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Designing a marine outfall to reduce microbial risk on a recreational beach: Field experiment and modeling

Title
Designing a marine outfall to reduce microbial risk on a recreational beach: Field experiment and modeling
Author
김영모
Keywords
Marine outfall; Antibiotic resistance genes; Fecal indicator bacteria; Coastal water quality; Environmental fluid dynamic code
Issue Date
2021-05
Publisher
ELSEVIER
Citation
JOURNAL OF HAZARDOUS MATERIALS, v. 409, article no. 124587, Page. 1-13
Abstract
A marine outfall can be a wastewater management system that discharges sewage and stormwater into the sea; hence, it is a source of microbial pollution on recreational beaches, including antibiotic resistant genes (ARGs), which lead to an increase in untreatable diseases. In this regard, a marine outfall must be efficiently located to mitigate these risks. This study aimed to 1) investigate the spatiotemporal variability of Escherichia coli (E. coli) and ARGs on a recreational beach and 2) design marine outfalls to reduce microbial risks. For this purpose, E. coli and ARGs with influential environmental variables were intensively monitored on Gwangalli beach, South Korea in this study. Environmental fluid dynamic code (EFDC) was used and calibrated using the monitoring data, and 12 outfall extension scenarios were explored (6 locations at 2 depths). The results revealed that repositioning the marine outfall can significantly reduce the concentrations of E. coli and ARGs on the beach by 46-99%. Offshore extended outfalls at the bottom of the sea reduced concentrations of E. coli and ARGs on the beach more effectively than onshore outfalls at the sea surface. These findings could be helpful in establishing microbial pollution management plans at recreational beaches in the future.
URI
https://www.sciencedirect.com/science/article/pii/S0304389420325772?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/176765
ISSN
0304-3894;1873-3336
DOI
10.1016/j.jhazmat.2020.124587
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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