Washington Water Science Center

Water Availability and Use

WAWSC scientists provide data and tools to State, Local, Tribal and Federal water managers to assist them in best allocating groundwater supplies while also meeting both instream and out-of-stream demands. We characterize local- to regional-scale aquifer systems, measure basin water budgets and interactions between groundwater and surface water, and develop numerical models to understand how extensively-managed hydrologic systems respond to changes. Issues being addressed include predicting the effects of alternative water-resource management strategies, conjunctive groundwater and surface-water uses, climate change, and growing water demands. We also are working to understand how these changes may affect saltwater intrusion into coastal aquifers, and discharge of groundwater into stream, wetland, and estuarine habitats.

Filter Total Items: 53
Date published: January 5, 2001
Status: Completed

Water Resources Inventory Area 1 Watershed Management

In recent years, increased use of ground- and surface-water supplies in watersheds of Washington State has created concern that insufficient in-stream flows remain for fish and other users. In response, the Washington State legislature passed the Watershed Management Act of 1998 (ESHB 2514; see also Ch.90.82 RCW - Watershed Planning), which encourages and provides some funding for local...

Date published: January 3, 2001
Status: Completed

Puget Sound-Willamette Trough

More than 70 percent of the population of Washington and Oregon resides in the Puget Sound-Willamette Trough, which stretches north-south on the western side of the Cascade Range. The area is one of the principal regional ground-water systems in the Nation, but little is known about the quantity and quality of the ground water, the regional flow system, or the interaction of the system with...

Date published: January 3, 2000
Status: Completed

Elwha-Morse Watershed

Have increased demands for Washington State's ground water and surface water left sufficient stream flows for fish and other uses?

To find out, the state's Watershed Management Act of 1998 (ESHB 2514) confers on local people the responsibility for conducting local watershed planning.

The Elwha-Morse Watershed area was formed out of the western part of Water Resources Inventory...

Date published: January 2, 2000
Status: Completed

Pierce County Groundwater

The rapid growth of population in the Tacoma-Puyallup area in Pierce County has placed increasing demands on the ground-water resource. Most domestic water needs are met by wells completed in the several hundred feet of glacial deposits that underlie the area, and about 9,000 persons are served by a single spring on the southwestern side of Puyallup. Most of the population relies on individual...

Date published: January 1, 2000
Status: Completed

Probability Flows for Streams in Eastern WA

Under Washington regulations, bridges, culverts, and other stream-crossing structures need to be designed with fish passage in mind. For culverts, maximum flows cannot exceed a 10-percent exceedance probability flow (the flow that is equalled or exceeded 10 percent of the time) when fish are migrating upstream.

To help the Washington Department of Natural Resources manage its culverts...