Lake Tahoe

Watershed Hydrology

The Lake Tahoe Watershed (HUC 16050101) covers an area of approximately 505 square miles and is located in the Sierra Nevada mountain range. The hydrology of the watershed is dominated by snowmelt and precipitation, with the majority of surface water flowing into Lake Tahoe. The snowpack in the region is critical for water supply, as it provides up to 75% of the annual water supply for the area. The surface water quality in Lake Tahoe is a significant concern, with excessive nutrients and sediment from urbanization and other human activities degrading the lake's clarity. The primary reservoirs in the watershed are Lake Tahoe and Donner Lake, which provide water for drinking, irrigation, and recreation. The climate is characterized by hot, dry summers and cold, snowy winters. Interesting climatic facts include the record-breaking snowfall in the winter of 2016-2017, which surpassed the previous record set in the winter of 1982-1983. Climate change is also affecting the region, with temperatures increasing and snowpack decreasing over time.


Surface Flows

Lake Tahoe Watershed

Snowpack Depths

Lake Tahoe Watershed

Dams & Reservoirs

Lake Tahoe Watershed

Groundwater Levels

Lake Tahoe Watershed

Lake Tahoe Rivers

Rivers of the Watershed