Influence of the In-Stream Structure on Solute Transport in the Hyporheic Zone

Han Li, Ying Liu, Jinghong Feng, Defu Liu, Yi Li, Lihui Chen and Jingwen Xiao
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Han Li: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China
Ying Liu: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China
Jinghong Feng: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China
Defu Liu: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China
Yi Li: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China
Lihui Chen: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China
Jingwen Xiao: Hubei Key Laboratory of Ecological Restoration of River-Lakes and Algal Utilization, Innovation Demonstration Base of Ecological Environment Geotechnical and Ecological Restoration of Rivers and Lakes, Hubei University of Technology, Wuhan 430068, China

IJERPH, 2022, vol. 19, issue 10, 1-18

Abstract: The hyporheic zone (HZ) plays an important role in the river ecosystem, and hyporheic exchange and solute transport in the HZ are important ecological functions. However, the relationship between the design parameters of river structure and solute transport is still poorly understood. In this study, we combined flume experiments and numerical simulations to systematically evaluate how in-stream structures impact the solute transport depth (D P ), hyporheic vertical exchange flux (Q), and solute flux (Qs). The results showed that the in-stream structure had a significant influence on solute transport in the HZ and could obviously increase the intensity of hyporheic exchange and promote solute transport. Model results indicated that D P , Q, and Qs increased with the ratio of ground height to underground height of structure ( H / D ) and structure number ( N ), while Q, D P , and Qs increased with the structural spacing ( S ) to begin with; then, Q remained constant, and D P and Qs decreased as S continued to increase. This study deepened our understanding of the influence of in-stream structural design parameters on HZ solute transport, which is helpful to provide a theoretical basis for ecological restoration projects in the river HZ.

Keywords: hyporheic zone; in-stream structures; solute transport; numerical modeling; hyporheic change (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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