The Horn Lake Nonconnah watershed (HUC 08010211) covers an area of approximately 315 square miles in western Tennessee and eastern Arkansas. The watershed is characterized by flat terrain, and the hydrology is dominated by the Nonconnah Creek, which flows through the center of the watershed before joining the Wolf River. In the winter months, the watershed receives occasional snowfall, but it is not a significant factor in the hydrology or water resources of the area. Surface water in the watershed includes numerous small streams and drainage ditches, as well as several reservoirs used for flood control and water supply. Reservoir constituents include sediment, nutrients, and contaminants from agricultural and urban runoff. Interesting climatic facts and trends in the area include increasing temperatures and precipitation variability over the past several decades, as well as occasional severe weather events such as tornadoes and flooding.