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Appraisal of stormwater-induced runoff quality influenced by site-specific land use patterns in the south-eastern region of Bangladesh

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Abstract

Urban stormwater runoff is considered as one of the major contributors to nonpoint source that contributes to the pollution of all water resources in the surrounding environment. Pollutant concentrations of urban stormwater runoff are directly or indirectly linked with land use types in a catchment that is quite different in different places, and hence, site-specific studies are necessary, unless otherwise the modelling of runoff quality using modelling tools may not be rationally reflected the actual field scenarios. This paper portrays the influence of land use types on stormwater runoff physicochemical quality in Chattogram city, where land use’s demarcation is often complicated due to the different natural and human-induced anthropogenic factors. The stormwater runoff samples were collected from the residential, commercial, institutional, and industrial land use types, in the city of Chattogram, Bangladesh, during the period from July to September 2020. The standard laboratory protocol for elemental concentrations and principal component analysis was performed in addition to basic statistics to identify the influence of urban surface characteristics on the quality of stormwater runoff. In general, pollutant concentrations were identified by analysing key physical and chemical quality parameters including colour, temperature, turbidity, total suspended solids (TSS), total dissolved solids (TDS), electrical conductivity (EC), salinity, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD5), chemical oxygen demand (COD) and ammonia nitrogen (NH3-N) and exhibited 2 to 3 times higher concentrations than reported elsewhere. Furthermore, the present study reported the greater concentrations of few pollutants, such as TSS, BOD5, and EC, derived from the residential land uses compared to other land use types that are surprising; however, it confirmed the distinct complexity of unplanned land use patterns that should not be overlooked rather discussed. The strong correlation between land use types and stormwater runoff quality indicates the site-specific influences of runoff quality. The outcomes of this study would be particularly helpful in calibrating water quality models considering different land use types. Additionally, datasets and information obtained from this research will assist engineers and practitioners in developing decision-making tools for effective stormwater management.

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Acknowledgements

The research work was funded by the Directorate of Research and Extension (DRE), Chittagong University of Engineering (CUET). The technical support offered by Port City International University (PCIU) as well as CUET in conducting this study is gratefully acknowledged.

Funding

The research work was partially funded by the Directorate of Research and Extension (DRE) at Chittagong University of Engineering (CUET).

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Authors

Contributions

M. H. Masum (PG student and research lecturer): conceptualization, formal analysis, investigation, methodology and writing — original draft.

Dr. S. K. Pal (professor): conceptualization, methodology, project administration, supervision, validation, writing — review and editing

Dr. M. Salauddin (assistant professor): conceptualization, methodology, validation, writing—original draft, writing — review and editing

M. A. Hossen (assistant professor): conceptualization, writing — review and editing

I.J. Ruva (lecturer): conceptualization, methodology, data collection, writing — review and editing.

A.A. Akhie (PG student): conceptualization, writing — review and editing.

All the authors agreed and approved the final version of the manuscript.

Corresponding author

Correspondence to Sudip Kumar Pal.

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All the authors have their consent to publish the content, and as appropriate, copyright transfer and/or agreement of publishing manuscript will be provided in due course. All the authors agreed and approved the final version of the manuscript.

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The authors declare no competing interests.

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Responsible Editor: Xianliang Yi

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Pal, S.K., Masum, M.M.H., Salauddin, M. et al. Appraisal of stormwater-induced runoff quality influenced by site-specific land use patterns in the south-eastern region of Bangladesh. Environ Sci Pollut Res 30, 36112–36126 (2023). https://doi.org/10.1007/s11356-022-24806-8

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  • DOI: https://doi.org/10.1007/s11356-022-24806-8

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