

Kaweah River Watershed
Projects

Project Scientists

Dr. Juan S. Acero Triana
Dr. Acero Triana is an Assistant Project Scientist in the Department of Environmental Sciences at the University of California, Riverside. He completed his PhD in Agricultural and Biological Engineering with a concentration in Computational Science and Engineering at the University of Illinois at Urbana-Champaign (UIUC) and an MSc in Applied Hydrometeorology at the Russian State Hydrometeorological University (RSHU). Since joining UCR, Dr. Acero Triana has developed a research portfolio centered on understanding ecohydrological processes in highly managed agroecosystems and lake-watershed systems. His work integrates hydrologic models and tools (including SWAT/SWAT+, SWAT-MODFLOW, ParFlow-CLM, and EcoSLIM), machine learning, geospatial analysis, and high-performance computing to investigate groundwater-surface water interactions, mountain system recharge, irrigation-driven hydrologic dynamics, and the impacts of climate variability and land-use change.
He has led and contributed to projects in basins across California, including the Salton Sea and Kaweah River watersheds, focusing on recharge pathways, depletion mechanisms, and drivers of hydrologic change. His research also extends to improving streamflow predictions under climate change using advanced data-driven methods. Broadly, the objective of his work is to develop robust, data-informed decision-support systems that help resource managers and stakeholders assess adaptive strategies to enhance watershed ecosystem services amid environmental change.
Postdoctoral Fellows

Dr. Jason Goulding
Co-advised by Dr. Jirka Simunek, Dr. Scott Bradford, Dr. Menberu Meles
Dr. Goulding is a postdoctoral researcher at the University of California, Riverside. He earned his Ph.D. in Computer Science at UCR with a research focus on multiphase fluid simulations. He joined the Department of Environmental Sciences in 2025, working with Dr. Hoori Ajami, Dr. Jirka Šimunek, and researchers from the USDA Sustainable Agricultural Water Systems Research team. His current focus is on helping the team improve their integrated watershed simulation method that couples the Hydrus, Kineros and MODFLOW programs.

Dr. Bing Li
Dr. Li is a postdoctoral researcher at the University of California, Riverside, specializing in numerical modeling of hydrologic and biogeochemical processes across field, river, and watershed scales. He earned his Ph.D. in Civil and Environmental Engineering from The Pennsylvania State University, with expertise in high-performance environmental modeling tools such as HyporheicFOAM and ATS-PFLOTRAN. His research focuses on integrating hydrology, microbial biogeochemistry, and environmental fluid dynamics to understand complex Earth system interactions.
Co-advised by Dr. Daniel Hirmas

Dr. Taylor M. McDowell
Co-advised by Dr. Daniel Hirmas
Dr. McDowell completed her PhD at the University of Wisconsin-Madison with a focus on soil hydrology in semi-arid aeolian landscapes. In 2024, she started as postdoctoral researcher at Texas Tech University co-advised by Drs. Hoori Ajami and Daniel Hirmas. Her postdoctoral research project focuses on describing urban soils and their hydraulic properties in the LA area to better understand their role in an urban watershed. Ultimately, we hope this knowledge will contribute to the implementation of nature-based solutions with the goal of reducing stormwater runoff and flooding.
Graduate Students

Vaishnavi Varikuti
Co-advised by Dr. Daniel Hirmas
I earned my BS degree in Agricultural Sciences from Acharya N.G. Ranga Agricultural University, India. After graduation, I was highly aspired to study abroad and thus joined South Dakota State University, Brookings to get my MS degree in Plant Sciences. As a PhD student at Texas Tech University under the supervision of Drs. Daniel Hirmas and Hoori Ajami, my research is focused on understanding the effects of interactions between roots, soil, and bedrock on the evolution of soil hydraulic properties, distribution of soil chemical and physical properties, and hydrological functioning of the critical zone.

Eric Wineteer
As an Environmental Sciences PhD student at UC Riverside, I use remotely sensed data to constrain hydrologic models and better understand groundwater recharge. In my previous position as a consulting engineer, I developed improved statistical downscaling techniques to predict the impact of climate change on water quality, and its implications for infrastructure planning. I have extensive experience in high performance computing, particularly in parallel programming with Python. I recived my B.S. in Civil Engineering and my M.S. in Environmental Engineering from the Northeastern University.
Undergraduate Students

Shwetha Anand
Shwetha is currently pursuing an undergraduate degree in Statistics. Her research interests lie in applying statistical techniques for data science applications. As part of the Digital Agricultural Fellowship and NSF project, Shwetha is co-advised with Dr. Juan Acero and applies her data science skills in analyzing streamflow data from the Colorado River Basin.

