Index Catalog // ScholarsArchive@OSU

Geographic variations in water quality and recreational use along the upper Wallowa River and selected tributaries

Creator:: McDowell, Theodore R.
Abstract:: Physical, chemical and bacterial water quality parameters of the upper Wallowa River were sampled periodically between July 2, 1978 and June 9, 1979 at nine stream and lake sampling sites. Water upstream from Wallowa Lake was typified by low nutrient concentrations ( generally below detectable limits except for nitrates), low....
Resource Type:: Dissertation
Full Text:: of the Wallowa River reveal that peak discharge generally occurs during June or early July (Figure 5

Salinity as a factor controlling the distribution of benthic estuarine diatoms

Creator:: Martin, John Varick
Abstract:: A two phase investigation was undertaken in an attempt to determine the effects of variations in salinity on the distribution of benthic estuarine diatoms. The estuary studied was that of the Yaquina River which originates in the Coast Range of western Oregon and discharges into the Pacific Ocean at the...
Resource Type:: Dissertation
Full Text:: the Yaquina River which originates in the Coast Range of western Oregon and dis charges into the

From continua to patches : longitudinal patterns in the Middle Fork of the John Day River, Oregon

Creator:: Wright, Kristopher Keith
Abstract:: The Middle Fork John Day River is composed of low gradient, alluvial valley segments separated by constrained, canyon-like reaches, and has a history of multiple land-uses. These factors can alter the physical and biological structure of streams, and disrupt the longitudinal river continuum. I examined habitat, fish, macroinvertebrates, and primary...
Resource Type:: Dissertation
Full Text:: Patches: Longitudinal Patterns in the Middle Fork of the John Day River, Oregon. Abstract Approved

Surface Water and Groundwater Interactions in the Walla Walla River, Northeast Oregon, USA : A Multi-Method Field-Based Approach

Creator:: Gryczkowski, Landon
Abstract:: Surface water and groundwater interactions are a key component in the functioning of stream ecosystems. Exchange of water between the stream and the hyporheic zone creates habitat for aquatic organisms and serves as a control for stream biogeochemical, thermal, and flow processes. This study takes a multi-method field-based approach to...
Resource Type:: Dissertation
Full Text:: -km reach of the river north of Milton-Freewater, OR, USA (figures 1.2 and 1.3), which provides

Ecology of Great Basin Canada goose broods in southcentral Washington

Creator:: Eberhardt, Lester E.
Abstract:: The ecology of female Great Basin Canada geese (Branta canadensis moffitti) and their broods was studied during the rearing seasons of 1983 and 1984 on the Columbia River in southcentral Washington. The movements and activities of 41 adult female geese, marked with radio-transmitters, and their broods were monitored. Adult female...
Resource Type:: Dissertation
Full Text:: Columbia River, there has been considerable discussion of damming, dredging, or channeling this section of

Managed artificial aquifer recharge and hydrological studies in the Walla Walla Basin to improve river and aquifer conditions

Creator:: Petrides Jiménez, Arístides Crisóstomos
Abstract:: This research project focuses on the Walla Walla River Basin located on the east side of the states of Oregon and Washington, USA. With the support and collaboration of the Walla Walla Basin Watershed Council, this work embraces four research topics. The first topic includes the feasibility study of artificial...
Resource Type:: Dissertation
Full Text:: from Nursery bridge to state line, the river runs low or dry in the summer because of upstream

Plankton and nutrient ecology of the Columbia River estuary

Creator:: Haertel, Lois Steben
Abstract:: Monthly samples of nutrients, phytoplankton and zooplankton were taken in the Columbia River estuary over a period of 16 months in order to determine distribution with season and salinity, and interrelationships between plankton and nutrients. Nitrate and phosphate levels in the river water entering the estuary are high in the...
Resource Type:: Dissertation
Full Text:: or Columbia River water. That the process is more complicated than that off Yaquina Bay is mdi

Primary biomass and production processes in the Columbia River estuary

Creator:: Lara-Lara, Ruben
Resource Type:: Dissertation
Full Text:: 45. Freshwater phytoplanktori-salinity encounter conceptual 128 model during low river discharge or

Spatial and temporal patterns of windthrow in the Bull Run Watershed, Oregon

Creator:: Sinton, Diana Stuart
Abstract:: Throughout the 20th century, windthrow has affected forests in the Bull Run watershed, a 26,500 ha basin that is the principal water source for the city of Portland, Oregon. Windthrow from storms in 1973 and 1983 was mapped into a geographic information system (GIS) and compared to a 1931 windthrow...
Resource Type:: Dissertation
Full Text:: or a process, can be investigated at a variety of spatial and temporal scales. Windthrow patterns

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

Creator:: Suzuki, Yasuko
Abstract:: Caspian terns (Hydroprogne caspia) and double-crested cormorants (Phalacrocorax auritus) nest in large colonies on East Sand Island in the Columbia River estuary, the largest known colonies for the two species in the world. Both species of piscivorous colonial waterbirds have been identified as predators with a significant impact on the...
Resource Type:: Dissertation
Full Text:: Science presented on January 13, 2012. Title: Piscivorous Colonial Waterbirds in the Columbia River

ScholarsArchive@OSU

Geographic variations in water quality and recreational use along the upper Wallowa River and selected tributaries

Salinity as a factor controlling the distribution of benthic estuarine diatoms

From continua to patches : longitudinal patterns in the Middle Fork of the John Day River, Oregon

Surface Water and Groundwater Interactions in the Walla Walla River, Northeast Oregon, USA : A Multi-Method Field-Based Approach

Ecology of Great Basin Canada goose broods in southcentral Washington

Managed artificial aquifer recharge and hydrological studies in the Walla Walla Basin to improve river and aquifer conditions

Plankton and nutrient ecology of the Columbia River estuary

Primary biomass and production processes in the Columbia River estuary

Spatial and temporal patterns of windthrow in the Bull Run Watershed, Oregon

Piscivorous colonial waterbirds in the Columbia River estuary : demography, dietary contaminants, and management

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