The study evaluated how well a constructed wetland in an agricultural area in Korea removes pollutants from water. By analyzing data from field experiments, researchers found that the wetland was effective in reducing sediment, organic matter, nitrogen, and phosphorus levels in stormwater. They discovered that the wetland's performance was influenced by factors like rainfall depth, intensity, and dry days before a storm. These findings can help in developing models to predict nonpoint source pollution and understand how rainfall affects water quality in agricultural areas.