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Enhancement and Application of SWAT Auto-Calibration using Korean Ministry of Environment 8-Day Interval Flow/Water Quality data  

Kang, Hyunwoo (Department of Regional Infrastructures Engineering, Kangwon National University)
Ryu, Jichul (Department of Regional Infrastructures Engineering, Kangwon National University)
Kang, Hyungsik (Korea Environment Institute)
Choi, Jaewan (National Institute of Environmental Research)
Moon, Jongpil (National Academy of Agricultural Science)
Choi, Joongdae (Department of Regional Infrastructures Engineering, Kangwon National University)
Lim, Kyoung Jae (Department of Regional Infrastructures Engineering, Kangwon National University)
Publication Information
Journal of Korean Society on Water Environment / v.28, no.2, 2012 , pp. 247-254 More about this Journal
Abstract
Soil and Water Assessment Tool (SWAT) model has been widely used in estimation of flow and water quality at various watersheds worldwide, and it has an auto-calibration tool that could calibrate the flow and water quality data automatically from thousands of simulations. However, only continuous measured day flow/water quality data could be used in the current SWAT auto-calibration tool. Therefore, 8-day interval flow and water quality data measured nationwide by Korean Ministry of Environment (MOE) could not be used in SWAT auto-calibration even though long-term flow and water quality data in the Korean Total Maximum Daily Load (TMDL) watersheds available. In this study, current SWAT auto-calibration was modified to calibrate flow and water quality using 8-day interval flow and water quality data. As a result of this study, the Nash and Sutcliffe Efficiency (NSE) values for flow estimation using auto-calibration are 0.77 (calibration period) and 0.68 (validation period), and NSE value for water quality (T-P load) estimation (using the 8-day interval water quality data) is 0.80. The enhanced SWAT auto-calibration could be used in the estimation of continuous flow and water quality data at the outlet of TMDL watersheds and ungaged point of watersheds. In the next study, the enhanced SWAT auto-calibration will be integrated with Web based Load Duration Curve (LDC) system, and it could be suggested as methods of appraisal of TMDL in South Korea.
Keywords
Auto-calibration; Pollutant load; SWAT model; 8-day interval flow/water quality data;
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Times Cited By KSCI : 1  (Citation Analysis)
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