Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions
Abstract The fate of nutrients and contaminants in fluvial ecosystems is strongly affected by the mixing dynamics between surface water and groundwater within the hyporheic zone, depending on the combination of the sediment's hydraulic heterogeneity and dune morphology. This study examines the...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Water Resources Research |
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| Online Access: | https://doi.org/10.1029/2023WR035625 |
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| author | Alessandra Marzadri Valentina Ciriello Felipe P. J. de Barros |
| author_facet | Alessandra Marzadri Valentina Ciriello Felipe P. J. de Barros |
| author_sort | Alessandra Marzadri |
| collection | DOAJ |
| description | Abstract The fate of nutrients and contaminants in fluvial ecosystems is strongly affected by the mixing dynamics between surface water and groundwater within the hyporheic zone, depending on the combination of the sediment's hydraulic heterogeneity and dune morphology. This study examines the effects of hydraulic conductivity stratification on steady‐state, two‐dimensional, hyporheic flows and solute residence time distribution. First, we derive an integral transform‐based semi‐analytical solution for the flow field, capable of accounting for the effects of any functional shape of the vertically varying hydraulic conductivity. The solution considers the uneven distribution of pressure at the water‐sediment interface (i.e., the pumping process) dictated by the presence of dune morphology. We then simulate solute transport using particle tracking. Our modeling framework is validated against numerical and tracer data from flume experiments and used to explore the implication of hydraulic conductivity stratification on the statistics and pdf of the residence time. Finally, reduced‐order models are used to enlighten the dependence of key residence time statistics on the parameters characterizing the hydraulic conductivity stratification. |
| format | Article |
| id | doaj-art-8151f6d7b5864eacb372d3d566b25426 |
| institution | Kabale University |
| issn | 0043-1397 1944-7973 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Water Resources Research |
| spelling | doaj-art-8151f6d7b5864eacb372d3d566b254262025-08-20T03:30:56ZengWileyWater Resources Research0043-13971944-79732024-01-01601n/an/a10.1029/2023WR035625Hyporheic Flows in Stratified Sediments: Implications on Residence Time DistributionsAlessandra Marzadri0Valentina Ciriello1Felipe P. J. de Barros2Department of Civil, Environmental and Mechanical Engineering University of Trento Trento ItalyDepartment of Civil, Chemical, Environmental and Materials Engineering University of Bologna Bologna ItalySonny Astani Department of Civil and Environmental Engineering University of Southern California Los Angeles CA USAAbstract The fate of nutrients and contaminants in fluvial ecosystems is strongly affected by the mixing dynamics between surface water and groundwater within the hyporheic zone, depending on the combination of the sediment's hydraulic heterogeneity and dune morphology. This study examines the effects of hydraulic conductivity stratification on steady‐state, two‐dimensional, hyporheic flows and solute residence time distribution. First, we derive an integral transform‐based semi‐analytical solution for the flow field, capable of accounting for the effects of any functional shape of the vertically varying hydraulic conductivity. The solution considers the uneven distribution of pressure at the water‐sediment interface (i.e., the pumping process) dictated by the presence of dune morphology. We then simulate solute transport using particle tracking. Our modeling framework is validated against numerical and tracer data from flume experiments and used to explore the implication of hydraulic conductivity stratification on the statistics and pdf of the residence time. Finally, reduced‐order models are used to enlighten the dependence of key residence time statistics on the parameters characterizing the hydraulic conductivity stratification.https://doi.org/10.1029/2023WR035625integral transformshyporheic zoneheterogeneityreduced order modelsresidence time distributionsensitivity analysis |
| spellingShingle | Alessandra Marzadri Valentina Ciriello Felipe P. J. de Barros Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions Water Resources Research integral transforms hyporheic zone heterogeneity reduced order models residence time distribution sensitivity analysis |
| title | Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions |
| title_full | Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions |
| title_fullStr | Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions |
| title_full_unstemmed | Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions |
| title_short | Hyporheic Flows in Stratified Sediments: Implications on Residence Time Distributions |
| title_sort | hyporheic flows in stratified sediments implications on residence time distributions |
| topic | integral transforms hyporheic zone heterogeneity reduced order models residence time distribution sensitivity analysis |
| url | https://doi.org/10.1029/2023WR035625 |
| work_keys_str_mv | AT alessandramarzadri hyporheicflowsinstratifiedsedimentsimplicationsonresidencetimedistributions AT valentinaciriello hyporheicflowsinstratifiedsedimentsimplicationsonresidencetimedistributions AT felipepjdebarros hyporheicflowsinstratifiedsedimentsimplicationsonresidencetimedistributions |