Now showing items 1-6 of 6
Surface Elevation Change Processes in the Snohomish River Estuary, Washington
Estuaries provide crucial ecosystem functions and contain significant socio-economic value. Within Washington State, estuaries supply rearing habitat for juvenile salmon during their transition period from freshwater to open sea. In order to properly manage wetland resources and restore salmon habitat, the mechanisms through ...
Evidence for liquefaction and flooding in the past 1,000 years along the Duwamish River, Seattle, Washington
Geology along the Duwamish waterway, south of downtown Seattle, provides preliminary clues to the city’s earthquake and tsunami hazards. The banks of the dredged waterway expose the muddy deposits of an estuary that formerly drained Mount Rainier. Different outcrops expose evidence for former events. So far, inferred ...
Sediment accumulation in a manipulated bay of Puget Sound, Bellingham, WA.
Mud Bay, located in Bellingham, Washington at the north end of Chuckanut Bay, is filling with sediment at a rate greater than projected sea-level rise. This is worrisome as the bay is an important habitat for eelgrass meadows, shellfish beds, and birds. Also, Chuckanut Creek, the primary fluvial input into the bay, has ...
Sediment characteristics at the delta of Chuckanut Creek, Mud Bay, Bellingham, Washington
ud Bay is south of Bellingham, WA, in the northern portion of Chuckanut Bay. It is predicted to be inundated by tsunamis generated by large Cascadia earthquakes. In this report, I describe shallow sediments in the bay and at the delta where Chuckanut Creek enters the bay. I also describe shoreline changes recorded by historic ...
Effects of Beaver Dam-Break Floods on Downstream Channels in King County, Washington
Beaver dam failures were responsible for 13 deaths between 1984 and 2003 and can cause damage to infrastructure and property (Butler and Malanson, 2005). In the Puget Lowland of western Washington State, the unique geologic setting with beaver ponds on steep-sided uplands, surrounding flat alluvial plains of rivers like the ...
Geomorphic Reconstruction of Alki Point in West Seattle Based on Chronostratigraphic Relationships of Mid-Late Holocene-Aged Intertidal Deposits
A tombolo may have tied a bedrock knoll at the western tip of Alki Point to the mainland before a large magnitude 7 or greater earthquake ruptured within the Seattle fault zone, resulting in ~23 ft of uplift at Alki Point and exposing shallow beach/intertidal deposits. The purpose of this study was to (1) reconstruct the ...