A5044976513- Hydrology and Sediment Transport Processes
- Fish Ecology and Management Studies
- Hydrology and Watershed Management Studies
- Soil erosion and sediment transport
- Freshwater macroinvertebrate diversity and ecology
- Forest Management and Policy
- Tree Root and Stability Studies
- Wildlife Ecology and Conservation
- Soil and Water Nutrient Dynamics
- Species Distribution and Climate Change
- Forest Biomass Utilization and Management
- Rangeland and Wildlife Management
- Environmental Conservation and Management
- Landslides and related hazards
- Smart Materials for Construction
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Aquatic Invertebrate Ecology and Behavior
- Forest ecology and management
Weyerhaeuser (United States)
2004-2022
Oregon State University
1997
Abstract Stream temperature is a key physical water‐quality parameter, controlling many biological, chemical, and processes in aquatic ecosystems. Maintenance of cool stream temperatures during summer critical for high‐quality habitat. As such, transmission warm water from small, nonfish‐bearing headwater streams after forest harvesting could cause warming downstream fish‐bearing reaches with negative consequences. In this study, we evaluate (a) the effects contemporary management practices...
Abstract: Forest practices have progressively changed over the last 30 years in Pacific Northwest to address water quality concerns. There been some assessments of these new management made at a site scale but very few studies attempted evaluate their efficacy reducing cumulative sediment production watershed scale. Such an evaluation is difficult due spatial and temporal variability delivery transport processes. Due this inherent variability, detecting response changes requires long‐term...
Abstract Transport of fine‐grained sediment from unpaved forest roads into streams is a concern due to the potential negative effects additional suspended on aquatic ecosystems. Here we compared turbidity and concentration (SSC) dynamics in five nonfish bearing coastal Oregon above below road crossings, during three consecutive time periods (“before”, “after construction/improvement”, harvest hauling”). We hypothesized that combined construction/improvement hauling following would increase...
Abstract The Trask River Watershed Study in the northern Oregon Coast Range was designed to examine physical, chemical, and biological effects of contemporary forest management practices on aquatic ecosystems. We measured stream temperature for 11 summers 15 small watersheds, eight which were harvested 2012. Three riparian buffer treatments, varied by landowner, implemented. Using half‐hourly data, we characterized summer water distributions with five percentiles: 5th, 25th, 50th, 75th,...
We adapted Newton's law of cooling to model downstream water temperature change in response stream-adjacent forest harvest on small and medium streams (average 327 ha size) throughout the Oregon Coast Range, USA. The requires measured stream gradient, width, depth upstream control reach temperatures as inputs contains two free parameters, which were determined by fitting data. This reproduces responses within 0.4 °C for 15 16 studied provides insight into physical sources site-to-site...
Abstract Stream temperature changes as a result of forest practices have been concern in the Pacific Northwest for several decades. As this concern, stream protection requirements lands were first adopted early 1970s and become progressively more stringent. While there multiple studies examining effects buffers on water temperature, are few patterns over long periods intensively managed forests. Water upper Deschutes River watershed, Washington has monitored since 1975 represents one longest...
Abstract Almost 90% of the streams listed on EPA's nationwide database as water-quality impaired for temperature are in Northwest. Historic records, monitoring federal wilderness areas Oregon, and available data least-impaired Washington, Idaho show that many these cannot achieve state criteria. Forest management often is cited a cause increased stream above standards. The expectation all forested should be below targets has led to unnecessary listing impaired, wasting limited watershed...
Forest management in riparian ecosystems can significantly alter biotic and abiotic processes streams. harvest without the retention of buffers along small streams affect organic matter dynamics, drive instream characteristics like trophic food webs. To investigate extent to which differing levels tree adjacent channel mitigated changes we examined coarse particulate delivery, transport, retention, as well canopy cover, with four treatments, both before after harvest. Our research was part a...