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Analysis of water source contribution and its impact on hydrological structural connectivity in urban plain river network area based on stable isotopes
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  • Shuiling Zhang,
  • Jiuhe Bu,
  • Chunhui Li,
  • Xu Xiangen,
  • Xuan Wang,
  • Qiang Liu
Shuiling Zhang
Beijing Normal University School of Environment

Corresponding Author:[email protected]

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Jiuhe Bu
Wuxi University Wuxi 210044 China
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Chunhui Li
Beijing Normal University School of Environment
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Xu Xiangen
Changzhou Research Academy of Environmental Science Changzhou 213022 China
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Xuan Wang
Beijing Normal University School of Environment
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Qiang Liu
Beijing Normal University School of Environment
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Abstract

Water sources carry chemicals that can have a significant impact on the water environment of a river network, and understanding the contribution of different water sources to the river network can help to manage the pollution of the river network at its source. Hydrological connectivity of a river network affects the self-purification capacity and flood prevention capacity of the river. Thus an isotope tracer approach was applied to figure out the contribution rate of different water bodies to a river network and hydrological connectivity was quantified by introducing retention rate. Changzhou city was selected as the study area because it is an urbanized city with the characteristics of plain river network and it is faced with poor hydrological connectivity due to artificial constructions (dams and pumps) and human activity (urbanization). River water, well water (shallow groundwater), lake water and rainfall were collected during the flood season and nonflood season, and hydrogen and oxygen isotopes were determined. The temporal and spatial variations in hydrogen and oxygen isotopes in different water bodies and the state of the water cycle in different water bodies were analyzed. IsoSource and MixSIAR models were established to analyze the contribution rate of river network water sources in the study area, and their effectiveness was compared. Results of MixSIAR model were selected to evaluate the hydrological connectivity of the river network in the study area, providing a method to quantify the hydrological connectivity of specific river of the river network in Changzhou. This method could also be applied to other urban plain river network area to study its river connectivity.
29 Sep 2022Submitted to Hydrological Processes
11 Oct 2022Submission Checks Completed
11 Oct 2022Assigned to Editor
11 Oct 2022Reviewer(s) Assigned
24 Oct 2022Review(s) Completed, Editorial Evaluation Pending
07 Nov 2022Editorial Decision: Revise Major
21 Nov 20221st Revision Received
22 Nov 2022Submission Checks Completed
22 Nov 2022Assigned to Editor
22 Nov 2022Reviewer(s) Assigned
22 Nov 2022Reviewer(s) Assigned
25 Nov 2022Review(s) Completed, Editorial Evaluation Pending
25 Nov 2022Editorial Decision: Revise Major
05 Dec 20222nd Revision Received
05 Dec 2022Submission Checks Completed
05 Dec 2022Assigned to Editor
05 Dec 2022Reviewer(s) Assigned
09 Dec 2022Review(s) Completed, Editorial Evaluation Pending
09 Dec 2022Editorial Decision: Accept