Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia
The present study investigates the trend in long term monthly streamflow of Sungai Lui (upstream) and Sungai Kajang (middle-stream) of the Sungai Langat Basin located in Selangor, Malaysia. The Mann-Kendall (MK) and Innovative Trend Method (ITM) tests were utilized to assess the trends at the tw...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Penerbit Universiti Kebangsaan Malaysia
2021
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| Online Access: | http://journalarticle.ukm.my/16904/1/6.pdf |
| _version_ | 1796932553925459968 |
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| author | Siti Hawa Mohd Yusoff, Firdaus Mohamad Hamzah, Othman Jaafar, Hazrina Tajudin, |
| author_facet | Siti Hawa Mohd Yusoff, Firdaus Mohamad Hamzah, Othman Jaafar, Hazrina Tajudin, |
| author_sort | Siti Hawa Mohd Yusoff, |
| collection | UKM |
| description | The present study investigates the trend in long term monthly streamflow of Sungai Lui (upstream) and Sungai Kajang
(middle-stream) of the Sungai Langat Basin located in Selangor, Malaysia. The Mann-Kendall (MK) and Innovative
Trend Method (ITM) tests were utilized to assess the trends at the two stations. The trend free pre-whitening (TFPW) and
variance correction (VC) tests were used to assess the effects of serial correlation on the established trend, and Sen’s slope
estimator was used to assess the magnitude of streamflow. Based on Sen’s Slope estimator results, the trend magnitude
for Lui station is very small compared to the Kajang station. The Kajang station shows the highest increase in trend
magnitude for November. The results of TFPW and VC trend tests showed that the most significant increasing trend of
months occurred at Kajang station, while the less increasing significant trend of months occurred at Lui station. It can
be concluded that similar trend results were obtained when the modified Mann-Kendall and ITM were applied to the
same data for Sungai Lui and Sungai Kajang. The study found that there is a significant difference in terms of trend and
magnitud between upstream and middle-stream. |
| first_indexed | 2024-03-06T04:34:13Z |
| format | Article |
| id | ukm.eprints-16904 |
| institution | Universiti Kebangsaan Malaysia |
| language | English |
| last_indexed | 2024-03-06T04:34:13Z |
| publishDate | 2021 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| record_format | dspace |
| spelling | ukm.eprints-169042021-06-28T08:41:32Z http://journalarticle.ukm.my/16904/ Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia Siti Hawa Mohd Yusoff, Firdaus Mohamad Hamzah, Othman Jaafar, Hazrina Tajudin, The present study investigates the trend in long term monthly streamflow of Sungai Lui (upstream) and Sungai Kajang (middle-stream) of the Sungai Langat Basin located in Selangor, Malaysia. The Mann-Kendall (MK) and Innovative Trend Method (ITM) tests were utilized to assess the trends at the two stations. The trend free pre-whitening (TFPW) and variance correction (VC) tests were used to assess the effects of serial correlation on the established trend, and Sen’s slope estimator was used to assess the magnitude of streamflow. Based on Sen’s Slope estimator results, the trend magnitude for Lui station is very small compared to the Kajang station. The Kajang station shows the highest increase in trend magnitude for November. The results of TFPW and VC trend tests showed that the most significant increasing trend of months occurred at Kajang station, while the less increasing significant trend of months occurred at Lui station. It can be concluded that similar trend results were obtained when the modified Mann-Kendall and ITM were applied to the same data for Sungai Lui and Sungai Kajang. The study found that there is a significant difference in terms of trend and magnitud between upstream and middle-stream. Penerbit Universiti Kebangsaan Malaysia 2021-03 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/16904/1/6.pdf Siti Hawa Mohd Yusoff, and Firdaus Mohamad Hamzah, and Othman Jaafar, and Hazrina Tajudin, (2021) Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia. Sains Malaysiana, 50 (3). pp. 629-644. ISSN 0126-6039 https://www.ukm.my/jsm/malay_journals/jilid50bil3_2021/KandunganJilid50Bil3_2021.html |
| spellingShingle | Siti Hawa Mohd Yusoff, Firdaus Mohamad Hamzah, Othman Jaafar, Hazrina Tajudin, Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia |
| title | Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia |
| title_full | Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia |
| title_fullStr | Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia |
| title_full_unstemmed | Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia |
| title_short | Long term trend analysis of upstream and middle-stream river in Langat Basin, Selangor, Malaysia |
| title_sort | long term trend analysis of upstream and middle stream river in langat basin selangor malaysia |
| url | http://journalarticle.ukm.my/16904/1/6.pdf |
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