Wednesday 4 PM Burt 193 and Zoom—Speaker Alan Kasprak on Glen Canyon Dam
Hi all, we have a great line up of speaker’s this quarter for our Spring Water Resources Science series. This series is co-organized with Portland State University and the US Geological Survey Oregon Water Science Center. All talks this quarter will be at 4 PM on Wednesdays in Burt Hall room 193 and on zoom. Please join us! This week's speaker on April 10th is Alan Kasprak, a Research Physical Scientist with the US EPA in Corvallis. Dr. Kasprak is new to Corvallis, he was last at Fort Lewis College in Durango, Colorado. He has degrees in Watershed Sciences, Earth Sciences, and Geology and Geophysics. His talk title is "Flow alteration, river valley morphology, and the influence of Glen Canyon Dam on sediment availability along the Colorado River in Grand Canyon." A description is below. Changes in the magnitude, duration, and timing of streamflow affect the entirety of watersheds, from the channel itself to upland landscapes far from the river. In this seminar, I'll detail how hydrologic alteration, driven by the construction and operation of Glen Canyon Dam on the Colorado River, has led to cascading impacts on upland and riparian landscapes and ecosystems throughout Grand Canyon. A particular focus will be placed on the use of remote sensing techniques, including sonar, lidar, and photogrammetry for monitoring and predicting sediment connectivity and landscape change in a drastically altered hydrologic setting. I'll additionally detail alternative flow regimes and future opportunities for hydrologic restoration that may lead to ecosystem recovery at river corridor scales in one of America's iconic landscapes. Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) Download a Zoom calendar invite at: https://oregonstate.zoom.us/meeting/tJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42/ics... See you Wednesday! Alyssa ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, we have a great line up of speaker’s this quarter for our Spring Water Resources Science series. This series is co-organized with Portland State University and the US Geological Survey Oregon Water Science Center. All talks this quarter will be at 4 PM on Wednesdays in Burt Hall room 193 and on zoom. Please join us! Upcoming speakers are listed below. This week's speaker on April 17th is Renee Brooks, Ecohydrologist with the US EPA in Corvallis. The talk title is "Assessing the condition of the Nation’s waters: How can stable isotopes help?" Description: Stable isotope ratios integrate, indicate, record, and trace fundamental processes in hydrology and ecology. Stored within the atoms of samples, stable isotope ratios of specific elements unlock stories about ecological processes that impact water quality and quantity. We utilize that power to help EPA assess the condition of the nation’s waters through the National Aquatic Resource Surveys (NARS). Each summer, the NARS program assesses over 1000 sites, but only spends one day at a site. By measuring isotopic ratios in NARS samples, we gain key insights into hydrologic water balances, and sources and processes affecting nitrogen cycling. In this seminar, I will share some of those insights. We have found that measuring isotopic ratios is a low-cost and efficient means to measure critical processes across the nation that would be difficult and costly to measure otherwise. Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) Download a Zoom calendar invite at: https://oregonstate.zoom.us/meeting/tJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42/ics... Future talks: April 24- Claire Masteller, Washington U. (St. Louis) | Virtual | TBA May 1- Mong-Han Huang, U. Maryland | Virtual | Critical zone below and above the knickpoints of a plateau in Puerto Rico May 8- Miranda Fram, USGS | In-Person | Quality of groundwater used for drinking water supplies in California May 15- Dalton Hance, USGS | TBA | TBA May 22- Seulgi Moon, UCLA | Virtual | TBA May 29 - Liam Schenk, USGS | In-Person | TBA June 5 - Water JEDIs, OSU | In-Person | TBA See you Wednesday! Alyssa ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, Please join us for this week's installation of the joint PSU/OSU/USGS water science seminar Wednesday at 4:00pm. The speaker is Claire Masteller from Washington University in St. Louis, and she'll be talking about erosion in gravel bed rivers. Please see below for the talk title and short description, followed by the usual zoom meeting info. She will be joining us via Zoom. Please join us in Burt 193 if you are on campus. Thanks! Alyssa Causes and consequences of dynamic erosion thresholds in gravel bed rivers Rivers transmit environmental signals across landscapes. In the wake of a changing climate, predicting river channel response to variations in flow magnitude and flood frequency is of significant importance for floodplain communities and ecosystems. As these environmental perturbations propagate across a drainage basin, it’s important to consider the role of prior flow history in a channel when predicting its future evolution. However, widely used models for fluvial sediment transport currently do not integrate these history effects. This omission represents a fundamental, outstanding knowledge gap in earth surface processes. To address this knowledge gap, In this talk, I will focus on the process of bedload sediment transport in gravel-bed rivers, where memory effects are observed over a variety of timescales. I will focus on the link between flood magnitude and frequency and resultant variability in particle scale erosion thresholds. I will discuss the implications of a history-dependent threshold for motion with regard to prediction of bedload transport rates, as well as connections to alluvial channel morphology and dynamic river response to climate change and other perturbations. Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fj%2F98016362270%3Fpwd%3DSUVMTlVJRGp5bGszOFVJRWZJSFJ4dz09&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cf691e2877a88435d73a308dc62eea6e2%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638494024406168396%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=pObiMP7vMXRaR8NxTioGBL6apBZ%2BZRhpTOp3qinBBUQ%3D&reserved=0> Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) Download a Zoom calendar invite at: https://oregonstate.zoom.us/meeting/tJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42/ics... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fmeeting%2FtJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42%2Fics%3FicsToken%3D98tyKuCgrjosGdKXsh6HRow-Aoj4M-nwpnpBgqduuBrJJBpXaCD_JdcTAqhTEork&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cf691e2877a88435d73a308dc62eea6e2%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638494024406182718%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=5NBebgq6YQXeglMXLCfFPzB97uD8vuC1rPg9fyeU090%3D&reserved=0> ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, Please join us for this week's installation of the joint OSU/PSU/USGS water science seminar Wednesday at 4 PM in Burt 193 and on Zoom. The speaker is Mong-Han Huang from the University of Maryland. He will be talking about the Critical Zone in Puerto Rico. Please see below for the talk title and short description, followed by the usual zoom meeting info. The speaker will be joining us by Zoom. Please join us in Burt 193 if you can. Thanks! Alyssa Title: A novel near-surface geophysics approach to constrain material porosity and moisture within critical zone structure in central Puerto Rico Summary: Near-surface geophysics has been widely used in Critical Zone (CZ) research for imaging subsurface properties related to material type, porosity, and moisture distribution. Seismic velocity inverted from active source seismic surveys is commonly used for inferring thickness of regolith, while electrical resistivity can be a proxy for material saturation. Because material porosity and water content both contribute to seismic velocity and resistivity, individual inversions of seismic velocity or resistivity alone yield ambiguous results where the trade-off between moisture and porosity is difficult to interpret. Here we develop a Bayesian joint inversion technique with reverse-jump MCMC using seismic refraction (SR) and electrical resistivity (ER) to simultaneously constrain porosity and water saturation. This method utilizes a transdimensional hierarchical reverse-jump Markov Chain Monte Carlo (rj-MCMC) approach in a Bayesian framework, which creates an ensemble of 2D porosity and moisture models that can fit both the observed P-wave arrivals and the differential electrical potential measurements at a higher likelihood. It provides a better understanding of the plausible models and the uncertainty associated with the data. We conduct several SR and ER surveys across a differentially weathered and incised plateau in Utuado, Puerto Rico. We find a relatively shallow (<15 m), laterally heterogeneous regolith layer along the plateau escarpments, consistent with active weathering of fresh bedrock that was visible in both the active channel and at shallow soil depths. On the low-relief plateau, regolith is commonly more homogeneous, thicker than 20 m, and exhibits a deep groundwater table roughly at the saprolite-bedrock interface. Plateau hillslopes have a uniformly higher porosity and a uniformly lower moisture content than escarpment hillslopes, indicating that they tend to dry out between hydrologic events. These hillslope weathering patterns are consistent with theoretical models of transient critical zone evolution for granitic landscapes and have implications for both hillslope hydrology and slope stability. Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fj%2F98016362270%3Fpwd%3DSUVMTlVJRGp5bGszOFVJRWZJSFJ4dz09&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cf0555dae99184382b5ef08dc688d08f3%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638500202204876224%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=m%2BavMZPFr5etqw37iTd%2FMEWa48TGSTa7S23AGwG9ezg%3D&reserved=0> Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) Download a Zoom calendar invite at: https://oregonstate.zoom.us/meeting/tJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42/ics... