Given the extensive rice paddy fields in South Korea, accurate simulation of hydrological behavior in these fields is critical due to their considerable water resource usage. The soil and water assessment tool (SWAT) is commonly used to simulate watershed water flows and quality, including those in rice paddy fields. However, it lacks comprehensive consideration of submerging water conditions typical to South Korean rice paddies. Therefore, this study introduced a modification to the SWAT model to better simulate these conditions and assessed its feasibility in two distinct watersheds. The first application evaluated the impact of submerging water conditions on surface, subsurface, and base flows. The second assessed the impact of combined submerging water and fertilization conditions on the flow and water quality within the watershed. The findings indicated that submerging water conditions significantly affected runoff, and that water quality was responsive to different fertilization scenarios.

鉴于韩国稻田面积广阔，由于其水资源消耗量很大，准确模拟这些稻田的水文行为至关重要。土壤和水评估工具（SWAT）通常用于模拟流域水流和水质，包括稻田的水流和水质。然而，它缺乏对韩国稻田典型的淹没水条件的综合考虑。因此，本研究对 SWAT 模型进行了修改，以更好地模拟这些条件，并评估其在两个不同流域的可行性。第一个应用评估了淹没水条件对地表、地下和基流的影响。第二个评估了淹没水和施肥条件对流域内流量和水质的影响。