Streamflow variability can provide valuable information for nonpoint source pollution monitoring program planning. The research papers presented in this thesis examine selected properties of streamflow variability in Oregon to advance its application in regional planning of water quality monitoring programs. The products of this research depict Oregon streams by their relative streamflow variability and evaluate factors that may influence that variability. The three manuscripts examine the application of streamflow variability in the context of regional strategic planning by addressing three related questions: 1.) What is the relationship in Oregon between streamflow variability and watershed size, which is often described as a proxy for streamflow variability?, 2.) What geographic factors in Oregon influence streamflow variability, and are regionalscale factors adequate to efficiently predict streamflow variability on ungaged streams?, and 3.) How is streamflow variability in Oregon affected by seasonal climatic variation? Examination of these questions regarding the behavior of streamflow variability of river systems in Oregon is used to assist in the design of regional and local water quality monitoring programs. Data are from historical records of established US Geological Survey gaging stations. Simple linear regression depicts the relationship of streamflow variability to basin size on a statewide basis and stratified by ecoregions. The results indicate that basin area is not an appropriate indicator of streamflow variability. Multiple regression is used to develop regional models of streamflow variability. Three models are developed for natural flow streams and streams with upstream diversions. Regional and watershed scale variables are evaluated for their potential contributions to the models. Watershed scale variables do not increase the predictive capacity of the models; therefore, the regional scale is appropriate for efficiently modeling streamflow variability. Seasonal investigation of streamflow variability in Oregon develops its application for seasonal monitoring programs. Spatial and temporal analysis reveal a weak relationship between annual and monthly streamflow variability, indicating potential for refined application of the variability index. Streamflow variability is an accessible tool for developing water quality monitoring programs. The regional scale distribution of streamflow variability in Oregon demonstrates the ease at which streamflow variability may be estimated on ungaged streams. / Graduation date: 1998

This study examined the utilization of selected student services by domestic and foreign students in their sophomore, junior, or senior year at Oregon State University during Winter 1994 to find out if differences in awareness, usage, and satisfaction existed between them. It also examined if differences in awareness, usage, and satisfaction existed between groups within the variables of gender, age, and academic status; marital status was included in the questionnaire for demographic profile purposes only. Thirty-one services provided by the six departments under the Vice Provost for Student Affairs were selected for the study. A comparison of quality ratings was made between Student Affairs Departments that used a formal process of evaluation and those that did not. The Student Services Awareness and Usage Questionnaire was developed and used. A sample of 150 domestic students and 150 foreign students were randomly selected, with equal representation by gender and academic status. A total of 193 questionnaires (64%) were returned, 116 from domestic students and 77 from foreign students. The five null hypotheses were tested using either the chi-square test, t-test, or Fisher's exact test. The study found that a majority of domestic respondents (97%) were aware of more services than a majority of foreign respondents (77%). A majority of each group used only about one-third of the services, with the domestic respondents using one service more than the foreign respondents. Seventeen percent of the domestic respondents and 20% of the foreign respondents were satisfied, while 83% of the domestic respondents and 80% of the foreign respondents were neither satisfied nor dissatisfied. Neither group indicated being very dissatisfied, dissatisfied, or very satisfied with any of the services. The findings from the other variables yielded varying results. The use of a formal process of evaluation by some service departments did not result in their obtaining higher quality ratings than the rest. Recommendations for administration and further research were included to address the issues involving student services and how they can be delivered more efficiently and effectively to benefit the university's diverse student population. / Graduation date: 1998

Pre-flood (1995), and post-flood (1996) channel stability surveys were conducted on 22 reaches along Oak Creek, Benton County, Oregon in an effort to note if the flood of February 1996 altered the channel and if the channel stability survey that was being used accurately predicted the channels resistance to change resulting from a flood. The channel stability survey that was used was the method described in the 'Channel Stability Evaluation and Stream Reach Inventory' designed by the USDA Forest Service, Northern Region, in Colorado (Pfankuch, 1978). This was a non-parametric study, based on an opportunity to reoccupy survey locations from a previous study. A model was proposed to describe the 1995 ratings as predictions for change should a flood event occur. This predicted change was compared to the actual change that occurred as a result of the 1996 flood in order to test the surveys ability to accurately predict change. Changes in the survey totals, the 15 channel stability indicator items that compose the survey, and the sediment distribution were evaluated within and between years at the reach, station and stream scale. An increase in the percentage of fine gravel occurred at all scales when post-flood and pre-flood sediment distribution was compared. Except for an increase in fine gravel, the stream remained similar to its pre-flood state. In 1995, the stream's channel stability was rated as 'fair', indicating that a moderate amount of change should take place if a flood occurred. The 1995 predictions for change did not match the actual change observed after the February 1996 flood at the three scales when defined by the survey totals. When independently evaluating the fifteen individual channel stability indicator items, a considerable amount of change was detected at the reach level. Although change occurred in the indicator items at each reach, the stream average for each of the independent indicator items was similar between the two years. This may indicate that, although change occurred at the reach level, the stream maintained its physical diversity after the flood. The survey method was unable to accurately predict changes to Oak Creek incurred by the February 1996 flood when viewed at the entire stream level, yet it may be more applicable at the reach level when viewing specific changes to channel stability indicator items. In general, the Stream Reach Inventory and Channel Stability Evaluation is designed for observational efficiency but does not have sufficient scientific basis or measurement precision to accurately predict the extent or type of channel change. / Graduation date: 1998

