School of Earth, Energy & Environmental Sciences
Showing 11-20 of 49 Results
Professor of Geological Sciences, Emeritus
Current Research and Scholarly InterestsRESEARCH
Efforts were focused on detailed field characterization and comprehensive physics-based numerical simulation; see PUBLICATIONS
Courses were focused on hydrologic processes & applied numerical modeling:
@ Leland Stanford Junior University
Environmental Problems (GES43Q), Environmental Earth Sciences I & II (GES130 & GES131), Soil Physics & Hydrology (GES130), Hydrologically-Driven Landscape Evolution (GES131), Geomorphology (GES140), Hydrogeology (GES230), Surface & Near-Surface Hydrologic Response (GES237, CEE260B), Soil Physics (GES238), Advanced Geomorphology (GES239), & Hydrogeology Seminar (GES332B)
@ University of California - Berzerkeley
Wildland Hydrology (FRM109), Soil Hydrology (SS150), Soil Science Seminar (SS235), Vadose Zone Modeling (SS250), & Hillslope Hydrology (SS251)
@ University of Hawaii - Manoa
Groundwater Geology (GG455), Groundwater Contamination (GG654), Groundwater Modeling (GG655), & Transport Modeling (GG656)
US ARMY, stationed (chronologically) @ Fort Knox (KY), Fort Eustis (VA), Hunter Army Airfield (GA), Vien Long Army Airfield (RVN), Can Tho Army Airfield (RVN), Bien Hoa Air Base (RVN), Fort Carson (CO), & Fort Benning (GA)
Professor of Geological and Environmental Sciences, Emeritus
Current Research and Scholarly InterestsPetrochemical processes and tectonics of ultrahigh-pressure metamorphic terranes
Ph.D. Student in Petroleum Engineering
Current Research and Scholarly InterestsMy current research project is a part of geomechanics project, focusing on the geomechanics in naturally fractured porous media. The idea here is to explore the effect of fracture deformation, caused by different processes, on fluid flow, i.e. permeability and porosity changes effects, and to develop stable algorithms for this process. As a starting point we restricted ourselves to a simple case of single-phase flow with linear elastic reservoir deformation and are trying to solve the fully-coupled problem to investigate influence of introducing fractures on deformations and consequently, on fluid flow.
Ph.D. Student in Geophysics
Current Research and Scholarly InterestsTsunamis are some of the most devastating natural disasters than can occur. In just the last 15 years, two tsunamis - the 2004 Indian Ocean tsunami and the 2011 Japan tsunami - killed hundreds of thousands of people and destroyed billions of dollars of property. Despite the importance of understanding these dangerous waves, there is still much we do not understand about how tsunamis are generated.
The largest tsunamis are caused by megathrust earthquakes in subduction zones, when shallow coseismic slip between tectonic plates causes the seafloor to deform, uplifting the ocean surface and initiating a tsunami. Tsunamis can also be caused by earthquakes with smaller magnitude that are more efficient at generating tsunamis. These are called “tsunami earthquakes,” and they may result from slip along high angle splay faults or through a very compliant wedge of sedimentary materials in the trench.
When an earthquake generates a tsunami, it also excites a wide range of fast-propagating seismic and ocean acoustic waves, some of which get trapped in the ocean and may contain valuable information about the size of the tsunami. These trapped waves could potentially be useful for improving tsunami early warning systems.
To better understand these types of problems, we use numerical models that fully couple dynamic rupture on the fault to the elastic response of the earth and ocean. This means that we can model the full seismic, ocean acoustic, and tsunami wavefield that results from a subduction zone earthquake. This way we can explore and investigate some of the complexities of tsunami generation.