Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand
This study examined seasonal and annual trends of rainfall and streamflow data in the Mae Klong Basin, Thailand. Monthly data of eight key rainfall stations and ten streamflow stations were analyzed to detect trends using the non-parametric Mann-Kendall test, whilst the magni-tude of the trends was...
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| Format: | Article |
| Language: | English |
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Environmental Research Institute, Chulalongkorn University
2018-09-01
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| Series: | Applied Environmental Research |
| Subjects: | |
| Online Access: | https://ph01.tci-thaijo.org/index.php/saujournalst/www.tci-thaijo.org/index.php/aer/article/view/110487 |
| _version_ | 1828178066395889664 |
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| author | Alamgir Khalil Areeya Rittima Yutthana Phankamolsil |
| author_facet | Alamgir Khalil Areeya Rittima Yutthana Phankamolsil |
| author_sort | Alamgir Khalil |
| collection | DOAJ |
| description |
This study examined seasonal and annual trends of rainfall and streamflow data in the Mae Klong Basin, Thailand. Monthly data of eight key rainfall stations and ten streamflow stations were analyzed to detect trends using the non-parametric Mann-Kendall test, whilst the magni-tude of the trends was determined by Sen’s slope method for the period 2000-2015. For 75 % of the analyzed stations, rainfall was found to increase in the wet season and decrease in the dry season. Station 130013 situated in the lower region showed a statistically significant increasing trend with a trend slope of 16.02 mm a-1 in the wet season, while station 130042- also located in the lower region of the basin- showed a statistically significant decreasing trend, with a trend slope of 23.60 mm a-1 in the dry season. On an annual basis, 63 % of the analyzed stations showed increasing rainfall trends, particularly in the central and lower regions of the Mae Klong Basin; however, rainfall trends in the upper region were found to be decreasing, which reflected water contributions to two main reservoirs in the upper part. The trends of naturalized inflow of Srinagarind and Vajiralongkorn Reservoirs were found to be decreasing on both seasonal and annual bases, while two naturalized streamflow stations located in Lam Taphoen and Lampachi sub-basins in the central and lower regions, respectively, showed increasing trends in both dry and wet seasons. The trends of regulated streamflow stations downstream of 4 main dams which were a result of reservoir operation were found to mostly decrease on an annual scale. Results of this study can help water resources managers enhance accuracy of assessment and effective planning of water resources management in the basin.
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| first_indexed | 2024-04-12T05:09:47Z |
| format | Article |
| id | doaj.art-dcaf027c8b1746789e8c473eda099fe6 |
| institution | Directory Open Access Journal |
| issn | 2287-0741 2287-075X |
| language | English |
| last_indexed | 2024-04-12T05:09:47Z |
| publishDate | 2018-09-01 |
| publisher | Environmental Research Institute, Chulalongkorn University |
| record_format | Article |
| series | Applied Environmental Research |
| spelling | doaj.art-dcaf027c8b1746789e8c473eda099fe62022-12-22T03:46:48ZengEnvironmental Research Institute, Chulalongkorn UniversityApplied Environmental Research2287-07412287-075X2018-09-01403Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, ThailandAlamgir Khalil0Areeya Rittima1Yutthana Phankamolsil2Department of Civil Engineering, University of Engineering and Technology, Peshawar, PakistanFaculty of Engineering, Mahidol University, Nakhon Pathom, ThailandEnvironmental Engineering and Disaster Management Program, Mahidol University, Kanchanaburi, Thailand This study examined seasonal and annual trends of rainfall and streamflow data in the Mae Klong Basin, Thailand. Monthly data of eight key rainfall stations and ten streamflow stations were analyzed to detect trends using the non-parametric Mann-Kendall test, whilst the magni-tude of the trends was determined by Sen’s slope method for the period 2000-2015. For 75 % of the analyzed stations, rainfall was found to increase in the wet season and decrease in the dry season. Station 130013 situated in the lower region showed a statistically significant increasing trend with a trend slope of 16.02 mm a-1 in the wet season, while station 130042- also located in the lower region of the basin- showed a statistically significant decreasing trend, with a trend slope of 23.60 mm a-1 in the dry season. On an annual basis, 63 % of the analyzed stations showed increasing rainfall trends, particularly in the central and lower regions of the Mae Klong Basin; however, rainfall trends in the upper region were found to be decreasing, which reflected water contributions to two main reservoirs in the upper part. The trends of naturalized inflow of Srinagarind and Vajiralongkorn Reservoirs were found to be decreasing on both seasonal and annual bases, while two naturalized streamflow stations located in Lam Taphoen and Lampachi sub-basins in the central and lower regions, respectively, showed increasing trends in both dry and wet seasons. The trends of regulated streamflow stations downstream of 4 main dams which were a result of reservoir operation were found to mostly decrease on an annual scale. Results of this study can help water resources managers enhance accuracy of assessment and effective planning of water resources management in the basin. https://ph01.tci-thaijo.org/index.php/saujournalst/www.tci-thaijo.org/index.php/aer/article/view/110487Rainfall and streamflow trends analysisMann-Kendall’s TestSen’s Slope TestMae Klong Basin |
| spellingShingle | Alamgir Khalil Areeya Rittima Yutthana Phankamolsil Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand Applied Environmental Research Rainfall and streamflow trends analysis Mann-Kendall’s Test Sen’s Slope Test Mae Klong Basin |
| title | Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand |
| title_full | Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand |
| title_fullStr | Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand |
| title_full_unstemmed | Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand |
| title_short | Seasonal and Annual Trends of Rainfall and Streamflow in the Mae Klong Basin, Thailand |
| title_sort | seasonal and annual trends of rainfall and streamflow in the mae klong basin thailand |
| topic | Rainfall and streamflow trends analysis Mann-Kendall’s Test Sen’s Slope Test Mae Klong Basin |
| url | https://ph01.tci-thaijo.org/index.php/saujournalst/www.tci-thaijo.org/index.php/aer/article/view/110487 |
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