A project in South Korea created replacement wetlands alongside river improvements, but the wetlands weren't properly evaluated for their environmental benefits. To fix this, the functions of the replacement wetlands were studied before and after the project to create a management plan. The study looked at how the wetlands affect water flow, ecology, and geology. By analyzing variables like water quality, plant and animal habitats, the researchers developed a plan to manage the wetlands better in the future, especially with climate change in mind.