The Lower Sappa Watershed, HUC 10250011, covers an area of approximately 227,500 acres in Northwest Missouri, USA. The area is characterized by a humid continental climate, with hot summers and cold winters. The hydrology of the watershed is mainly dominated by the Missouri River, the largest river in the region, and its tributaries, including the Lower Sappa River. The snowpack in the watershed is minimal, with an average snowfall of about 16 inches per year. Surface waters in the watershed are used for public water supply, irrigation, and recreational activities. Reservoir constituents in the watershed include sediment, nutrients, and organic matter. Interesting climatic facts include the occurrence of severe thunderstorms and floods, as well as increasing temperatures and precipitation patterns over the past century, which may impact the hydrology and ecology of the region.