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The Simulation of Nutrients using SWAT Model and its Application to Estimate Delivery Ratio  

Choi, Daegyu (Department of Environmental System Engineering, Pukyong National University)
Shin, Hyun Suk (Department of Civil Engineering, Pusan National University)
Yoon, Young Sam (Nakdong River Environment Research Center, National Institute of Environmental Research)
Kim, Sangdan (Department of Environmental System Engineering, Pukyong National University)
Publication Information
Journal of Korean Society on Water Environment / v.25, no.3, 2009 , pp. 375-385 More about this Journal
Abstract
The estimation of delivery ratio is a essential part of Korean Total Maximum Daily Loads (TMDL) procedure which needs a number of observed stream flow and pollutants data. If observed data were not sufficient, researchers have to find other alternatives. One of them is to make indirect data by using watershed models, such as Soil and Water Assessment Tool (SWAT) and Hydrological Simulation Program - FORTRAN (HSPF) and so on. In this study, indirect daily data was made by using SWAT model. To build the Byongseong-SWAT model accurately, crop cultures are reflected by handling the MGT.file in SWAT model. Especially, mass of manure and schedule of crop culture are inputted through investigating domestic research papers as well as fieldwork. After calibrating SWAT model in comparison with the 22-years flow and pollutants observed outlet data, the delivery ratio of Byongseong watershed is calculated by using daily simulated data during 2004-2007. Empirical equations for delivery ratio through multi-regression analysis are developed by using meteorological and physical factors such as flow, watershed area, stream length, catchment slope, curve number (CN) and subbasin's pollutant discharge loads.
Keywords
Delivery ratio; SWAT; TMDL; Water quality simulation;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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