The Upper Kaskaskia Watershed (HUC 07140201) covers an area of approximately 1,873 square miles in south-central Illinois. The watershed is predominantly agricultural, with the majority of the land used for crop production. The hydrology of the area is characterized by intermittent streams and low-gradient drainage ditches, which are susceptible to flooding during heavy rainfall events. Snowpack in this region is generally limited, with average snowfall amounts ranging from 10-20 inches per year. Surface water in the watershed is primarily supplied by the Kaskaskia River, which flows through the region, and several smaller tributaries. There are also several small reservoirs and impoundments in the area, which are used for flood control, recreation, and water supply. Climatic trends in the region have shown an increase in average annual temperatures over the last several decades, as well as an increase in the frequency and intensity of heavy rainfall events. These trends are expected to continue in the coming years, which could have significant impacts on the hydrology and ecology of the Upper Kaskaskia Watershed.