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Qualifying Exam: Valeria Sobolevskaia, 5/25 @ 3 p.m.

May 25 @ 3:00 pm - 5:00 pm CDT

Qualifying Exam:Valeriia Sobolevskaia

 

Date: Wednesday, May 25th, 2022
Time: 3:00 p.m.

Zoom Link: https://riceuniversity.zoom.us/j/3609157539?pwd=OTVjcjJ1N2FBZkNueHcrRStCTjJCUT09

Meeting ID: 360 915 7539

Passcode: 871708

 

Proposal Briefs:

 

 

Proposal 1:

 

Monitoring of the Gulf coast aquifer system: an alternative geophysical perspective

Freshwater is one of the key natural resources critical for human survival. Groundwater provides about a third of all freshwater consumed globally, however, this number will likely grow as surface freshwater resources become less reliable due to climatic and anthropogenic impacts. About a third of the world’s largest aquifer systems are already in distress and the key underlying reasons for this are man-made. Hence, there is an urgent need in the development of regulations and systematic, long-term, large-scale monitoring and modelling techniques to protect and preserve clean water supply and ensure its sustainable development. In this proposal, I will address the question of aquifer monitoring and modeling using geophysical tools. I will focus on seismic data that allow to monitor aquifer behavior locally and on regional scale. With the help of collected field data, I will attempt to create and calibrate a model that can predict a potential response of the Gulf coast aquifer system to forthcoming climate events and human activities. If successful, the proposed monitoring technique together with a rock physics model can become an efficient tool for aquifer management that will help to address water supply concerns.

Proposal 2:

 

Understanding matric potential effect using seismic velocity

Partial saturation is an inherent feature of near-surface regions that gives rise to matric potential effect, i.e., negative pore water pressure due to capillary and adsorptive forces. Matric potential plays crucial role in understanding soil biodynamics and elastic response, yet it is often ignored and remains understudied. One of the main reasons behind that is challenges associated with its measurement.  In this proposal I suggest using seismic method to monitor temporal and spatial variations in soil moisture and matric potential and characterize their interdependence. Using data from a controlled lab experiment I propose to test a theoretical model that captures physical processes in partially saturated rocks and then apply the same method in a small-scale field experiment. If successful, this approach will provide an alternative method to obtain spatial matric potential distribution with improved accuracy and resolution.

Details

Date:
May 25
Time:
3:00 pm - 5:00 pm CDT
Event Categories:
,

Venue

Keith-Wiess Geological Labs 123
Rice University, 6100 Main Street
Houston, Massachusetts 77005
+ Google Map
Phone:
7133484880

Details

Date:
May 25
Time:
3:00 pm - 5:00 pm CDT
Event Categories:
,

Venue

Keith-Wiess Geological Labs 123
Rice University, 6100 Main Street
Houston, Massachusetts 77005
+ Google Map
Phone:
7133484880

For outside visitors, the best way to get to our department is to come in on Rice Blvd and turn left into entrance 20 (intersection of Rice and Kent St.). At the stop sign, you will see a visitor parking lot on your right.  From there, walk east to the department.  The google map below shows exactly where our building is.