The Lower Devils Watershed (HUC 13040302) covers an area of 191 square kilometers in central Idaho. The hydrology of the watershed is dominated by the Salmon River, which flows through the region. The snowpack in the area is significant, with snow depths of up to 3 meters in the winter months. Surface water flows are largely influenced by snowmelt, with peak flows occurring in the spring and early summer months. The watershed contains a number of reservoirs, which are used for irrigation and hydroelectric power generation. One interesting climatic fact about the region is that it experiences a semi-arid climate, with precipitation averaging around 380 mm per year. However, the region is also prone to drought, which can have significant impacts on agriculture and water resources. Trends in the region include increasing temperatures and a decrease in snowpack due to climate change.