As a research hydrologist and geomorphologist, my previous research has generally followed two trajectories: 1) geomorphic response to disturbance including dam removal, surface coal mining, and invasive species and 2) characterizing patterns and controls on flow permanence of intermittent and ephemeral rivers and streams. My current focus includes broadening flow permanence research to the Pacific Northwest region and evaluating changes in sediment and stream water temperature regimes and associated implications on river ecosystem health in Pacific Northwest mountain rivers.
The issue: Salmonid fisheries are an important cultural and economic activity and efforts to support a thriving fisheries industry remain a major priority for the Quileute Tribe on the Olympic Peninsula, Washington. Land use changes can have a profound influence on basin sediment production with direct effects on fisheries (Madej and Ozaki, 2009). Studies are needed to improve...
The Issue: Ongoing channel aggradation has reduced flow conveyance along the lower White River, increasing the flood risk in urban-suburban areas. A refined understanding of the delivery, transport and deposition of sediment in the White River, and how those processes may be influenced by climate and existing dam operations, is necessary in order to plan for future flood...
The Issue: Salmonid fisheries are an important cultural and economic activity and efforts to support a thriving fisheries industry remain a major priority for the Quileute Tribe. Land use changes can have a profound influence on basin sediment production with direct effects on fisheries. A reconnaissance evaluation for water year 1978 indicated that annual sediment loads in...
Geomorphology is the study of the formation and evolution of landforms on Earth's surface. In the Pacific Northwest, volcanoes, tectonic movement, glaciers, rain, snow, wind, vegetation, animals, and people all shape the landscape at different scales of time and space. Of particular interest in the region is the form and processes of rivers, a branch of the science termed fluvial geomorphology...
PRObability of Streamflow PERmanence (PROSPER)
Rivers and streams are constantly changing. Streamflows can change throughout the year and between years due to snowmelt, precipitation, diversions, and return flows. For many streams, these fluctuations determine whether a stream has year-round flow or not. PROSPER is a project initiated to better understand what causes these fluctuations...
Fine-grained sediments in the lower reach of the Sauk River are adversely affecting the health and spawning of Chinook salmon. Climate change and forestry practices have been proposed as suspected causes of a reported increase in sediment loading to the river.
To determine the amount and timing of suspended-sediment loading to the river and possible connections to adverse effects on...
Climate change is increasing the severity and extent of extreme droughts events, posing a critical threat to freshwater ecosystems, particularly with increasing human demands for diminishing water supplies. Despite the importance of drought as a significant driver of ecological and evolutionary dynamics, current understanding of drought...
Kovach, Ryan; Dunham, Jason B.; Al-Chokhachy, Robert; Snyder, Craig; Beever, Erik A.; Pederson, Gregory T.; Lynch, Abigail; Hitt, Nathaniel P.; Konrad, Christopher P.; Jaeger, Kristin; Rea, Alan H.; Sepulveda, Adam J.; Lambert, Patrick M.; Stoker, Jason M.; Giersch, J. Joseph; Muhlfeld, Clint C. The natural wood regime forms the third leg of a tripod of physical processes that supports river science and management, along with the natural flow and sediment regimes. The wood regime consists of wood recruitment, transport, and storage in river corridors. Each of these components can be characterized in terms of magnitude, frequency, rate,...
Wohl, Ellen; Kramer, Natalie; Ruiz-Villanueva, Virgina; Scott, Daniel; Comiti, F.; Gurnell, Angela M; Piegay, Herve; Lininger, Katherine B.; Jaeger, Kristin; Walters, David; Fausch, Kurt D. The U.S. Geological Survey (USGS) has developed the PRObability of Streamflow PERmanence (PROSPER) model, a GIS raster-based empirical model that provides streamflow permanence probabilities (probabilistic predictions) of a stream channel having year-round flow for any unregulated and minimally-impaired stream channel in the Pacific Northwest...
Jaeger, Kristin; Sando, Thomas R.; McShane, Ryan R.; Dunham, Jason B.; Hockman-Wert, David; Kaiser, Kendra E; Hafen, Konrad (Contractor); Risley, John; Blasch, Kyle
The availability of cold-water refugia during summertime river-water temperature maximums is important for cold-water fish species including Endangered Species Act listed salmonids since water temperature influences metabolism, growth, and phenology. The U.S. Geological Survey monitored water temperature at 10 sites approximately evenly-spaced...
Jaeger, Kristin L.; Curran, Christopher A.; Wulfkuhle, Elyse J.; Opatz, Chad C.
The Sauk River is a federally designated Wild and Scenic River that drains a relatively undisturbed landscape along the western slope of the North Cascade Mountain Range, Washington, which includes the glaciated volcano, Glacier Peak. Naturally high sediment loads characteristic of basins draining volcanoes like Glacier Peak make the Sauk River a...
Jaeger, Kristin L.; Curran, Christopher A.; Anderson, Scott W.; Morris, Scott T.; Moran, Patrick W.; Reams, Katherine A.
An interdisciplinary team comprised of USGS and university scientists has developed the Probability of Streamflow Permanence Model or PROSPER which predicts flow permanence for unregulated and minimally impaired streams in the Pacific Northwest.