Zanial, Wan Norsyuhada Che Wan and Malek, Marlinda Abdul and Reba, Mohd Nadzri Md and Zaini, Nuratiah and Ahmed, Ali Najah and Sherif, Mohsen and Elshafie, Ahmed (2023) Rainfall-runoff modelling based on global climate model and tropical rainfall measuring mission (GCM-TRMM): A case study in Hulu Terengganu catchment, Malaysia. Heliyon, 9 (5). ISSN 2405-8440, DOI https://doi.org/10.1016/j.heliyon.2023.e15740.
Full text not available from this repository.Abstract
The hydropower Plant in Terengganu is one of the major hydroelectric dams currently operated in Malaysia. For better operating and scheduling, accurate modelling of natural inflow is vital for a hydroelectric dam. The rainfall-runoff model is among the most reliable models in predicting the inflow based on the rainfall events. Such a model's reliability depends entirely on the reliability and consistency of the rainfall events assessed. However, due to the hydropower plant's remote location, the cost associated with maintaining the installed rainfall stations became a burden. Therefore, the study aims to create a continuous set of rainfall data before, during, and after the construction of a hydropower plant and simulate a rainfall-runoff model for the area. It also examines the reliability of alternative methods by combining rainfall data from two sources: the general circulation model and tropical rainfall measuring mission. Rainfall data from ground stations and generated data using inverse distance weighted method will be compared. The sta-tistical downscaling model will obtain regional rainfall from the general circulation model. The data will be divided into three stages to evaluate the accuracy of the models in capturing inflow changes. The results revealed that rainfall data from TRMM is more correlated to ground station data with R2 = 0.606, while SDSM data has R2 = 0.592. The proposed inflow model based on GCM-TRMM data showed higher precision compared to the model using ground station data. The proposed model consistently predicted inflow during three stages with R2 values ranging from 0.75 to 0.93.
| Item Type: | Article |
|---|---|
| Funders: | BOLD Scholarship, College of Graduate School, Universiti Tenaga Nasional, Malaysia |
| Uncontrolled Keywords: | Hydropower plant; GCM; SDSM; TRMM; Inflow |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering > Department of Civil Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 30 Sep 2025 07:46 |
| Last Modified: | 30 Sep 2025 07:46 |
| URI: | http://eprints.um.edu.my/id/eprint/50334 |
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