Swan

Watershed Hydrology

The Swan Watershed (HUC 17010211) covers an area of approximately 721 square miles in northwest Montana. The watershed is fed primarily by snowmelt and receives an average of 110 inches of snowfall annually. The snowpack plays a vital role in the hydrology of the area, as it provides the majority of the water supply for the watershed's streams and surface water sources. The watershed contains several notable surface water bodies, including Swan Lake and the Flathead River, which provide habitat for a range of aquatic species. The area is also home to several reservoirs that help regulate water flow and provide recreational opportunities. The Swan Watershed experiences a continental climate, with cold winters and warm summers. In recent years, the area has seen an increase in both average temperatures and precipitation, which has impacted the snowpack and water availability in the area.


Surface Flows

Swan Watershed

Snowpack Depths

Swan Watershed

Dams & Reservoirs

Swan Watershed

Groundwater Levels

Swan Watershed

Swan Rivers

Rivers of the Watershed