The Marmaton watershed is located in Missouri, Kansas, and Oklahoma and covers an area of approximately 3,200 square miles. The watershed is characterized by prairie grasslands and croplands, with some forested areas. The hydrology of the watershed is influenced by the Osage Plains, which are characterized by rolling hills and shallow valleys. The Marmaton River, which is the major watercourse in the watershed, flows through the cities of Fort Scott and Nevada, Kansas. The watershed receives snowpack in the winter, which contributes to the surface water flow during the spring and summer. The reservoirs in the watershed are used for water supply, recreation, and flood control. The climatic trends in the Marmaton watershed show an increase in precipitation variability and a decrease in snowpack. These trends may have significant impacts on the water resources in the watershed and the communities that rely on them.