Lily Caplon-Guin
Lily is an undergraduate student pursuing a bachelor's degree in Bioengineering. She is analyzing USGS well data to quantify groundwater dynamics in the Central Valley. She has previous research experience working in an Entomology lab studying population and community ecology of alpine freshwater habitats where she sorted and identified freshwater invertebrates. Lily hopes to pursue a career relating to research in agricultural sciences in the future.

Refugio Zepeda
As an undergraduate Data Science student at UC Riverside, my research interests include the application of data analysis techniques and machine learning models to make predictive models. As part of the Digital Agricultural Fellowship porject, my focus is on understanding evapotranspiration processes in the Kaweah River watershed in southern Central Valley. I will use Python and GIS data to understand the spatial and temporal variability of evapotranspiration.
Alumni

Dr. Xinying Ling
Postdoctoral Fellow (2023-2025) - Co-advised by Dr. Scott Bradford and Dr. Menberu Meles
Now: Postdoctoral Fellow, Texas Tech University

Jose Angel Pulido
BS in Electrical Engineering, Digital Agricultural Fellow (2023-2024), Lab Assistant (2025)

Dr. Sakiur Rahman
Postdoctoral Fellow (2023-2025) - Co-advised by Dr. Jirka Simunek and Dr. Scott Bradford
Now: Postdoctoral Fellow, University of Florida

Dr. Srishti Gaur
Postdoctoral Fellow (2024-2025)

Hailey Glamore-Scott
BS in Computer Engineering, Digital Agricultural Fellow (2024-2025)

Valerie Gonzales
BS in Environmental Sciences, Digital Agriculture Fellow (2022-2024), Lab Assistant (2025)

Daniel Hernandez
BS in Computer Science, Digital Agricultural Fellow (2024)

Dr. Matthew Amato
Postdoctoral Fellow (2023-2024) - Co-advised by Dr. Daniel Hirmas
Now: Water Resource Scientist, Delaware River Basin Commission
Visiting Scholar, University of California Riverside

Dr. Lin Chen
Postdoctoral Fellow (2021-2024) - Co-advised by Dr. Jirka Simunek and Dr. Scott Bradford
Now: Professor at Northwest Institute of Eco-Environment and Resources, China

Alyssa Duro
MS student (2020-2023) - Co-advised by Dr. Daniel Hirmas
Thesis title: Topographic Correction of Proximally-Sensed Visible Near-Infrared Reflectance Spectra for High Resolution Soil Organic Carbon Mapping

Dr. Sandra Armengol Vall
Postdoctoral Fellow (2021-2023)
Now: Research Scientist at Cartographic and Geological Institute of Catalonia, Spain

Dr. Julio César Pachón Maldonado
Postdoctoral Fellow (2022-2023) -Co-advised by Dr. Daniel Hirmas
Now: Postdoctoral Fellow, University of Sydney, Australia

Dr. Yusen Yuan
Postdoctoral Fellow (2022-2023)
Now: Postdoctoral Fellow, New Mexico State University

Dr. Sanghyun Lee
Postdoctoral Fellow (2022)
Now: Assistant Professor, Jeonbuk National University

Clarissa Carretta
BS in Geology, Junior Specialist (2022)

William Scott Burgess
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BS in Mathematics, Digital Agricultural Fellow (2021-2022)

Maxim Shapovalov
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BS in Earth & Planetary Sciences (2021-2022)
Now: MS student, University of Oregon
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Dr. Adam Schreiner- McGraw
Postdoctoral Fellow (2018-2021)
Now: Research Hydrologist, USDA ARS Missouri

Kiarash Ehsani
MS in Environmental Sciences (2019-2020)
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Aarushi Jha
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MS in Environmental Sciences (2018-2020)
Thesis Title: Application of a Semi-Distributed Hydrologic Model to Understand Hydrologic Flux Partitioning of an Arid, Highly Managed Watershed

Jacob Palmer
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M.Eng in Chemical and Environmental Engineering
Now: PhD Student at Texas State University, San Marco

Dr. Conrad Wasko
Visiting scholar, University of Melbourne

Dr. Clare Stephens
Visiting scholar, University of New South Wales
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Kelly Perez (2019): (UCR, undergraduate researcher, groundwater monitoring)
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Carly Pierce (2018): (UCR, undergraduate researcher, Land cover change)
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Mohamed Eissa (2017): (UCR, undergraduate researcher, Semi-distributed modeling)
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Kyle Fructuoso (2017): (UCR, undergraduate researcher, Seawater intrusion)
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Austin Fimbres (2017): (UCR, undergraduate researcher, Stream flow analysis)
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Huihai Wang (2017): (UCR, undergraduate researcher, Hydrologic modeling)
