Author(s): Dong-Jin Lee; Hong-Kyu Ahn
Linked Author(s): Hong-Kyu Ahn
Keywords: Structures Biodiversity Fish movement Disconnection Repair
Abstract: Crossing structures in rivers are installed for the purposes of securing water, managing river water levels and flow rates, managing river ecosystems, and stabilizing rivers. However, the constructed crossing structures have problems such as blocking the continuity of the river, causing water quality deterioration, interrupting the movement of organisms between upstream and downstream rivers, damaging the ecosystem downstream of the river, causing negative aesthetic effects, and causing human casualties. Therefore, systematic management of crossing structures is necessary through on-site investigation of crossing structures within the same basin. Accordingly, in this study, we investigated the current status of crossing structures installed in 31 rivers in the Seom River Basin, South Korea, and conducted an evaluation of the continuity of the aquatic ecosystem. As a result of a survey on the current status of crossing structures in 31 rivers, it was found that there were a total of 536 crossing structures. Among them, there were 131 crossing structures with fishways. As a result of the aquatic ecosystem continuity evaluation of 31 rivers, 2 rivers were evaluated as continuous, 5 rivers were evaluated as damaged, and 24 rivers were evaluated as disconnected. In order to improve the continuity of the aquatic ecosystem in the Seom River basin, improvement of crossing structures is necessary.
Year: 2025