Index Catalog // ScholarsArchive@OSU

Patterns of sediment accumulation in the Siletz River Estuary, Oregon

Creator:: Pakenham, Anna
Abstract:: Anecdotal evidence suggests many Pacific Northwest estuaries are filling with sediment due to historical logging activities in upstream watersheds. Using the Siletz River estuary as a case study, this research began by analyzing timber harvest and discharge records of the Siletz River watershed, and found that increased timber harvest coincides...
Resource Type:: Masters Thesis
Full Text:: Patterns of Sediment Accumulation in the Siletz River Estuary, Oregon by Anna Pakenham A

Uncertainty in forest road hydrologic modeling and catchment scale assessment offorest road sediment yield

Creator:: Surfleet, Christopher G.
Abstract:: The goal of this study was to advance methods for assessment of forest road hydrologic response and sediment yield at a catchment scale. This research looked at the effect of soil depth estimation on the Distributive Hydrology Soil Vegetation Model (DHSVM), assessed the uncertainty and accuracy of hydrologic modeling of...
Resource Type:: Dissertation
Full Text:: ................................................................................................................... 137 Road Hydrology, Turbidity, and Suspended Sediment Measurements for Oak Creek, Oregon

Investigation of the hydraulic, physical, and chemical buffering capacity of Missoula Flood Deposits for water quality and supply in the Willamette Valley of Oregon

Creator:: Iverson, Justin
Abstract:: The Willamette Silt is a surficial geologic unit composed of successive Missoula Flood Deposits that underlies 3100 km2 (1200 mil) of arable land in the Willamette Valley of Oregon. The Willamette Silt protects the underlying regionally important Willamette Aquifer from agricultural contamination while acting as a semi-confining unit and a...
Resource Type:: Masters Thesis
Full Text:: Master of Science in Geology presented on April 26. 2002. Title: Investigation of the Hydraulic

Mapping and lithologic interpretation of the Territorial Sea, Oregon

Creator:: Agapito, Melinda T.
Abstract:: Seafloor lithologic maps have been widely used to identify conservation sites. In this study, a lithologic interpretation of Oregon's territorial seafloor was created as an interim product in response to the need for a comprehensive lithologic map that will be used in the identification, evaluation and design of marine reserves...
Resource Type:: Masters Thesis
Full Text:: Oregon. The largest of these synclines are filled with sediment, and mostly outside the territorial sea

Effect of salinity on particle release and hydraulic conductivity in sediments

Creator:: Blume, Theresa
Abstract:: Fine particles and colloids, attached to grain surfaces, are abundant in the earth's subsurface. Under certain conditions these particles can be released from the matrix and transported with the mobile phase. One of the mechanisms for sudden particle release is a decrease in groundwater salt concentration below the critical salt...
Resource Type:: Masters Thesis

Constraints of the origin of the middle Pleistocene transition from the glacial sedimentary record of the north-central United States

Creator:: Roy, Martin
Abstract:: This dissertation focuses on the role of ice sheets in the transition during the middle Pleistocene (-1.2 Ma) from 41-kyr glacial cycles to 100-kyr glacial cycles. This research evaluates the hypothesis that the middle Pleistocene transition (MPT) was related to the glacial erosion of a regolith mantle and the subsequent...
Resource Type:: Dissertation

The case for NE-SW extension in northeast Oregon

Creator:: Essman, Jim E.
Abstract:: A zone of diffuse deformation -600 km-wide extending from northern California to Washington has developed resulting from the oblique subduction of the Juan de Fuca plate beneath North America, and the northwestward migration of the Pacific plate. This zone is marked by a change in structural style from transtension in...
Resource Type:: Masters Thesis

An X-radiographic study of the October 2000 Po River flood deposit, Italy

Creator:: Hunt, Louise
Abstract:: During October 2000 the Po River, Italy's largest river, experienced a historically significant flood, producing a deposit on the adjacent prodelta. In December 2000 an event-response study of the deposit was conducted, and during the ensuing 16 months three additional sampling cruises were conducted to study the subsequent evolution of...
Resource Type:: Masters Thesis
Full Text:: environment allowing immediate deposition of Po River sediment load with little dispersal or resuspension

Sediment storage in a headwater valley of the Oregon Coast Range : erosion rates and styles and valley-floor capacitance

Creator:: Casebeer, Nathan E.
Abstract:: This study is part of the effort to quantify sediment budgets and understand the geomorphic evolution of steep mountains where debris flows are the dominant agent of upland erosion. Observations indicate that headwater basins in the Oregon Coast Range (OCR) can store a large amount of sediment, mostly from debris...
Resource Type:: Masters Thesis
Full Text:: . Casebeer for the degree of Master of Science in Geology presented on November 12, 2004. Title: Sediment

Hydrothermal links between ocean plateau formation and global anoxia at the Cenomanian-Turonian boundary

Creator:: Snow, Laura J.
Abstract:: The Cretaceous was a period of extreme climatic conditions accompanied by major perturbations in ocean-atmosphere biogeochemical cycles. One of the most intriguing features is the sporadic interruption of normal marine pelagic sediment deposition by organic rich sediments deposited during oxygen-deficient conditions (ocean anoxic events OAEs). A current model for the...
Resource Type:: Masters Thesis
Full Text:: interruption of normal marine pelagic sediment deposition by organic rich sediments deposited during oxygen

ScholarsArchive@OSU

Patterns of sediment accumulation in the Siletz River Estuary, Oregon

Uncertainty in forest road hydrologic modeling and catchment scale assessment offorest road sediment yield

Investigation of the hydraulic, physical, and chemical buffering capacity of Missoula Flood Deposits for water quality and supply in the Willamette Valley of Oregon

Mapping and lithologic interpretation of the Territorial Sea, Oregon

Effect of salinity on particle release and hydraulic conductivity in sediments

Constraints of the origin of the middle Pleistocene transition from the glacial sedimentary record of the north-central United States

The case for NE-SW extension in northeast Oregon

An X-radiographic study of the October 2000 Po River flood deposit, Italy

Sediment storage in a headwater valley of the Oregon Coast Range : erosion rates and styles and valley-floor capacitance

Hydrothermal links between ocean plateau formation and global anoxia at the Cenomanian-Turonian boundary

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