Search

Search Results

• 51. [Article] The effects of hillslope and fluvial processes on particle size of the stream bed at the watershed, reach and within-reach scales in a fifth-order mountain stream

  This study addressed the effects of hilislope and fiuvial processes on spatial patterns of stream bed particle size at the watershed, reach and within-reach scales. The study was conducted in Lookout Creek ...

  Citation × Citation Citation Abstract Copy Title: The effects of hillslope and fluvial processes on particle size of the stream bed at the watershed, reach and within-reach scales in a fifth-order mountain stream Author: Lambert, Beth C. This study addressed the effects of hilislope and fiuvial processes on spatial patterns of stream bed particle size at the watershed, reach and within-reach scales. The study was conducted in Lookout Creek watershed, a fifth-order, 64 km2 basin in the Western Cascades mountains of Oregon. Stream bed particle size was measured at 25 sites on first- through fifth-order streams. Boulder density was measured from the headwaters of the mainstem of Lookout Creek to its mouth, approximately 16 kilometers of stream length. In Lookout Creek watershed, spatial patterns of particle size result from a hierarchy of hydraulic and hilislope controls. At the watershed scale, hydraulic controls explain around 50% of the variation in d50 and d84. Particle size is related to watershed-scale trends in stream power and stream competence. At the reach scale, debris flows and landslides leave a patchy signature on stream bed particle size. Patches of both high and low boulder density are associated with landslides. A peak in density is associated with a February 1996 debris flow. Hydraulic controls are less evident at this scale, although the degree of reach constraint may affect particle size in fourth- and fifth-order Lookout Creek. At the within-reach scale, hydraulic controls are responsible for around 20% of the observed particle size variation. The effects of the largest flood on record at Lookout Creek were documented at 7 sites that had been sampled before the flood. At the watershed scale, a fining in particle size was observed; this is consistent with the hypothesis that Lookout Creek has an armor layer which the flood disturbed. At the within-reach scale, changes in particle size appeared stochastic, and provided little information about the role of hydraulic controls at that scale. Title: The effects of hillslope and fluvial processes on particle size of the stream bed at the watershed, reach and within-reach scales in a fifth-order mountain stream Author: Lambert, Beth C. This study addressed the effects of hilislope and fiuvial processes on spatial patterns of stream bed particle size at the watershed, reach and within-reach scales. The study was conducted in Lookout Creek watershed, a fifth-order, 64 km2 basin in the Western Cascades mountains of Oregon. Stream bed particle size was measured at 25 sites on first- through fifth-order streams. Boulder density was measured from the headwaters of the mainstem of Lookout Creek to its mouth, approximately 16 kilometers of stream length. In Lookout Creek watershed, spatial patterns of particle size result from a hierarchy of hydraulic and hilislope controls. At the watershed scale, hydraulic controls explain around 50% of the variation in d50 and d84. Particle size is related to watershed-scale trends in stream power and stream competence. At the reach scale, debris flows and landslides leave a patchy signature on stream bed particle size. Patches of both high and low boulder density are associated with landslides. A peak in density is associated with a February 1996 debris flow. Hydraulic controls are less evident at this scale, although the degree of reach constraint may affect particle size in fourth- and fifth-order Lookout Creek. At the within-reach scale, hydraulic controls are responsible for around 20% of the observed particle size variation. The effects of the largest flood on record at Lookout Creek were documented at 7 sites that had been sampled before the flood. At the watershed scale, a fining in particle size was observed; this is consistent with the hypothesis that Lookout Creek has an armor layer which the flood disturbed. At the within-reach scale, changes in particle size appeared stochastic, and provided little information about the role of hydraulic controls at that scale. Close

• 52. [Article] Water over stones : Oregon watershed stories

  The 13 personal essays in Water over Stones: Oregon Watershed Stories explore the author's experiences in dozens of Oregon watersheds. Using the genre of the personal essay, the author, a fifth-generation ...

