Bayesian model-based approach for developing a river water quality index
Six main pollutants have been previously identified by expert opinion to determine river condition in Malaysia. The pollutants were Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Suspended Solid (SS), potential of Hydrogen (pH) and Ammonia (AN). The selected va...
| Main Authors: | , , , , |
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| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
AIP Publishing LLC
2013
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| Online Access: | http://psasir.upm.edu.my/id/eprint/57244/ http://psasir.upm.edu.my/id/eprint/57244/1/Bayesian%20model-based%20approach%20for%20developing%20a%20river%20water%20quality%20index.pdf |
| _version_ | 1848853311351947264 |
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| author | Mohd Ali, Zalina Ibrahim, Noor Akma Mengersen, Kerrie Shitan, Mahendran Juahir, Hafizan |
| author_facet | Mohd Ali, Zalina Ibrahim, Noor Akma Mengersen, Kerrie Shitan, Mahendran Juahir, Hafizan |
| author_sort | Mohd Ali, Zalina |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Six main pollutants have been previously identified by expert opinion to determine river condition in Malaysia. The pollutants were Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Suspended Solid (SS), potential of Hydrogen (pH) and Ammonia (AN). The selected variables together with the respective weights have been applied to calculate the water quality index of all rivers in Malaysia. However, the relative weights established in DOE-WQI formula are subjective in nature and not unanimously agreed upon, as indicated by different weight being proposed for the same variables by various panels of experts. Focusing on the Langat River, a Bayesian model-based approach was introduced for the first time in this study to obtain new objective relative weights. The new weights used in WQI calculation are shown to be capable of capturing similar distributions in water quality compared with the existing DOE-WQI. |
| first_indexed | 2025-11-15T10:51:57Z |
| format | Conference or Workshop Item |
| id | upm-57244 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T10:51:57Z |
| publishDate | 2013 |
| publisher | AIP Publishing LLC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-572442017-09-26T03:48:40Z http://psasir.upm.edu.my/id/eprint/57244/ Bayesian model-based approach for developing a river water quality index Mohd Ali, Zalina Ibrahim, Noor Akma Mengersen, Kerrie Shitan, Mahendran Juahir, Hafizan Six main pollutants have been previously identified by expert opinion to determine river condition in Malaysia. The pollutants were Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Suspended Solid (SS), potential of Hydrogen (pH) and Ammonia (AN). The selected variables together with the respective weights have been applied to calculate the water quality index of all rivers in Malaysia. However, the relative weights established in DOE-WQI formula are subjective in nature and not unanimously agreed upon, as indicated by different weight being proposed for the same variables by various panels of experts. Focusing on the Langat River, a Bayesian model-based approach was introduced for the first time in this study to obtain new objective relative weights. The new weights used in WQI calculation are shown to be capable of capturing similar distributions in water quality compared with the existing DOE-WQI. AIP Publishing LLC 2013 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/57244/1/Bayesian%20model-based%20approach%20for%20developing%20a%20river%20water%20quality%20index.pdf Mohd Ali, Zalina and Ibrahim, Noor Akma and Mengersen, Kerrie and Shitan, Mahendran and Juahir, Hafizan (2013) Bayesian model-based approach for developing a river water quality index. In: Statistics and Operational Research International Conference (SORIC 2013), 3–5 Dec. 2013, Sarawak, Malaysia. (pp. 45-54). 10.1063/1.4894330 |
| spellingShingle | Mohd Ali, Zalina Ibrahim, Noor Akma Mengersen, Kerrie Shitan, Mahendran Juahir, Hafizan Bayesian model-based approach for developing a river water quality index |
| title | Bayesian model-based approach for developing a river water quality index |
| title_full | Bayesian model-based approach for developing a river water quality index |
| title_fullStr | Bayesian model-based approach for developing a river water quality index |
| title_full_unstemmed | Bayesian model-based approach for developing a river water quality index |
| title_short | Bayesian model-based approach for developing a river water quality index |
| title_sort | bayesian model-based approach for developing a river water quality index |
| url | http://psasir.upm.edu.my/id/eprint/57244/ http://psasir.upm.edu.my/id/eprint/57244/ http://psasir.upm.edu.my/id/eprint/57244/1/Bayesian%20model-based%20approach%20for%20developing%20a%20river%20water%20quality%20index.pdf |