Nonpoint source management area monitoring and assessment of management objectives achievement

A nonpoint source is not easy to take countermeasures against point sources flowed from land during rainfall. In order to establish systematic management of these nonpoint sources, a nonpoint source management area was designated in Article 54 of the Water Environment Conservation Act in Korea since 2007. Once an area is designated as a nonpoint source management area, management objectives, target substances, and concrete reduction measures are established for the management policies and implementation plans and the nonpoint reduction effect is analyzed based on the assessment of the achievement of management objectives. This study was conducted on the watersheds of Saemanguem showed both urban and rural land use and Goljicheon showed rural land use to be designated and reported as nonpoint source management areas. Accordingly, this study presented the concrete conditions of the two areas and the achievement results of the management objectives in each flow management section, which was the same as in the implementation plan. Based on these results, this study aimed to propose a monitoring method for nonpoint source management areas. The proposed method encompasses the improvement in setting management objectives, which could control the influence of nonpoint pollution, and a monitoring method for nonpoint sources.