Lower Cannonball

Watershed Hydrology

The Lower Cannonball Watershed (HUC 10130206) covers an area of approximately 1,370 square kilometers in southwestern North Dakota. The watershed is characterized by its rolling hills and is drained by the Cannonball River. The hydrology of the watershed is influenced by the Missouri River, which provides flow to the Cannonball River through the Lake Oahe reservoir. The area experiences a semi-arid climate, with average annual precipitation ranging from 30-40 inches. The watershed receives most of its precipitation in the form of snow during the winter months. Surface water in the watershed is primarily used for agricultural purposes, with irrigation being the largest water use. The reservoir constituents of the area include sediment, nutrients, and other contaminants from agricultural practices. Interesting climatic facts include the frequent occurrence of droughts in the area and the potential impact of climate change on water availability and quality.


Surface Flows

Lower Cannonball Watershed

Snowpack Depths

Lower Cannonball Watershed

Dams & Reservoirs

Lower Cannonball Watershed

Groundwater Levels

Lower Cannonball Watershed

Lower Cannonball Rivers

Rivers of the Watershed