The Upper Ohio watershed, located in western Pennsylvania and northern West Virginia, covers an area of approximately 3,540 square miles. The main river in the watershed is the Ohio River, which is fed by a network of tributaries, including the Allegheny River and the Monongahela River. The hydrology of the region is influenced by a variety of factors, including seasonal precipitation, snowmelt, and groundwater recharge. The Upper Ohio watershed experiences significant snowpack during the winter months, which can contribute to increased surface water runoff in the spring. Reservoirs in the watershed are primarily used for flood control and recreation, and may contain sediment and pollutants from agricultural runoff and urban development. The climate in the region is characterized by four distinct seasons, with warm summers and cold winters. In recent years, there has been a trend towards warmer temperatures and increased precipitation in the region, which may have implications for water resources management and ecosystem health.