An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling
The hyporheic zone is a transition zone for the exchange of matter and energy between surface water and subsurface water. The study of trends and sensitivities of bed hyporheic exchanges to the various influencing factors is of great significance. The surface−groundwater flow process was s...
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doaj-15027a10933a4e0989be20120d201eb02020-11-24T20:53:59ZengMDPI AGWater2073-44412019-03-0111466510.3390/w11040665w11040665An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical ModelingJie Ren0Xiuping Wang1Yinjun Zhou2Bo Chen3Lili Men4State Key Laboratory of Eco−hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco−hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaChangjiang River Scientific Research Institute, Wuhan 430010, ChinaState Key Laboratory of Eco−hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco−hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaThe hyporheic zone is a transition zone for the exchange of matter and energy between surface water and subsurface water. The study of trends and sensitivities of bed hyporheic exchanges to the various influencing factors is of great significance. The surface−groundwater flow process was simulated using a multiphysics computational fluid dynamics (CFD) method and compared to previous flume experiments. Based on that, the single-factor effects of flow velocity (<i>u</i>), water depth (<i>H</i>), dune wave height (<i>h</i>), and bed substrate permeability (<i>κ</i>) on hyporheic exchange in the bed hyporheic zone were investigated. The sensitivity analysis of various factors (<i>H</i>, <i>u</i>, dune wavelength (<i>L</i>), <i>h</i>, bed substrate porosity (<i>θ</i>), <i>κ</i>, and the diffusion coefficient of solute molecules (<i>D</i><sub>m</sub>)) in the surface−subsurface water coupling model was done using orthogonal tests. The results indicated that <i>u</i>, <i>h</i>, and <i>κ</i> were positively related, whereas <i>H</i> was negatively related to hyporheic exchange. <i>H</i> and <i>u</i> showed large effects, whereas <i>κ</i>, <i>D</i><sub>m</sub>, and <i>θ</i> had moderate effects, and <i>L</i> and <i>h</i> showed small effects on hyporheic exchange. This study provides valuable references for the protection and recovery of river ecology.https://www.mdpi.com/2073-4441/11/4/665hyporheic exchangesurface−groundwater flow processinfluencing factorsorthogonal testssensitivity analysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jie Ren Xiuping Wang Yinjun Zhou Bo Chen Lili Men |
spellingShingle |
Jie Ren Xiuping Wang Yinjun Zhou Bo Chen Lili Men An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling Water hyporheic exchange surface−groundwater flow process influencing factors orthogonal tests sensitivity analysis |
author_facet |
Jie Ren Xiuping Wang Yinjun Zhou Bo Chen Lili Men |
author_sort |
Jie Ren |
title |
An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling |
title_short |
An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling |
title_full |
An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling |
title_fullStr |
An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling |
title_full_unstemmed |
An Analysis of the Factors Affecting Hyporheic Exchange based on Numerical Modeling |
title_sort |
analysis of the factors affecting hyporheic exchange based on numerical modeling |
publisher |
MDPI AG |
series |
Water |
issn |
2073-4441 |
publishDate |
2019-03-01 |
description |
The hyporheic zone is a transition zone for the exchange of matter and energy between surface water and subsurface water. The study of trends and sensitivities of bed hyporheic exchanges to the various influencing factors is of great significance. The surface−groundwater flow process was simulated using a multiphysics computational fluid dynamics (CFD) method and compared to previous flume experiments. Based on that, the single-factor effects of flow velocity (<i>u</i>), water depth (<i>H</i>), dune wave height (<i>h</i>), and bed substrate permeability (<i>κ</i>) on hyporheic exchange in the bed hyporheic zone were investigated. The sensitivity analysis of various factors (<i>H</i>, <i>u</i>, dune wavelength (<i>L</i>), <i>h</i>, bed substrate porosity (<i>θ</i>), <i>κ</i>, and the diffusion coefficient of solute molecules (<i>D</i><sub>m</sub>)) in the surface−subsurface water coupling model was done using orthogonal tests. The results indicated that <i>u</i>, <i>h</i>, and <i>κ</i> were positively related, whereas <i>H</i> was negatively related to hyporheic exchange. <i>H</i> and <i>u</i> showed large effects, whereas <i>κ</i>, <i>D</i><sub>m</sub>, and <i>θ</i> had moderate effects, and <i>L</i> and <i>h</i> showed small effects on hyporheic exchange. This study provides valuable references for the protection and recovery of river ecology. |
topic |
hyporheic exchange surface−groundwater flow process influencing factors orthogonal tests sensitivity analysis |
url |
https://www.mdpi.com/2073-4441/11/4/665 |
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