• Congratulations for successful Ph.D. Defense

    Dr. Samuel N. Araya

  • Rhizosphere characteristics and functions

    Soil-Plant Relations

  • Dyanmics of soil structure and associated physical soil processes

    Soil Structure

Latest Publications

July 12, 2019

Using Machine Learning for Prediction of Saturated Hydraulic Conductivity and Its Sensitivity to Soil Structural Perturbations

Using machine learning, high‐performance computing, and a large database of over 18,000 soils, we developed new PTFs to predict Ks.

March 21, 2019

On the role of soil water retention characteristic on aerobic microbial respiration

Soil water status is one of the most important environmental factors that control microbial activity and rate of soil organic matter (SOM) decomposition.

September 18, 2018

Hydraulic Redistribution by Native Sahelian Shrubs: Bioirrigation to Resist In-Season Drought

Hydraulic redistribution (HR) by woody vegetation has been proposed as a potential water source for crops in intercropped systems. The native woody shrub,

Updates & News

August 13, 2019

Introducing newly minted PhD: Dr. Samuel N. Araya

Samuel N. Araya successfully defended his dissertation entitled "Soil Structure and Land Surface Controls on Soil Hydraulic Properties and Processes--Applications of Machine Learning, Unmanned Aircraft Systems, and Observations from Long-Term Conservation Agriculture Management"

September 14, 2018

Press Releases: Low-severity wildfires impact soils more than previously believed

Low-severity wildland fires and prescribed burns have long been presumed by scientists and resource managers to be harmless to soils, but this may not be the case, new research shows. According to two new studies, low-severity burns cause damage to soil structure and organic matter in ways that are not immediately apparent after a fire.

May 13, 2018

Congrats Luis and Abraham

Today two of our lab undergraduate assistants graduated with B.S. degree in Earth Systems Science.

Our team

Teamrat A. Ghezzehei


Chelsea Arnold

Research Associate

Jing Yan


Samuel N. Araya

PhD Candidate

Touyee Thao

PhD Student

Jennifer Alvarez

MS Student

Toshiyuki Bandai

PhD Student

Yulissa Perez-Rojas

PhD Student

Fidel Machado

Undergraduate Researcher


SP'19 OFFICE HOURS: THU 1:00-2:20 | SE2-374

ESS 110 Hydrology & Climate

Basics of the hydrological cycle and the global climate system. Fundamentals of surface water hydrology, hydrometeorology, evaporation, precipitation, statistical and probabilistic methods, unit hydrograph and flood routing.


ESS 112 Subsurface Hydrology

Hydrologic and geologic factors controlling the occurrence and use of groundwater on regional and local scales. Physical, mathematical, geologic and engineering concepts fundamental to subsurface hydrologic processes. Introduction to ground-water flow and transport modeling, with emphasis on model construction and simulation.


ES 228 Environmental Modeling

An advanced study of modeling environmental sciences. The first half of the course a survey of common modeling approaches of environmental phenomena. In the second half, student work on individual projects that involve modeling environmental systems or processes. Often students work on problems related to their thesis/dissertation area. (Graduate Only).



Like what you see here? We would love to hear from you if you have interest to join our lab as a student or to collaborate with us. You can find out about admission and degree requirements and offerings by visiting the websites of the Graduate Division and Environmental Systems Graduate Program (links are below).