The Little Nemaha Watershed (HUC 10240006) covers approximately 649 square miles of land area in southeastern Nebraska. The watershed is characterized by rolling hills, croplands, and pasturelands. The Little Nemaha River, a major tributary of the Missouri River, flows through the watershed. The hydrology of the watershed is influenced by precipitation, runoff, and groundwater recharge. The snowpack in the watershed is variable, with some years seeing heavy snowfall and others experiencing little to no snow. Surface water in the watershed is used for irrigation, recreation, and wildlife habitat. The reservoirs in the watershed contain sediment, nutrients, and other organic matter that can affect water quality. Interesting climatic facts and trends include an increase in average temperatures over the past century and an increase in the frequency of extreme weather events, such as floods and droughts.