  Citation × Citation Citation Abstract Copy Title: Water over stones : Oregon watershed stories Author: Oberst, Gail D. The 13 personal essays in Water over Stones: Oregon Watershed Stories explore the author's experiences in dozens of Oregon watersheds. Using the genre of the personal essay, the author, a fifth-generation Oregonian and amateur ecologist, writes about her life and family relationships in stories that are saturated with the waters in which they have lived, logged, fished, and died. These stories are no defense of her family's past. but neither are they a condemnation. Rather, these personal essays are an inside look at the conflicts that arise in the author and in her family relationships when she discovers a protective love of her watersheds, marries an environmental scientist and then tries to negotiate her family's values with environmental values attached to her home waters. This negotiation dives deep into personal waters that flow from childhood anger to religious ecstasy. The author's negotiation of these waters demonstrates the personal essay's unique use as a tool for exploring issues that underlie the science of watershed; specifically: people and their relationships to each other and to their waters. These essays are drawn from the author's experiences in watersheds as wild as Lawson Creek in the Kalmiopsis Wilderness, where her family was lost, and as tame as Ash Creek in the Willamette Valley, where she now lives. Title: Water over stones : Oregon watershed stories Author: Oberst, Gail D. The 13 personal essays in Water over Stones: Oregon Watershed Stories explore the author's experiences in dozens of Oregon watersheds. Using the genre of the personal essay, the author, a fifth-generation Oregonian and amateur ecologist, writes about her life and family relationships in stories that are saturated with the waters in which they have lived, logged, fished, and died. These stories are no defense of her family's past. but neither are they a condemnation. Rather, these personal essays are an inside look at the conflicts that arise in the author and in her family relationships when she discovers a protective love of her watersheds, marries an environmental scientist and then tries to negotiate her family's values with environmental values attached to her home waters. This negotiation dives deep into personal waters that flow from childhood anger to religious ecstasy. The author's negotiation of these waters demonstrates the personal essay's unique use as a tool for exploring issues that underlie the science of watershed; specifically: people and their relationships to each other and to their waters. These essays are drawn from the author's experiences in watersheds as wild as Lawson Creek in the Kalmiopsis Wilderness, where her family was lost, and as tame as Ash Creek in the Willamette Valley, where she now lives. Close

• 53. [Article] MidCoast sixth field watershed assessment : final report

  The study area for this assessment is composed of the Alsea, Salmon, Siletz, Yachats, and Yaquina River watersheds and those watersheds that drain directly to the ocean between Cascade Head and Cape Creek ...

  Citation × Citation Citation Abstract Copy Title: MidCoast sixth field watershed assessment : final report Author: Garono, Ralph J., Brophy, Laura The study area for this assessment is composed of the Alsea, Salmon, Siletz, Yachats, and Yaquina River watersheds and those watersheds that drain directly to the ocean between Cascade Head and Cape Creek at Heceta Head (Ocean Tributaries). Wherever possible, 1:24,000 uniform scale geographic information system (GIS) data that covered the entire study area were used in this assessment. Goals of this study include, (1) a summary of current conditions for each 6th field watershed; and (2) recommendations for monitoring and management actions for prioritized 6th field watersheds. Title: MidCoast sixth field watershed assessment : final report Author: Garono, Ralph J., Brophy, Laura The study area for this assessment is composed of the Alsea, Salmon, Siletz, Yachats, and Yaquina River watersheds and those watersheds that drain directly to the ocean between Cascade Head and Cape Creek at Heceta Head (Ocean Tributaries). Wherever possible, 1:24,000 uniform scale geographic information system (GIS) data that covered the entire study area were used in this assessment. Goals of this study include, (1) a summary of current conditions for each 6th field watershed; and (2) recommendations for monitoring and management actions for prioritized 6th field watersheds. Close

• 54. [Article] Stream channel response to peak flows in a fifth-order mountain watershed

  This investigation explored how the magnitude, style, and frequency of channel adjustments vary spatially and over time within a 5th-order mountain watershed. Historical data sets, including repeated cross ...