The Oregon Youth Conservation Corps (OYCC) is a youth work program created by the Oregon Legislature in 1987. The OYCC provides both summer and year-round employment programs primarily for disadvantaged and at-risk youth. The legislatively defined purpose of the OYCC is to protect, conserve, and improve the natural, historical, and cultural resources of the state, and to increase the education, training, and employment opportunities for participating youth. In addition, youth are given the opportunity to improve work skills and work-related social skills, develop the work ethic, and increase employability. The OYCC's impact on Oregon's resources, such as the improvements made to parks and the enhancement of public recreation areas, has been well documented. What has not been methodically studied are the outcomes of OYCC participation on youths' work skills, social skills, employability, and educational goals. This study examined participant outcomes for 400 of the over 600 youth enrolled in OYCC 1996 summer programs. Summer programs operate in nearly all of Oregon's 36 counties, and programs vary in length from 5 weeks to 10 weeks duration. Crew sizes vary from 4 to 10 participants, and are led by an adult crew leader. Pretest surveys were completed by participants and crew leaders at the beginning of each program. Participants and crew leaders completed posttest surveys again at the end of each program. Retrospective (post-then pre) pretests were also used. Measures were adopted from a Colorado State University evaluation of Youth Conservation Corps (Johnson, Driver, Ross, & Shikiar, 1982) These measures assessed changes in work skills, work-related social skills, educational goals, and potential for future employability. Data were analyzed to determine if outcomes of OYCC participation varied by program length, residential status, or participants' risk status. Investigator-designed measures were used to obtain demographic data. Both the traditional pretest-post test and the retrospective pretest methodologies revealed significant increases in participants' work competence and skills, work attitudes and behaviors, and comfort with diversity among co-workers. Increases were most significant among higher risk youth. Residential programs were particularly effective. Suggestions for future evaluation development and implementation are made. / Graduation date: 1998

A constructed wetland receiving pasture runoff from a dairy in Tillamook, OR was monitored during the winter of 1997-98 in order to estimate coliform treatment efficiency during winter high flow periods. Monitoring occurred during four sampling periods, each lasting 2 to 4 days. Samples were taken every two hours from the inlet and outlet of each of two parallel wetland cells and analyzed for fecal coliform using the standard membrane filtration technique. Flow into the wetland cells was measured using a chart recorder. Dye tests were conducted for each cell during each sampling period in order to estimate residence time, active cell volume, and qualitatively evaluate the flow regime. Removal was calculated by comparing inlet samples with outlet samples offset by the residence time. This residence time offset method was an attempt to compensate for the changing flows and loads common to storm driven non-point pollution sources. Coliform concentrations and flow rates of the dairy pasture runoff varied widely. Concentrations ranged from 10�� cfu/100mL to more than 10��� cfu/100mL. The highest concentrations typically coincided with the first storm flow peak following manure application. The constructed wetland in this study was able to reduce coliform concentrations in dairy pasture runoff by more than an order of magnitude (98%) during winter storm events. Removals observed during a lower flow period in the fall were significantly lower (78%). A statistical examination of literature data in an attempt to determine the influence of commonly reported parameters on coliform removal had mixed results. Regression modeling suggested that the parameters that most influence coliform removal in wetlands are hydraulic overflow rate (HOR) and inlet coliform concentration. The importance of HOR would appear to suggest that an area-dependent process, such as settling, is the dominant removal mechanism in most wetlands. However, since most wetlands have some form of pretreatment to remove settleable material, it is unlikely that coliform is significantly removed by settling. A theortical examination of coliform removal mechanisms in constructed wetlands suggests that filtration, die-off, and solar ultraviolet disinfection are more likely removal processes. / Graduation date: 1999

