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Full-Text Articles in Physical Sciences and Mathematics
Interpretation Of The Thermal Behavior Of Groundwater In An Alluvial Terrace : Bonneville Dam, Columbia Gorge, Oregon, Richard Stephen Malin
Interpretation Of The Thermal Behavior Of Groundwater In An Alluvial Terrace : Bonneville Dam, Columbia Gorge, Oregon, Richard Stephen Malin
Dissertations and Theses
Groundwater temperature data, collected at an alluvial terrace located on the Oregon shore of the Columbia River downstream from Bonneville Darn, was analyzed in order to characterize and formulate a conceptual model of the thermal data for the groundwater system in the terrace. There is concern that an unlined entrance channel for a new navigation lock, to be located down the middle of the terrace, will widen the range of temperatures in the fish hatchery-groundwater supply. The analysis of temperature behavior in the terrace supports the hydraulic observations derived from analysis of pump test data, but with greater definition of …
Late Holocene Paleoseismicity Along The Northern Oregon Coast, Mark Edward Darienzo
Late Holocene Paleoseismicity Along The Northern Oregon Coast, Mark Edward Darienzo
Dissertations and Theses
Marsh paleoseismological studies were conducted in four bays (Necanicum, Nestucca, Siletz, and Yaquina) along the northern Oregon coast and compared with completed studies in two other bays (Netarts and Alsea). Coseismically buried peats were identified in all bays, based on 1) abrupt contacts, decreases in organic content, increases in sand content, increases in beach sand, and changes in diatom assemblages, all from the peat to the overlying sediments, 2) distinct sandy layers and key plant macrofossils, such as Triglochin, above the buried peat, and 3) widespread correlation of the buried peats within the bay. The stratigraphy and the ages and …
Hydrogeology Of An Alluvial Aquifer In The Blue Lake Area, East Multnomah County, Oregon, James Mitchell Wilkinson
Hydrogeology Of An Alluvial Aquifer In The Blue Lake Area, East Multnomah County, Oregon, James Mitchell Wilkinson
Dissertations and Theses
This thesis evaluates the hydraulic relationship between the Blue Lake gravel aquifer, the Columbia River, and Blue Lake. Hydrogeology, water levels, and stable isotopes were used to establish these hydraulic relationships.