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fmeeting%2FtJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42%2Fics%3FicsToken%3D98tyKuCgrjosGdKXsh6HRow-Aoj4M-nwpnpBgqduuBrJJBpXaCD_JdcTAqhTEork&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cf0555dae99184382b5ef08dc688d08f3%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638500202204886569%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=Cs3O5JNjvGbmggAhx5IDYXIEQDZxTglPzN0Ij5gXe0I%3D&reserved=0> ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, Please join us for this week's installation of the joint OSU/PSU/USGS water science seminar Wednesday at 4 PM in Burt 193 at OSU and on Zoom. The speaker is Miranda Fram, Program Chief for Statewide and National Water Quality Assessments for the US Geological Survey in California. Her talk is titled, Quality of groundwater used for drinking water supplies in California. The speaker will be joining us in person. Please join us in Burt 193 if you can. Thanks! Alyssa Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fj%2F98016362270%3Fpwd%3DSUVMTlVJRGp5bGszOFVJRWZJSFJ4dz09&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cf0555dae99184382b5ef08dc688d08f3%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638500202204876224%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=m%2BavMZPFr5etqw37iTd%2FMEWa48TGSTa7S23AGwG9ezg%3D&reserved=0> Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) Download a Zoom calendar invite at: https://oregonstate.zoom.us/meeting/tJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42/ics... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fmeeting%2FtJwtdu-rqDkoHdSDeLGZdjCisU1PzLb2TN42%2Fics%3FicsToken%3D98tyKuCgrjosGdKXsh6HRow-Aoj4M-nwpnpBgqduuBrJJBpXaCD_JdcTAqhTEork&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cf0555dae99184382b5ef08dc688d08f3%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638500202204886569%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=Cs3O5JNjvGbmggAhx5IDYXIEQDZxTglPzN0Ij5gXe0I%3D&reserved=0> ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, Please join us this week for the joint OSU/PSU/USGS water science seminar Wednesday at 4 PM in Burt 193 or on Zoom. The speaker is Seulgi Moon from UCLA (https://faculty.epss.ucla.edu/~sgmoon/ <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Ffaculty.epss.ucla.edu%2F~sgmoon%2F&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cbf3116703b844a8de9f108dc78dd956d%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638518140291347767%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=wR%2B26WDSxLx%2B%2B%2Fvp3pyVnijBMRTU3tzjG%2ByhrPNUG10%3D&reserved=0>), and her talk title and description are: Bedrock Weathering in the Critical Zone: Influencing Subsurface Hydrology and Landslide Bedrock weathering in the deep critical zone provides pathways for water and life in the subsurface, determines groundwater flows and storage, and influences soil nutrient supply, and natural hazards such as landslides. Despite its importance, the deep critical zone is often excluded from slope stability models. In this talk, I will demonstrate how critical zones, influenced by near-surface stress fields, control bedrock fractures, subsurface hydrology, and landslides. Our work indicates that present-day stress fields may influence the relative abundance of open fractures near the surface and at depths of hundreds of meters, preparing rocks for further weathering. Additionally, spatial variations in bedrock weathering produce measurable changes in rock strength and groundwater flows, which have significant implications for landslide hazards. She will be presenting from PSU. We will have the Zoom feed going in Burt 193 and have snacks. Here is the usual zoom meeting info: Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... <https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Foregonstate.zoom.us%2Fj%2F98016362270%3Fpwd%3DSUVMTlVJRGp5bGszOFVJRWZJSFJ4dz09&data=05%7C02%7Calyssa.shiel%40oregonstate.edu%7Cbf3116703b844a8de9f108dc78dd956d%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C638518140291359846%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=KaxJRRavvy8SDOCfQ0%2FBC%2BCbXPeVKI%2Fm3kYxhvBlzlA%3D&reserved=0> Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, Please join us this week for the joint OSU/PSU/USGS water science seminar Wednesday at 4 PM in Burt 193 and on Zoom. The speaker is Liam Schenk from USGS (https://www.usgs.gov/staff-profiles/liam-schenk), and his talk title and description are: Klamath dam removals: early observations from water quality and suspended sediment monitoring. This presentation will provide a short background on the dam removal project and current timelines in the removal process, followed by a presentation of turbidity, suspended sediment, and dissolved oxygen data during the initial drawdowns of the three remaining reservoirs from Jan-Mar 2024. He will be presenting remotely. We will have the Zoom feed going in Burt 193 at OSU and have snacks. Here is the usual zoom meeting info: Join Zoom Meeting (the same each week) https://oregonstate.zoom.us/j/98016362270?pwd=SUVMTlVJRGp5bGszOFVJRWZJSFJ4dz... Meeting ID: 980 1636 2270 Password: WRS2024 Phone dial in: +1 971 247 1195 US (Portland) Thanks! Alyssa ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
Hi all, We are canceling seminar tomorrow. The panel didn’t come together, week 10 is a busy time for folks. Before signing off for the summer, we want to thank all of our great speakers and everyone for their participation this quarter. We also want to thank our partners at the USGS Oregon Water Science Center in Portland and at Portland State University for helping to bring you this great line up of speakers! Wishing everyone a wonderful summer! Alyssa ________________________________ Alyssa E. Shiel Associate Professor College of Earth, Ocean, and Atmospheric Sciences Oregon State University 104 CEOAS Administration Bldg. Corvallis, OR 97331 (541) 737-5209 alyssa.shiel@oregonstate.edu Pronouns: she, her, hers
participants (1)
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Shiel, Alyssa E