Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios
Also available in printed version
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| Autres auteurs: | |
| Format: | Doctoral thesis |
| Langue: | anglais |
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Universiti Teknologi Malaysia
2025
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| Sujets: | |
| Accès en ligne: | https://utmik.utm.my/handle/123456789/47697 |
| Abstract | Abstract here |
| _version_ | 1854975060131971072 |
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| author | Zulfaqar Sa�adi |
| author2 | Shamsuddin Shahid, supervisor |
| author_facet | Shamsuddin Shahid, supervisor Zulfaqar Sa�adi |
| author_sort | Zulfaqar Sa�adi |
| description | Also available in printed version |
| format | Doctoral thesis |
| id | utm-123456789-47697 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-476972025-08-20T21:51:24Z Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios Zulfaqar Sa�adi Shamsuddin Shahid, supervisor Civil engineering Also available in printed version Spatial and temporal variability of climate play a key role in many ecological and environmental processes. The major objective of the study is to assess historical changes and future projection in spatial and temporal pattern of climate as well as its impacts on surface water availability. Sarawak, which has the richest and heterogeneous ecology of the world was selected as the study area. Non-parametric modified Mann-Kendall test which can discriminate unidirectional trend from the natural variability of climate was used for the assessment of changes in climate. Furthermore, quantile regression was used to assess the distributional changes in climate and river flow. A novel approach based on information entropy was used for the selection of general circulation models (GCMs) ensemble suitable for projection of climate. Furthermore, a new non-local model statistics output (MOS) based approach was proposed for downscaling of climate. Finally, empirical hydrological models were used for the assessment of the impact of climate change on flow of major river basins of Sarawak. The results revealed that daily mean temperature of Sarawak was increasing in the range of 0.09 to 0.11 oC/decade for the period of 1970-2012, while there was no significant change in annual and seasonal rainfall when natural variability of climate was taken into consideration. However, distributional changes in rainfall revealed a significant increase in higher quantiles of rainfall, especially during Northeast monsoon months, which was also found to alter the extreme river flow in some of the river basins. Different sets of GCMs were found suitable for projection of rainfall and temperature of Sarawak. Overall, the model selection approach was found very successful to reduce the number of GCMs for reliable projection of climate. The downscaling models developed in the study were able to replicate historical rainfall with a mean error less than 50 mm/month. The projection of future temperature revealed that maximum temperature would increase (1.2 to 2.6oC) compared to a minimum temperature (1.0 to 2.2oC) in the end of the century (2070-2099) which would cause an increase in diurnal temperature range. Increase in temperature would cause an increase in rainfall in the range of 1.3% to 17.8% for different RCPs. The seasonal changes in rainfall showed increasing rainfall throughout Sarawak in January and December, with a drier climate for February to November. Hydrological models revealed heterogeneous changes in wet and dry conditions in different river basins due to climate change, which may increase both floods and droughts in Sarawak. fahmimoksen UTM 307 p. Thesis (Doktor Falsafah (Kejuruteraan Awam)) - Universiti Teknologi Malaysia, 2018 2025-03-12T05:56:32Z 2025-03-12T05:56:32Z 2018 Doctoral thesis https://utmik.utm.my/handle/123456789/47697 vital:130040 valet-20191030-103355 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Civil engineering Zulfaqar Sa�adi Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios |
| thesis_level | PhD |
| title | Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios |
| title_full | Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios |
| title_fullStr | Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios |
| title_full_unstemmed | Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios |
| title_short | Spatiotemporal changes in climate and hydrology of Sarawak under different representative concentration pathways scenarios |
| title_sort | spatiotemporal changes in climate and hydrology of sarawak under different representative concentration pathways scenarios |
| topic | Civil engineering |
| url | https://utmik.utm.my/handle/123456789/47697 |
| work_keys_str_mv | AT zulfaqarsaadi spatiotemporalchangesinclimateandhydrologyofsarawakunderdifferentrepresentativeconcentrationpathwaysscenarios |