EVALUATION OF DAILY AND MONTHLY STREAMFLOW SIMULATION BY SWAT MODEL IN THE KHLONG SUAN MAK WATERSHED
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Abstract
Presently, hydrological models have been accepted tools for assessing hydrological conditions at watershed levels. However, these models have some limitations. Thus, an application of the models needs to understand them and know their limitations that may be occurred in studies. The objective of this study is to evaluate daily and monthly streamflow data simulated using the SWAT model in the Khlong Suan Mak watershed. The sensitivity analysis of model parameters was also conducted using SWAT-CUP. The simulated results were compared to the observed streamflow between 2010 and 2017 at the Ban Mai station (P.26A). The results show that 13 and 10 parameters had significant influences on daily and monthly streamflow simulations, respectively, because their P-values were lower than 0.05. Moreover, SWAT simulated streamflow was acceptable. Daily and monthly simulations were categorized as satisfactory (R2, NSE, and PBIAS of 0.56, 0.56, and 5.13%, respectively) and good (R2, NSE, and PBIAS of 0.72, 0.72, and 5.90%), respectively. The results of this study were expected to be useful information for the application of a model as an effective tool in water resources management in the Khlong Suan Mak watershed in the future.
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
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