The Lower Salt Fork Arkansas watershed covers an area of approximately 1,477 square miles in north-central Oklahoma. The hydrology of the watershed is characterized by the presence of the Salt Fork Arkansas River, which is the primary surface water source within the watershed. The watershed experiences a semi-arid climate with hot summers and cold winters. Snowfall in the watershed is typically minimal, with an average annual snowfall of less than 10 inches. The primary reservoir within the watershed is Kaw Lake, which is used for a variety of purposes, including flood control, recreation, and water supply. The reservoir is known to contain high levels of sediment and nutrients, which can lead to issues with water quality. In recent years, the watershed has experienced an increase in extreme weather events, including droughts and flooding.