  Citation × Citation Citation Abstract Copy Title: Stream channel response to peak flows in a fifth-order mountain watershed Author: Faustini, John M. This investigation explored how the magnitude, style, and frequency of channel adjustments vary spatially and over time within a 5th-order mountain watershed. Historical data sets, including repeated cross section surveys spanning up to 20 years at five sites on 2nd to 5th-order channels and streamflow records spanning up to 50 years, were supplemented by mapping and field reconnaissance activities. The study had two major parts. The first focused on two adjacent, contrasting stream reaches to examine the influence of large woody debris (LWD) on channel morphology and channel response to peak flows in a 3rd-order stream. The upper reach flows through old-growth forest with abundant LWD, while the lower reach was clearcut in 1964-65 and contains little LWD. A 25-year flood in 1996 caused deposition upstream of LWD steps in the old-growth reach alternating with scour between steps, resulting in no net gain or loss of sediment within the reach, while extensive scour and coarsening of the bed occurred in the clearcut reach. These observations suggest that reach-scale channel response was strongly influenced by LWD abundance, but that response at finer scales depends critically on the details of the location and arrangement of LWD. The second part of the study examined the dynamics of channel response to peak flows over two decades, and to two particular large floods during that period, in different portions of the channel network. The cross section data show that the streambed at the study sites is very stable, particularly in lower-order channels. Peak flows that produced detectable change at 90% of cross sections-flows able to cause significant channel adjustments-recur approximately three times as frequently (every 6-7 years) in 4`" to 5`h-order Lookout Creek as in 3rd-order Mack Creek (20-25 years). Flows that produced detectable change at 25% of cross sections are estimated to occur on average every 1.7 to 3.0 years at the study sites. It is estimated that if peak flows of all sizes were increased by only 10% due to anthropogenic impacts (e.g., logging) or climate change, the frequency of peak flows of a magnitude observed to produce significant channel adjustments would increase by approximately 30% in Lookout Creek and 60% in Mack Creek. Title: Stream channel response to peak flows in a fifth-order mountain watershed Author: Faustini, John M. This investigation explored how the magnitude, style, and frequency of channel adjustments vary spatially and over time within a 5th-order mountain watershed. Historical data sets, including repeated cross section surveys spanning up to 20 years at five sites on 2nd to 5th-order channels and streamflow records spanning up to 50 years, were supplemented by mapping and field reconnaissance activities. The study had two major parts. The first focused on two adjacent, contrasting stream reaches to examine the influence of large woody debris (LWD) on channel morphology and channel response to peak flows in a 3rd-order stream. The upper reach flows through old-growth forest with abundant LWD, while the lower reach was clearcut in 1964-65 and contains little LWD. A 25-year flood in 1996 caused deposition upstream of LWD steps in the old-growth reach alternating with scour between steps, resulting in no net gain or loss of sediment within the reach, while extensive scour and coarsening of the bed occurred in the clearcut reach. These observations suggest that reach-scale channel response was strongly influenced by LWD abundance, but that response at finer scales depends critically on the details of the location and arrangement of LWD. The second part of the study examined the dynamics of channel response to peak flows over two decades, and to two particular large floods during that period, in different portions of the channel network. The cross section data show that the streambed at the study sites is very stable, particularly in lower-order channels. Peak flows that produced detectable change at 90% of cross sections-flows able to cause significant channel adjustments-recur approximately three times as frequently (every 6-7 years) in 4`" to 5`h-order Lookout Creek as in 3rd-order Mack Creek (20-25 years). Flows that produced detectable change at 25% of cross sections are estimated to occur on average every 1.7 to 3.0 years at the study sites. It is estimated that if peak flows of all sizes were increased by only 10% due to anthropogenic impacts (e.g., logging) or climate change, the frequency of peak flows of a magnitude observed to produce significant channel adjustments would increase by approximately 30% in Lookout Creek and 60% in Mack Creek. Close

• 55. [Article] Tumalo Creek Watershed analysis

  83 pp. Tables, maps, references, appendices. Presently, the Tumalo Creek Watershed is composed of (2) 6th field sub-watersheds and totals 37,770 acres. Captured January 22, 2008.

