Modification of SWAT auto-calibration for accurate flow estimation at all flow regimes
| العنوان: | Modification of SWAT auto-calibration for accurate flow estimation at all flow regimes |
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| المؤلفون: | Chun-Hwa Jang, Dong Hyuk Kum, Yongchul Shin, Jongpil Moon, Dong Soo Kong, Ji-Chul Ryu, Joongdae Choi, Kyoung Jae Lim, Hyunwoo Kang |
| المصدر: | Paddy and Water Environment. 14:499-508 |
| بيانات النشر: | Springer Science and Business Media LLC, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Hydrology, Environmental Engineering, Baseflow, 010504 meteorology & atmospheric sciences, Soil and Water Assessment Tool, 0208 environmental biotechnology, 02 engineering and technology, 01 natural sciences, 020801 environmental engineering, Current (stream), Hydrology (agriculture), Streamflow, Calibration, Environmental science, SWAT model, Surface runoff, Agronomy and Crop Science, 0105 earth and related environmental sciences, Water Science and Technology |
| الوصف: | To secure accuracy in the Soil and Water Assessment Tool (SWAT) simulation for various hydrology and water quality studies, calibration and validation should be performed. When calibrating and validating the SWAT model with measured data, the Nash–Sutcliffe efficiency (NSE) is widely used, and is also used as a goal function of auto-calibration in the current SWAT model (SWAT ver. 2009). However, the NSE value has been known to be influenced by high values within a given dataset, at the cost of the accuracy in estimated lower flow values. Furthermore, the NSE is unable to consider direct runoff and baseflow separately. In this study, the existing SWAT auto-calibration was modified with direct runoff separation and flow clustering calibration, and current and modified SWAT auto-calibration were applied to the Soyanggang-dam watershed in South Korea. As a result, the NSE values for total streamflow, high flow, and low flow groups in direct runoff, and baseflow estimated through modified SWAT auto-calibration were 0.84, 0.34, 0.09, and 0.90, respectively. The NSE values of current SWAT auto-calibration were 0.83, 0.47, −0.14, and 0.90, respectively. As shown in this study, the modified SWAT auto-calibration shows better calibration results than current SWAT auto-calibration. With these capabilities, the SWAT-estimated flow matched the measured flow data well for the entire flow regime. The modified SWAT auto-calibration module developed in this study will provide a very efficient tool for the accurate simulation of hydrology, sediment transport, and water quality with no additional input datasets. |
| تدمد: | 1611-2504 1611-2490 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::db5f04db410616955b6b22d6ac9f9e3d https://doi.org/10.1007/s10333-015-0519-6 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........db5f04db410616955b6b22d6ac9f9e3d |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 16112504 16112490 |
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