Because of multifunctional weirs installed as part of large river regulation works in Korea, water quality problems have arisen from environmental changes in tandem with decreased flow rates. However, there has been limited research into the green algae removal effect, water quality improvement in congested waters, dam and weir operations, and consequential riverbed changes. Studies regarding outflow in a basin, the application and development of sediment load output analysis methods, feasibility of related dam operations, and riverbed patterns have been separately performed. However, basins and rivers should be analyzed by an integrated method instead of an individual one. Therefore, in the present study, the effect of congestion on a river connected to a dam/weir and estuary bank was analyzed based on climate change scenarios HadGEM3-RA RCP 4.5 and 8.5, with the aim of integrating individual studies using watershed and river models. Flow was controlled by dam- and weir-related discharge simulations. Variations in the riverbed caused by the transfer of suspended load in the downstream region were analyzed for both long and short durations. The results of this analysis suggest that given future climate change scenarios, the width of the river and riverbed variations in the riverbed are expected to rise.

由于在韩国的大型河道整治工程中安装了多功能堰，因此水质问题是由于环境变化和流速降低而引起的。然而，关于绿藻去除效果，拥挤水域水质改善，大坝和堰的运行以及随之而来的河床变化的研究还很有限。已经分别进行了有关流域外流，泥沙负荷输出分析方法的应用和发展，相关大坝运行的可行性以及河床模式的研究。但是，应采用综合方法而不是单个方法来分析流域和河流。因此，在本研究中，基于气候变化情景HadGEM3-RA RCP 4，分析了交通拥堵对与大坝/堰和河口岸相连的河流的影响。参见图5和8.5，目的是使用分水岭和河流模型整合单个研究。流量通过与大坝和堰相关的排放模拟进行控制。长期和短期的持续时间，分析了由下游地区的悬浮负荷转移引起的河床变化。分析的结果表明，在未来的气候变化情景下，河床的宽度和河床中的河床变化预计会增加。