Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand
The main purpose of this paper was to investigate the monthly, seasonal, and annual rainfall variability in the Mae Klong River Basin in Thailand using the Mann–Kendall (MK) test, Sen's slope method, Spearman's Rho (SR) test, and the innovative trend analysis (ITA) method. The monthly rain...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-12-01
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| Series: | Journal of Water and Climate Change |
| Subjects: | |
| Online Access: | http://jwcc.iwaponline.com/content/14/12/4642 |
| _version_ | 1797202761263087616 |
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| author | Alamgir Khalil |
| author_facet | Alamgir Khalil |
| author_sort | Alamgir Khalil |
| collection | DOAJ |
| description | The main purpose of this paper was to investigate the monthly, seasonal, and annual rainfall variability in the Mae Klong River Basin in Thailand using the Mann–Kendall (MK) test, Sen's slope method, Spearman's Rho (SR) test, and the innovative trend analysis (ITA) method. The monthly rainfall data of eight stations for the period 1971–2015 were used for trend analysis. Datasets with significant serial correlation were corrected by the trend-free pre-whitening (TFPW) approach for statistical methods. The MK test showed increasing rainfall trends for five out of eight stations in the dry season while 50% of stations indicated increasing trends in the wet season. On an annual scale, 75% of the stations exhibited increasing rainfall trends. The results of the SR test were in line with the MK test for seasonal and annual rainfall. The ITA method showed comparable findings with those of the statistical methods. For the entire basin, trend analysis found increasing rainfall on both seasonal and annual scales by all the tests. The findings of this study could benefit water supply and management, drought monitoring, agricultural production activities, and socioeconomic development in the Mae Klong River Basin in the future.
HIGHLIGHTS
Statistical methods and graphical methods for rainfall trends are compared.;
Datasets with significant serial correlation were corrected by the trend-free pre-whitening (TFPW) approach for statistical methods.;
The results of Spearman's Rho test were in line with the Mann–Kendall test for seasonal and annual rainfall.;
The innovative trend analysis method showed comparable findings with those of the statistical methods.; |
| first_indexed | 2024-03-08T17:45:12Z |
| format | Article |
| id | doaj.art-a8298ead94e4463e820a511a28e931f4 |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-04-24T08:08:34Z |
| publishDate | 2023-12-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-a8298ead94e4463e820a511a28e931f42024-04-17T08:41:19ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542023-12-0114124642466810.2166/wcc.2023.552552Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, ThailandAlamgir Khalil0 Department of Civil Engineering, University of Engineering and Technology, Peshawar 25120, Pakistan The main purpose of this paper was to investigate the monthly, seasonal, and annual rainfall variability in the Mae Klong River Basin in Thailand using the Mann–Kendall (MK) test, Sen's slope method, Spearman's Rho (SR) test, and the innovative trend analysis (ITA) method. The monthly rainfall data of eight stations for the period 1971–2015 were used for trend analysis. Datasets with significant serial correlation were corrected by the trend-free pre-whitening (TFPW) approach for statistical methods. The MK test showed increasing rainfall trends for five out of eight stations in the dry season while 50% of stations indicated increasing trends in the wet season. On an annual scale, 75% of the stations exhibited increasing rainfall trends. The results of the SR test were in line with the MK test for seasonal and annual rainfall. The ITA method showed comparable findings with those of the statistical methods. For the entire basin, trend analysis found increasing rainfall on both seasonal and annual scales by all the tests. The findings of this study could benefit water supply and management, drought monitoring, agricultural production activities, and socioeconomic development in the Mae Klong River Basin in the future. HIGHLIGHTS Statistical methods and graphical methods for rainfall trends are compared.; Datasets with significant serial correlation were corrected by the trend-free pre-whitening (TFPW) approach for statistical methods.; The results of Spearman's Rho test were in line with the Mann–Kendall test for seasonal and annual rainfall.; The innovative trend analysis method showed comparable findings with those of the statistical methods.;http://jwcc.iwaponline.com/content/14/12/4642innovative trend analysismae klong river basinmann–kendall testrainfall trendssen's slope testspearman's rho test |
| spellingShingle | Alamgir Khalil Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand Journal of Water and Climate Change innovative trend analysis mae klong river basin mann–kendall test rainfall trends sen's slope test spearman's rho test |
| title | Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand |
| title_full | Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand |
| title_fullStr | Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand |
| title_full_unstemmed | Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand |
| title_short | Combined use of graphical and statistical approaches for rainfall trend analysis in the Mae Klong River Basin, Thailand |
| title_sort | combined use of graphical and statistical approaches for rainfall trend analysis in the mae klong river basin thailand |
| topic | innovative trend analysis mae klong river basin mann–kendall test rainfall trends sen's slope test spearman's rho test |
| url | http://jwcc.iwaponline.com/content/14/12/4642 |
| work_keys_str_mv | AT alamgirkhalil combineduseofgraphicalandstatisticalapproachesforrainfalltrendanalysisinthemaeklongriverbasinthailand |