Hydrogeologic assessment of the Sequim-Dungeness area, Clallam County, Washington / Blakemore E. Thomas, Layna A. Goodman, and Theresa D. Olsen.
(Book)

The Sequim-Dungeness area covers 116 square miles (mi2) on the northern part of the Olympic Peninsula in northwestern Washington. The central part of this area (74 mi2) was designated as a primary study area. During the past two decades, the population has rapidly increased, land use has changed from mostly agricultural to residential, and salmon populations in the Dungeness River have appreciably declined. The increasing competition for water combined with a close relation between ground water, the Dungeness River, and an extensive irrigation system has created a need for a better understanding of ground water and the relation between ground water and surface water in the study area.