δD and δ18O of surface water change little along the river and are more enriched than are those of the groundwater. With the influences of precipitation, irrigation, river recharge and evaporation, the δD and δ18O of shallow groundwater at different sections are not the same. There is a close relationship between the surface water and groundwater. Surface water supplies the groundwater, which provides the hydrodynamic conditions for the entry of pollutants into the aquifer.

Jihong Qu et al.
Jihong Qu et al.
Jihong Qu et al.
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Based on the distribution characteristics of hydrogen and oxygen stable isotopes δD and δ18O and discharge hydrograph separation methods, the relationship between surface water and groundwater in the Weihe River. The results indicated tha hydrogeochemical processes include evaporation and concentration, weathering of rocks, ion exchange, and dissolution infiltration reactions. The δD and δ18O of surface water change little along the river and are more enriched than are those of the groundwater.
Based on the distribution characteristics of hydrogen and oxygen stable isotopes δD and δ18O...
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