The Nishnabotna Watershed, also known as HUC 10240004, covers an area of approximately 2,611 square miles in western Iowa and eastern Nebraska. The watershed is characterized by rolling hills and contains multiple streams and rivers that feed into the Missouri River. The hydrology of the area is influenced by precipitation, which primarily falls as snow in the winter months. Snowpack in the watershed can accumulate up to 18 inches in some areas, contributing to significant runoff in the spring. Surface water in the watershed is used for irrigation, recreation, and drinking water. The reservoirs within the watershed also serve as flood control measures. Interesting climatic facts include that the area experiences hot summers and cold winters, with an average annual moisture deficit of 15 inches. Trends in recent years show that the Nishnabotna Watershed has experienced more frequent and intense precipitation events, leading to increased flooding and erosion.