[Enviro-lunch] Enviro-lunch TODAY! 12-1:15PM PST for Dr. Rose Shillito's seminar, "Soil Water Repellency: The Life and Death of Sorptivity"

[Anna Jurusik]

 [cid:ff646269-baf1-4b87-8395-37fb014cf93a]

We cordially invite you to join us virtually TODAY October 17th, 2022 for Dr. Rose Shillito's talk!


Soil Water Repellency:  The Life and Death of Sorptivity

Dr. Rose Shillito

Physical Research Scientist
at the
U.S. Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, MS
October 17th, 2022

 12:00-1:15PM PST

via

https://ucmerced.zoom.us/j/85854124987

[cid:77b55d67-8c46-4781-a2b0-e32320e7f7bd][cid:3fbcdf0c-6737-4b6b-bd34-9bf7cd2f6575]
Dr. Rose Shillito

Abstract. Soil water repellency is believed to contribute to flooding after wildfires. This is a critical issue as the frequency and size of wildfires is expected to increase, and as the Wildland Urban Interface expands near and into watersheds susceptible to wildfires. Current runoff models can only empirically account for water repellency as no physical representation was known to mechanistically account for the effect of water repellency on infiltration and runoff. Until now. A physics-based model has been developed, which can quantitatively account for the effect of water repellency on the soil hydraulic property of sorptivity. The model was verified in laboratory experiments using a silica sand. Additionally, a methodology for field measurement of sorptivity was assessed. The effect of water repellency on runoff was simulated using a watershed model with data from rainfall following the 2009 Station fire in the San Gabriel Mountains of southern California. Results showed water repellency had a quantifiable effect on runoff production, an effect enhanced by the dry soil moisture conditions common after wildfires. Post-wildfire increases in runoff and erosion are frequently associated with changes in soil water repellency, structure, roughness, and decreased vegetative cover. Understanding and quantifying these effects is critical to the application of numerical models used for post-wildfire flood and debris flow prediction, flood risk and emergency management, and floodplain planning and management.

About Dr. Rose Shillito. Rose Shillito is a Physical Research Scientist at the U.S. Army Corps of Engineers, Engineer Research and Development Center (ERDC) in Vicksburg, MS. Rose has a Ph.D. in Geoscience from the University of Nevada, Las Vegas, a master’s degree in Hydrology and Water Resources from the University of Arizona in Tucson, Arizona, and a bachelor’s degree in Geography with a minor in Soils, Water, and Engineering (SWE) also from the University of Arizona. Professionally, she has worked as a hydrologist for the Pima County Flood Control District in Tucson, Arizona and as a hydrologist with the U.S. Department of Agriculture - Agricultural Research Service. As a hydrologist and soil scientist with the Desert Research Institute in Las Vegas, Nevada, Rose was involved with the assessment of wind and water erosion on contaminated sites some of which had experienced wildfires, and in the development and analysis of measurements for soil health assessment. She has taught undergraduate weather and climate and graduate vadose zone hydrology classes. Rose specializes in arid land critical zone processes including precipitation measurement, soil moisture availability, evapotranspiration, erosion, infiltration, and runoff. Her current research focus concerns wildfire effects on soil and infiltration, subsequent effects on surface flow, flooding and debris flows, and the spatial extent and temporal persistence of post-wildfire effects at the watershed scale.

We hope you'll join us!

Kind regards,
Enviro-lunch coordinators Anna Jurusik and Teamrat Ghezzehei, PhD.
ESS-190 coordinators Justin Yeakel, PhD., Jorge Armando Montiel Molina, PhD., and Carolin Frank, PhD.

P.S. Thank you so much to our last speaker, Dr. Jadson D. P. Bezerra, for his wonderful talk, "The experience of a young Brazilian mycologist in the estimation of the national and global fungal diversity"!


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Fall 2022 Line-up (in progress)



Date

Speaker

Affiliation

9/12/22

Chelsea Arnold, Ph.D.

University of California Merced

9/19/2022

Michel Philben, Ph.D.

Hope College

9/26/2022

Jon P. Rebman, Ph.D.

The Nat, San Diego Natural History Museum

​10/3/2022

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​10/10/2022

Jason Diogo Pereire Bezerra, Ph.D.

Instituto de Patologia Tropical e Saúde Pública, Federal University of Goiás, Goiânia, Brazil

TODAY! 10/17/2022

Rose Shillito, Ph.D.

U.S. Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, MS

"Soil Water Repellency:  The Life and Death of Sorptivity"

*up next! 10/24/2022

Zhi (Luke) Wang, Ph.D.
California State University, Fresno
"The Dew"

10/31/2022

Robin Trayler, Ph.D.

University of California Merced

11/7/2022

Rafael Bello-Bodoy, Ph.D.

Autonomous University of Baja California, Mexico

11/14/2022

Safeeq Khanm Ph.D.

University of California Merced

11/21/2022

Tetsu Tokunaga, Ph.D.

Lawrence Livermore National Laboratory

11/28/2022

Sheng Wang, Ph.D.

University of Illinois Urbana-Champaign

12/5/2022

Rebecca Abney, Ph.D.

University of Georgia

What: An informal and collegial session where faculty, visiting scholars, postdoctoral researchers, staff, and students have the opportunity to discuss their past and/or current research, and more. This year we welcome 80 undergraduate students enrolled in ESS-190 to join the conversation! https://soilphysics.ucmerced.edu/envirolunch.html<https://urldefense.com/v3/__https:/soilphysics.ucmerced.edu/envirolunch.html__;!!DZ3fjg!_cxaM91btptMGOIdckdP0yK2VWD18dbs_kPpkRQLR3FZmy83nHN6kQrTlBj8kgQyYhRhRGMvQcf8lPfl6L6Jqq1qdg$> (website under construction, please pardon any errors)

When: Mondays 12:00p-1:15 pm (PST)

Where: We will host Enviro-Lunch virtually via ZOOM this semester

Who: Our audience typically spans across natural sciences from faculty, students, and staff, but also attracts engineers, social scientists, and more.

How: A ~30-40 min for presentation with ~15-20 min for Q&A/discussion over Zoom. This year we are coordinating with ESS-190, an undergraduate seminar series that will interface with the seminar. (note: only ESS-190 students will meet in person)

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