The Gualala Salmon watershed is located in northern California and spans 265 square miles. The watershed is characterized by a Mediterranean climate with wet winters and dry summers, and precipitation primarily occurs between November and April. The watershed is heavily influenced by the Pacific Ocean, which contributes to the hydrology of the area. The watershed contains several important streams, including the Gualala River, which supports salmon populations. The area also experiences occasional flooding during heavy rain events. In terms of climate trends, the area has experienced an increase in winter temperatures and a decrease in snowpack levels in recent years, which can impact water availability in the watershed. The reservoirs in the watershed contain constituents such as sediment, nutrients, and organic matter, which can impact water quality and aquatic ecosystems.