The Lower Ohio Watershed (HUC 05140206) covers an area of approximately 3,150 square miles and is located in Indiana, Kentucky, and Ohio. The hydrology of the watershed is dominated by the Ohio River, which serves as a major source of surface water. The snowpack in the region is generally light, but can cause flooding during periods of rapid melting. The watershed contains several reservoirs, including the Rough River Lake and Nolin River Lake, which are used for flood control, recreation, and water supply. The primary constituents of these reservoirs include sediment, nutrients, and dissolved oxygen. In terms of climatic trends, the Lower Ohio Watershed experiences hot, humid summers and cold winters. Over the last century, the region has experienced an increase in average temperatures, which has resulted in more frequent and severe heatwaves. Additionally, the area has seen an increase in the frequency and intensity of extreme precipitation events, leading to an increased risk of flooding. Overall, the Lower Ohio Watershed is an important ecological and economic resource for the region, serving as a source of drinking water, energy, and recreation.