  Citation × Citation Citation Abstract Copy Title: Tumalo Creek Watershed analysis Author: Bend-Fort Rock Ranger District (Or.) Year: 2008, 2007 83 pp. Tables, maps, references, appendices. Presently, the Tumalo Creek Watershed is composed of (2) 6th field sub-watersheds and totals 37,770 acres. Captured January 22, 2008. Title: Tumalo Creek Watershed analysis Author: Bend-Fort Rock Ranger District (Or.) Year: 2008, 2007 83 pp. Tables, maps, references, appendices. Presently, the Tumalo Creek Watershed is composed of (2) 6th field sub-watersheds and totals 37,770 acres. Captured January 22, 2008. Close

• 56. [Article] Calapooia Watershed Fish Passage Assessment

  Abstract -- Potential fish passage barriers at road-stream crossings were assessed for tributary streams to the Middle Calapooia River Watershed and the Courtney Creek Watershed. Fish passage guidelines ...

  Citation × Citation Citation Abstract Copy Title: Calapooia Watershed Fish Passage Assessment Abstract -- Potential fish passage barriers at road-stream crossings were assessed for tributary streams to the Middle Calapooia River Watershed and the Courtney Creek Watershed. Fish passage guidelines developed by ODFW were used to determine whether the culverts were fish passage barriers. The assessment includes information on why fish passage is important, field methods, results, recommendations, and an example field sheet and description. Title: Calapooia Watershed Fish Passage Assessment Abstract -- Potential fish passage barriers at road-stream crossings were assessed for tributary streams to the Middle Calapooia River Watershed and the Courtney Creek Watershed. Fish passage guidelines developed by ODFW were used to determine whether the culverts were fish passage barriers. The assessment includes information on why fish passage is important, field methods, results, recommendations, and an example field sheet and description. Close

• 57. [Article] Little Applegate Assessment

  Abstract -- To date, Applegate watershed assessments have focused on 5th field tributary streams that drain more than 50,000 acres. The Little Applegate and Williams Creek Assessments, which are nearing ...

  Citation × Citation Citation Abstract Copy Title: Little Applegate Assessment Abstract -- To date, Applegate watershed assessments have focused on 5th field tributary streams that drain more than 50,000 acres. The Little Applegate and Williams Creek Assessments, which are nearing completion or have been completed, examine watersheds of 72,000 and 52,000 acres respectively. The Little Applegate Assessment includes the topics of Environmental History, Channel Habitat, Hydrology, Sediment, Water Quality, Fisheries, Riparian, Upland Vegetation, and Wildlife. Title: Little Applegate Assessment Abstract -- To date, Applegate watershed assessments have focused on 5th field tributary streams that drain more than 50,000 acres. The Little Applegate and Williams Creek Assessments, which are nearing completion or have been completed, examine watersheds of 72,000 and 52,000 acres respectively. The Little Applegate Assessment includes the topics of Environmental History, Channel Habitat, Hydrology, Sediment, Water Quality, Fisheries, Riparian, Upland Vegetation, and Wildlife. Close

• 58. [Article] USDA report on water and related land resources, Middle Willamette River Basin, Oregon

