The Duck River Basin in Tennessee is one of the most ecologically rich river systems in the USA. However, it is highly sensitive to changes in climate, especially when it comes to streamflow—the amount of water flowing through the river. This study looks at how climate change could affect streamflow in the future using computer models that simulate different levels of greenhouse gas emissions. By combining climate projections with hydrologic model, we predicted how streamflow might change through the end of the century. Our results show a clear pattern: winters will likely become wetter with higher river flows, especially from January to March, while summers will become drier with much lower flows from June through September. These seasonal extremes are expected to grow stronger over time, especially in warmer climate scenarios. This could lead to more frequent summer droughts and strain on water supplies. The findings highlight the need for proactive planning, including better water management and more resilient infrastructure, to protect communities, ecosystems, and water resources in the face of a changing climate.

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