Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water
BACKGROUND AND OBJECTIVES: It is important to develop dynamic water quality index software that reflected accurately the state of enclosed coastal water quality. This study explored water quality index model software including the third-order and daily based discrete-time transfer function in Simuli...
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GJESM Publisher
2021-04-01
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| Series: | Global Journal of Environmental Science and Management |
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| Online Access: | https://www.gjesm.net/article_47892_b25331c93532bd4aa7eebe2e03a0f0d1.pdf |
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| author | H. Hapoğlu Ş. Camcıoğlu B. Özyurt P. Yildirim L. Balas |
| author_facet | H. Hapoğlu Ş. Camcıoğlu B. Özyurt P. Yildirim L. Balas |
| author_sort | H. Hapoğlu |
| collection | DOAJ |
| description | BACKGROUND AND OBJECTIVES: It is important to develop dynamic water quality index software that reflected accurately the state of enclosed coastal water quality. This study explored water quality index model software including the third-order and daily based discrete-time transfer function in Simulink-MATLAB environment to predict the past and future water quality index changes versus discrete-time by using the data measured approximately once a month. METHODS: A modelling software for daily based discrete-time water quality index was developed to evaluate the pollution level in enclosed coastal water bodies affected by marinas. Measurements were done at three different stations near marina entrances in Bucak, Kaş, and Fethiye Bays located at the south western Mediterranean coast of Turkey. The computed water quality index values and the sampled indicators data defined in terms of the deviation variables were used to identify the proposed third-order transfer function parameters. The proposed software is applicable for past and future estimates, where inputs may include some missing measurements. The input data are interpolated to estimate daily based inputs by using the developed model in the Simulink-MATLAB environment. For model verifications, monthly measured water quality parameters are used. FINDINGS: The software including the daily based discrete-time transfer function and the input sources was successfully applied to predict past and future water quality index changes with 4.2 percent, 4.3 percent, and 7.1 percent of the absolute maximum errors respectively in Fethiye, Kaş, and Bucak stations. In three stations studied, seasonal comparison of the enclosed coastal water quality showed that the quality in winter (72±2) is lower than the one (82±8) in other seasons. The past and future daily predictions of water quality index changes versus discrete-time were realized successfully by using the proposed software and the data measured approximately once a month. CONCLUSION: By determining similar transfer functions and selecting some adequate indicators, the software proposed can be adapted for quality assessment in other enclosed water bodies. |
| format | Article |
| id | doaj-art-d85e5ff840264eafa6d42a46de0e08ea |
| institution | Kabale University |
| issn | 2383-3572 2383-3866 |
| language | English |
| publishDate | 2021-04-01 |
| publisher | GJESM Publisher |
| record_format | Article |
| series | Global Journal of Environmental Science and Management |
| spelling | doaj-art-d85e5ff840264eafa6d42a46de0e08ea2025-02-02T23:02:40ZengGJESM PublisherGlobal Journal of Environmental Science and Management2383-35722383-38662021-04-017219721010.22034/gjesm.2021.02.0447892Dıscrete-tıme dynamıc water qualıty ındex model ın coastal waterH. Hapoğlu0Ş. Camcıoğlu1B. Özyurt2P. Yildirim3L. Balas4Ankara University, Engineering Faculty, Chemical Engineering Department, 06100 Tandoğan, Ankara, TurkeyAnkara University, Engineering Faculty, Chemical Engineering Department, 06100 Tandoğan, Ankara, TurkeyAnkara University, Engineering Faculty, Chemical Engineering Department, 06100 Tandoğan, Ankara, TurkeyGazi University, Sea and Aquatic Sciences Application and Research Center, 06570 Maltepe, Ankara, TurkeyGazi University, Sea and Aquatic Sciences Application and Research Center, 06570 Maltepe, Ankara, TurkeyBACKGROUND AND OBJECTIVES: It is important to develop dynamic water quality index software that reflected accurately the state of enclosed coastal water quality. This study explored water quality index model software including the third-order and daily based discrete-time transfer function in Simulink-MATLAB environment to predict the past and future water quality index changes versus discrete-time by using the data measured approximately once a month. METHODS: A modelling software for daily based discrete-time water quality index was developed to evaluate the pollution level in enclosed coastal water bodies affected by marinas. Measurements were done at three different stations near marina entrances in Bucak, Kaş, and Fethiye Bays located at the south western Mediterranean coast of Turkey. The computed water quality index values and the sampled indicators data defined in terms of the deviation variables were used to identify the proposed third-order transfer function parameters. The proposed software is applicable for past and future estimates, where inputs may include some missing measurements. The input data are interpolated to estimate daily based inputs by using the developed model in the Simulink-MATLAB environment. For model verifications, monthly measured water quality parameters are used. FINDINGS: The software including the daily based discrete-time transfer function and the input sources was successfully applied to predict past and future water quality index changes with 4.2 percent, 4.3 percent, and 7.1 percent of the absolute maximum errors respectively in Fethiye, Kaş, and Bucak stations. In three stations studied, seasonal comparison of the enclosed coastal water quality showed that the quality in winter (72±2) is lower than the one (82±8) in other seasons. The past and future daily predictions of water quality index changes versus discrete-time were realized successfully by using the proposed software and the data measured approximately once a month. CONCLUSION: By determining similar transfer functions and selecting some adequate indicators, the software proposed can be adapted for quality assessment in other enclosed water bodies.https://www.gjesm.net/article_47892_b25331c93532bd4aa7eebe2e03a0f0d1.pdfmediterranean coastparametersquality assessmenttransfer functionwater quality index (wqi) |
| spellingShingle | H. Hapoğlu Ş. Camcıoğlu B. Özyurt P. Yildirim L. Balas Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water Global Journal of Environmental Science and Management mediterranean coast parameters quality assessment transfer function water quality index (wqi) |
| title | Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water |
| title_full | Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water |
| title_fullStr | Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water |
| title_full_unstemmed | Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water |
| title_short | Dıscrete-tıme dynamıc water qualıty ındex model ın coastal water |
| title_sort | discrete time dynamic water quality index model in coastal water |
| topic | mediterranean coast parameters quality assessment transfer function water quality index (wqi) |
| url | https://www.gjesm.net/article_47892_b25331c93532bd4aa7eebe2e03a0f0d1.pdf |
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