  Citation × Citation Citation Abstract Copy Title: USDA report on water and related land resources, Middle Willamette River Basin, Oregon Author: USDA Oregon River Basin Survey Party, Oregon. State Water Resources Board, United States. Dept. of Agriculture. Economic Research Service, United States. Soil Conservation Service, USDA Field Advisory Committee, United States. Forest Service Title: USDA report on water and related land resources, Middle Willamette River Basin, Oregon Author: USDA Oregon River Basin Survey Party, Oregon. State Water Resources Board, United States. Dept. of Agriculture. Economic Research Service, United States. Soil Conservation Service, USDA Field Advisory Committee, United States. Forest Service Close

• 59. [Article] Scappoose Bay Watershed Assessment

  Abstract -- The Scappoose Bay Watershed Assessment focuses on habitat conditions for salmonids (salmon, steelhead and trout) in the watershed. The report follows the guidelines of the Oregon Watershed ...

  Citation × Citation Citation Abstract Copy Title: Scappoose Bay Watershed Assessment Abstract -- The Scappoose Bay Watershed Assessment focuses on habitat conditions for salmonids (salmon, steelhead and trout) in the watershed. The report follows the guidelines of the Oregon Watershed Enhancement Manual (WPN 1999). The Scappoose Bay Watershed Assessment presents the existing baseline information on watershed conditions (based on available reports and data) and oral history interviews. A Geographic Information System (GIS) was built to display, analyze and store much of the data. Habitat factors for the decline of salmonids are compared, and major protection and restoration opportunities are identified and prioritized. This Phase I assessment does not generally provide the detailed field reconnaissance and comprehensive field studies that are necessary for proceeding with specific protection and restoration projects. Rather, this assessment lays out the groundwork for a second phase of assessment that bridges the gap between identifying major areas for action and conducting specific projects. Topics included are preliminary analysis of existing data, GIS base map and baseline information, historical habitat conditions, channel habitat typing, fisheries resource and habitat assessment, channel modifications, sediment sources, riparian and wetland conditions, water quality, water use and hydrology, refugia, watershed condition, data gaps, significant legal and public issues, prioritized preservation and restoration, opportunities, and GIS metadata. Title: Scappoose Bay Watershed Assessment Abstract -- The Scappoose Bay Watershed Assessment focuses on habitat conditions for salmonids (salmon, steelhead and trout) in the watershed. The report follows the guidelines of the Oregon Watershed Enhancement Manual (WPN 1999). The Scappoose Bay Watershed Assessment presents the existing baseline information on watershed conditions (based on available reports and data) and oral history interviews. A Geographic Information System (GIS) was built to display, analyze and store much of the data. Habitat factors for the decline of salmonids are compared, and major protection and restoration opportunities are identified and prioritized. This Phase I assessment does not generally provide the detailed field reconnaissance and comprehensive field studies that are necessary for proceeding with specific protection and restoration projects. Rather, this assessment lays out the groundwork for a second phase of assessment that bridges the gap between identifying major areas for action and conducting specific projects. Topics included are preliminary analysis of existing data, GIS base map and baseline information, historical habitat conditions, channel habitat typing, fisheries resource and habitat assessment, channel modifications, sediment sources, riparian and wetland conditions, water quality, water use and hydrology, refugia, watershed condition, data gaps, significant legal and public issues, prioritized preservation and restoration, opportunities, and GIS metadata. Close

• 60. [Article] ODFW Facilities

  Abstract -- Locations of ODFW facilities including headquarters, regional, watershed district, wildlife area, field and research offices as well as screen shops. In some cases, multiple offices may exist ...

  Citation × Citation Citation Abstract Copy Title: ODFW Facilities Abstract -- Locations of ODFW facilities including headquarters, regional, watershed district, wildlife area, field and research offices as well as screen shops. In some cases, multiple offices may exist at a single facility (e.g. Regional office, Watershed District office) Title: ODFW Facilities Abstract -- Locations of ODFW facilities including headquarters, regional, watershed district, wildlife area, field and research offices as well as screen shops. In some cases, multiple offices may exist at a single facility (e.g. Regional office, Watershed District office) Close