Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway
Study region: The Ara Waterway, an artificial inland brackish waterway in South Korea. Study focus: This study investigates how water residence time and stratification affect water quality in an artificial brackish water system, which has different characteristics from natural environments and is un...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-02-01
|
| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581824004403 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832591825608638464 |
|---|---|
| author | Bo-Kyung Kim Dong Hyeon Kim Jin Hwan Hwang |
| author_facet | Bo-Kyung Kim Dong Hyeon Kim Jin Hwan Hwang |
| author_sort | Bo-Kyung Kim |
| collection | DOAJ |
| description | Study region: The Ara Waterway, an artificial inland brackish waterway in South Korea. Study focus: This study investigates how water residence time and stratification affect water quality in an artificial brackish water system, which has different characteristics from natural environments and is under-researched, using numerical simulations. Various hydrodynamic conditions, including freshwater discharge and travel distances, were analyzed to understand their impact on residence times and stratification, offering insights for optimizing water quality management. New hydrological insights for the region: This study demonstrates that stratification significantly impacts water quality more than residence time in artificial brackish waterways. In contrast to lakes or reservoirs, increasing freshwater discharge in artificial brackish waterways can enhance stratification, reducing vertical mixing and degrading water quality, especially in the bottom layers. In the F0 scenario, excluding freshwater inflow increased summer maximum dissolved oxygen by 1.37 times compared to the validation case. This suggests that breaking stratification, such as through underwater aeration systems, may be more effective than focusing on residence time. In the L15 scenario, with the longest travel distance, upstream total nitrogen and total phosphorus increased by 18.37 % and 26.12 %, while downstream levels decreased by 3.35 % and 10.52 %. Additionally, poorer quality freshwater can degrade overall water quality, even with shorter residence times. These findings emphasize the need for careful management of inflowing water to maintain water quality in artificial brackish waterways. |
| format | Article |
| id | doaj-art-2417a6a713f045d59ad850928722a1f8 |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-2417a6a713f045d59ad850928722a1f82025-01-22T05:41:58ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102091Impact of water residence time and stratification on water quality improvement of an artificial brackish waterwayBo-Kyung Kim0Dong Hyeon Kim1Jin Hwan Hwang2Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaInstitute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of KoreaDepartment of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Institute of Construction and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea; Corresponding author at: Department of Civil and Environmental Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.Study region: The Ara Waterway, an artificial inland brackish waterway in South Korea. Study focus: This study investigates how water residence time and stratification affect water quality in an artificial brackish water system, which has different characteristics from natural environments and is under-researched, using numerical simulations. Various hydrodynamic conditions, including freshwater discharge and travel distances, were analyzed to understand their impact on residence times and stratification, offering insights for optimizing water quality management. New hydrological insights for the region: This study demonstrates that stratification significantly impacts water quality more than residence time in artificial brackish waterways. In contrast to lakes or reservoirs, increasing freshwater discharge in artificial brackish waterways can enhance stratification, reducing vertical mixing and degrading water quality, especially in the bottom layers. In the F0 scenario, excluding freshwater inflow increased summer maximum dissolved oxygen by 1.37 times compared to the validation case. This suggests that breaking stratification, such as through underwater aeration systems, may be more effective than focusing on residence time. In the L15 scenario, with the longest travel distance, upstream total nitrogen and total phosphorus increased by 18.37 % and 26.12 %, while downstream levels decreased by 3.35 % and 10.52 %. Additionally, poorer quality freshwater can degrade overall water quality, even with shorter residence times. These findings emphasize the need for careful management of inflowing water to maintain water quality in artificial brackish waterways.http://www.sciencedirect.com/science/article/pii/S2214581824004403Artificial brackish waterwayResidence timeStratificationWater quality modeling |
| spellingShingle | Bo-Kyung Kim Dong Hyeon Kim Jin Hwan Hwang Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway Journal of Hydrology: Regional Studies Artificial brackish waterway Residence time Stratification Water quality modeling |
| title | Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway |
| title_full | Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway |
| title_fullStr | Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway |
| title_full_unstemmed | Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway |
| title_short | Impact of water residence time and stratification on water quality improvement of an artificial brackish waterway |
| title_sort | impact of water residence time and stratification on water quality improvement of an artificial brackish waterway |
| topic | Artificial brackish waterway Residence time Stratification Water quality modeling |
| url | http://www.sciencedirect.com/science/article/pii/S2214581824004403 |
| work_keys_str_mv | AT bokyungkim impactofwaterresidencetimeandstratificationonwaterqualityimprovementofanartificialbrackishwaterway AT donghyeonkim impactofwaterresidencetimeandstratificationonwaterqualityimprovementofanartificialbrackishwaterway AT jinhwanhwang impactofwaterresidencetimeandstratificationonwaterqualityimprovementofanartificialbrackishwaterway |