SWAT Literature Database for Peer-Reviewed Journal Articles

Title:Investigating influence of hydrological regime on organic matters characteristic in a Korean Watershed 
Authors:Baek, S.S., J. Jeon, H. Lee, J. Park and K.H. Cho 
Volume (Issue):11(3) 
Article ID: 
URL (non-DOI journals): 
Broad Application Category:hydrologic only 
Primary Application Category:model and/or data interface 
Secondary Application Category:nutrient cycling/loss and transport 
Watershed Description:1061.1 km^2 Taehwa River, which drains the Ulsan City metropolitan area that is located in the northeast part of the Province pf Gyeongsangnam-do in southern South Korea. 
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Abstract:Source tracking of dissolved organic matter (DOM) is important to manage water quality in rivers. However, it is difficult to find the source of this DOM because various DOMs can be added from the river watershed. Moreover, the DOM composition can be changed due to environmental conditions. This study investigated the change of organic matter characteristics in the Taewha River of Ulsan City, Korea, before and after rainfall. A Soil and Water Assessment Tool (SWAT) was used to simulate water flow from various sources, and dissolved organic matter characterization was conducted in terms of molecular size distribution, hydrophobicity, fluorescence excitation and emission, and molecular composition. From the results, it was found that lateral flow transported hydrophobic and large-molecule organic matter after rainfall. According to the orbitrap mass spectrometer analysis, the major molecular compound of the DOM was lignin. Coupling the SWAT model with organic matter characterization was an effective approach to find sources of DOM in river. 
Keywords:Dissolved organic matter (DOM); Fluorescence excitation emission matrix (EEM); Orbitrap mass spectrometry; Soil and water assessment tool (SWAT)