This qualitative study was designed to identify factors that might affect the psychological and educational wellness of nontraditional students in nontraditional graduate programs in Education. Specifically, informants were selected purposefully from three Oregon State University extended-campus graduate programs in Education. Student informants were working professionals with family obligations. Faculty informants were selected because of their extensive involvement in the delivery and instruction of these programs. The informants shared their experiences and opinions in focus group and in-depth interviews. The initial focus group interview yielded basic concepts and categories that guided subsequent in-depth interviews with nine students and three faculty members. Transcripts of the in-depth interviews, along with focus group data, were crafted into narrative profiles of the informants. Analysis and comparison of the informants' profiles enabled examination of patterns and commonalities that appeared to be present among their experiences. The following conclusions were generated from the findings: 1. Family support and involvement are foundational factors in the attainment of the degree. 2. Financial implications must be of prime concern in the student's preliminary plans to enroll in a graduate program. 3. Wellness, both psychological and physical, can be significantly impacted by preoccupation with the academic demands of the program. 4. Time management is basic to successfully balancing family and career responsibilities and the institutional demands of higher education. 5. Workplace support and the field application of course work are critical elements in maintaining career momentum while undertaking a meaningful learning experience. 6. Institutional and program requirements must be clearly understood by the student at the time of admission. 7. The program coordinator and the student's major professor are the main agents for institutional interface and outcome attainment. 8. Flexibility is required on the part of all stakeholders in these programs. This is especially important in three areas: (a) scheduling, (b) delivery, and (c) curriculum and instruction. 9. The cohort model provides a "second family" that is generally the best coping mechanism within the program. This study has implications for all stakeholders in nontraditional higher education: administrators, faculty, students, and employers. / Graduation date: 1998

The overarching purpose of this study is to examine the communication implications of a self-proclaimed consensual organization (IT) within a classical organizational environment. The literature review of relevant theory and research covers both hierarchical and consensual organizations viewed via the classical, human relations, and system perspectives. The researcher compares organizational theory to practice by using communication to describe a consensual organization. The analyses of the research questions show that the IT organization, although a self-proclaimed consensual organization, does not obtain as many consensual qualities as the organization perceives. Organizational theorists have positioned bureaucracies and consensual organizations at opposite ends of the task-relational continuum. However, the findings from this thesis study suggest that consensual organizations should be positioned much closer to the task-oriented bureaucracies. / Graduation date: 1997

Intermittent, headwater streams recently have been recognized as important components of forest ecosystems and have been provided increased protection by the Northwest Forest Plan. However, few studies have examined their distribution, dynamics, and ecological roles, such as habitat for wildlife. My goal was to provide additional information on the ecology of intermittent streams in the Pacific Northwest. I examined and compared hydrologic, water quality, and physical characteristics of 16 intermittent streams in old-growth and young forest stands in the central Cascade Range in western Oregon. I documented amphibian communities and habitat associations in these streams during spring and summer. I used comparisons of current habitat conditions and amphibian communities between stand types to gain insight into potential impacts of timber harvesting on these stream systems. Of the streams surveyed in old-growth and young forest stands, relatively few (23%) were designated as intermittent based on my definition which included presence of a definable channel, evidence of annual scour and deposition, and lack of surface flow along at least 90% of the stream length. Intermittent streams in old-growth stands exhibited the following characteristics: (1) annual flow pattern in which streams started to dry in May and June and were mostly dry by July; (2) lengthy annual flow durations (range 6-11 months); (3) cool and stable daily stream temperatures; (4) primarily coarse substrates, such as cobbles and pebbles; (5) streamside vegetation comprised of predominantly coniferous overstories, and plant species associated with uplands or dry site conditions, such as Oregon-grape and salal, as well as riparian areas or wet site site conditions, such as Oregon-grape and salal, as well as riparian areas or wet site conditions, such as red alder, oxalis, red huckleberry, and vine maple (Steinblums et al. 1984, Bilby 1988); and (6) low to moderate densities of large wood, mostly moderately- and well-decayed. Study streams in young forest appeared to dry about one to two months later than the streams in old growth but had similar annual flow durations. They also were characterized by higher daily stream temperatures, similar diel fluctuations, finer substrates, more deciduous overstory and herbaceous understory cover, and lower densities of moderately-decayed large wood. Differences in habitat conditions between stand types may be attributed to timber harvesting as well as discrepancies in physiographic and geological factors, such as elevationgradient, and soil type. Amphibian communities in spring and summer were comprised primarily of the Cascade torrent salamander (Rhyacotriton cascadae), Dunn's salamander (Plethodon dunni), and Pacific giant salamander (Dicamptodon tenebrosus). Amphibian communities in streams in young forest stands exhibited different species composition and seasonal patterns in total density from those in old growth. Cascade torrent salamanders and Dunn's salamanders maintained similar densities and biomass between spring and summer by potentially adopting drought avoidance strategies. Species differed in their use of habitat types and associations with habitat features. In general, amphibian species were positively correlated with percent surface flow, water depth, intermediate-sized substrates and negatively associated with overstory canopy cover, elevation, and wood cover. Results of my study suggest that intermittent streams may warrant protection for their potential effects on downstream habitat and water quality and for their role as habitat for aquatic species, such as amphibians. Streamside vegetation should be maintained along intermittent channels to provide shade protection for water temperature regulation and sources of large woody debris and other allochthonous energy input, to help stabilize slopes, and to minimize erosion and sedimentation. At a minimum, intermittent stream channels should receive protection from physical disturbance during timber harvesting operations. However, since intermittent stream systems are highly variable, management should address individual site conditions and vary accordingly. / Graduation date: 1997

Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath juniper canopies, and reduces soil moisture storage. This study assessed understory plant succession, soil nitrogen (N) cycling, litter decomposition, and soil moisture availability following cutting of a western juniper woodland on Steens Mountain, Oregon. Cutting of western juniper reduced below-ground competition for water and N, increasing soil moisture storage and N availability for understory species. Leaf water potentials were less negative, and N concentration and biomass in understory plants were greater in the cut treatment. Understory species responded to improved growth conditions with increased cover, biomass, density, and diversity. In 1993, total understory biomass and canopy cover were 870% and 300% greater, respectively, in the cut treatment than the uncut woodland. Understory succession was dominated by plants present on the site prior to cutting. Results indicated initial that bunchgrass densities of 2 plants/m2 were sufficient for perennial grasses to dominate following juniper cutting. Juniper cutting is an effective method for restoring the understory component in sagebrush rangelands that are currently dominated by western juniper woodland. Nitrogen availability was greatest in cut-interspace locations the first year following treatment and in cut-duff locations in the second year. Nitrification was lowest in cut-slash and woodland-duff locations, areas receiving fresh litter inputs and experiencing lower temperatures than interspace (cut and woodland treatments) and cut-duff locations. Decomposition of juniper litter was two times faster in the cut treatment, however the release of litter N occurred earlier in the woodland. Large inputs of N poor litter from cut juniper slash were hypothesized to have increased microbial demand for N, resulting in immobilization of litter N. Immobilization of litter N may be important in conserving N on sites following cutting. / Graduation date: 1997

Menopause is a critical life-cycle transition for women, and is associated with osteoporosis and cardiovascular disease, leading causes of morbidity and mortality in US women. Efforts to curb symptoms of menopause include HRT and ERT, although conflicting evidence exists linking ERT and HRT with the risk of breast cancer. Physicians attitudes and preferred mode of treatment have been extensively studied, but with the increased utilization of nurse practitioners in the field, a new paradigm is being established. The overall goal of this study was to assess the nurse practitioners knowledge and attitudes about menopause, hormone replacement therapy and estrogen replacement therapy. More specifically, the objectives include to: 1) determine methods of patient education for menopausal women; 2) examine whether attitudes of menopause are predictors of preferred modes of treatment; and 3) determine whether demographic factors of nurse practitioners are predictors of preferred modes of treatment. A random selection of nurse practitioners from the state of Oregon were mailed a self-administered survey along with a stamped, addressed envelope. The questionnaire focused on knowledge of menopausal treatments, attitudes of menopause, continuing education in the menopause research, and methods of patient education. Follow-up surveys were mailed to non-responders at two and four-week intervals following the first mailing. Response rate was 60% with a sample size of 192. Results describe the management practices of nurse practitioners and what influenced their prescribing and management practices. The influences included the following factors: perceptions about adequacy of formal education, continuing education and attitudes about menopause and managing menopause. Only 47.4% of the respondents felt that their formal education in menopause treatment and protocols was adequate. When asked how they treated women, a majority (64.6%) of the nurse practitioners depended on the women and her beliefs about menopause, HRT, and ERT when they considered how they cared for a menopausal women. Sixty-one percent were very likely to take time during a visit to discuss the changes a woman was going through, while 23.7% were most likely to answer questions if the client had any, otherwise leave the introduction of menopause to the client. When contraindications were present, all nurse practitioners were less likely to prescribe both ERT and HRT. A surprising trend was the high number of participants who were uncertain about how they would prescribe when contraindications were present. In summary, this study describes Oregon nurse practitioners attitudes about menopause, the perceived adequacy of their formal education, and likelihood of prescribing ERT and HRT. Since almost 50% of the nurse practitioners felt their education was inadequate in menopause, a systematic analysis of masters level nurse practitioner programs in the area of menopause and menopausal treatments is needed. Ideally, a nationwide survey comparing physicians and nurse practitioners prescribing practices would help quantify differences between the two types of health care providers. / Graduation date: 1997