Sooyeon Yi, Ph.D.

Sooyeon Yi, Ph.D.

Postdoctoral Researcher at UC Berkeley
Assistant Professor of Hydrology at California State University, Chico (Jan 2026)

Publications

See full publications below.

Journal Paper (Published)

  1. Lee, E.; Ji, J., Yi, S., Lee, S., Yoon, J., Yi, J. (2025) Developing resilient reservoir system operations: A simulation approach incorporating rule curve. Water Resources Mangement. https://doi.org/10.1007/s11269-025-04280-w
  2. Lee, E., Yi, S., Ji, J., Hong, J., Lee, S., Yoon, J., Yi, J. (2025) Development of reservoir operation model determining the pre-release strategy for the flood events. Journal of Hydroinformatics. http://doi.org/10.2166/hydro.2025.262
  3. Yi, S., Kondolf, G.M. (2024). Environmental planning and the evolution of inter-basin water transfers in the United States. Front. Environ. Sci. 12:1489917. https://doi.org/10.3389/fenvs.2024.1489917
  4. Yi, S., Yi, J. (2024). Reservoir-based flood forecasting and warning: deep learning versus machine learning. Appl Water Sci 14, 237. https://doi.org/10.1007/s13201-024-02298-w
  5. Yi, S. (2024). Water Transfer Energy Efficiency Index for inter-basin water transfer projects. Water and Environment Journal, 38(3), 535–547. https://doi.org/10.1111/wej.12929
  6. Yi, S., Kondolf, G. M., Sandoval-Solis, S., & Dale, L. (2024). Groundwater Level Forecasting Using Machine Learning: A Case Study of the Baekje Weir in Four Major Rivers Project, South Korea. Water Resources Research, 60, e2022WR032779. https://doi.org/10.1029/2022WR032779
  7. Lee, E., Ji, J., Lee, S., Yoon, J., Yi, S., & Yi, J. (2023). Development of an Optimal Water Allocation Model for Reservoir System Operation. Water, 15(20), 3555. https://doi.org/10.3390/w15203555
  8. Lee, S., Choi, Y., Ji, J., Lee, E., Yi, S., & Yi, J. (2023). Flood Vulnerability Assessment of an Urban Area: A Case Study in Seoul, South Korea. Water, 15(11), 1979. https://doi.org/10.3390/w15111979
  9. Choi, Y., Ji, J., Lee, E., Lee, S., Yi, S., & Yi, J. (2023). Developing Optimal Reservoir Rule Curve for Hydropower Reservoir with an add-on Water Supply Function Using Improved Grey Wolf Optimizer. Water Resources Management. https://doi.org/10.1007/s11269-023-03478-0
  10. Chae, H., Ji, J., Lee, E., Lee, S., Choi, Y., Yi, S., & Yi, J. (2022). Assessment of activating reservoir emergency storage in climate-change-fueled extreme drought. Water, 14(20), 3242. https://doi.org/10.3390/w14203242
  11. Yi, S., Kondolf, G. M., Sandoval-Solis, S., & Dale, L. (2022). Application of machine learning-based energy use forecasting for inter-basin water transfer project. In Water Resources Management. https://doi.org/10.1007/s11269-022-03326-7
  12. Yang, L., Bai, X., Zheng Khanna, N., Yi, S., Hu, Y., Deng, J., Gao, H., Tuo, L., Xiang, S., & Zhou, N. (2018). Water evaluation and planning (WEAP) model application for exploring the water deficit at catchment level in Beijing. Desalination and Water Treatment, 118, 12–25. https://doi.org/10.5004/dwt.2018.22332

Journal Paper (Under Second Round of Review)

  1. Lee, S., Ji, J., Yi, S., Lee, E., Yoon, J., Yi, J. Predicting streamflow in ungauged basins using deep learning algorithms. Applied Water Science.

Journal Paper (Under First Round of Review)

  1. Yi, S., Yoon, J., Lee, C., Lee, Lee, S., Ji, J., Lee, E., Yi, J. Advancing flow duration curve prediction in ungauged basins using machine learning and deep learning. Journal of Hydrology: Regional Study.
  2. Lee, C., Lee, S., Yi, S., Ji, J., Lee, E., Yoon, J., Yi, J. Estimation of minimum inflow time series under reservoir system operation. Journal of Water and Climate Change.
  3. Yoon, J., Ji, J., Lee, E., Yi, S., Lee, S., Yi, J. Analysis of water supply contribution from a hydropower generation reservoir. Journal of Water Resources Planning and Management.
  4. Karimizadeh, K., Yi, S., Yi, J. Performance analysis of climate models (CMIP6) in simulating climate parameters and projection of climatic and hydrological parameters’ trends. Water Resoruces Management.
  5. Lee, E., Ji, J., Lee, S., Yi, S., Yoon, J., , & Yi, J. Eunkyung Hydropower Efficiency and Sustainability Index: A New Framework for Evaluating Hydropower Performance. Applied Energy.
  6. Yoon, Yi, S., J., Ji, J., Lee, E., Lee, S., Yi, J. Assessing Downstream Impacts of Multipurpose Operation. Water.

Journal paper (Preparation)

  1. Yi, S., Stanford, B., Yarnell, S., Murdoch, L., Gilbert, J., Grantham, T. Evaluating Environmental Flows in the Central Valley Under Various Management Scenario. Journal of Environmental Sciences.
  2. Yi, S., Sandoval-Solis, S. Reservoir water balance simulation model using machine learning and deep learning algorithms. Journal of Hydrology.
  3. Lee, E., Ji, J., Yi, S., Lee, S., Yoon, J., Yi, J. Enhancing flood control and water management efficiency. Scientific Report.

Technical Report

  • Lisa, T., Kilduff, P., Sandoval-Solis, S. Yi, S., Modeling Tool to Assess and Mitigate the Effect of Small Hydropower on Stream Fishes in Changing California Climate, California Energy Commission, Online Report. June 2015.
  • Radke, J., Biging, G., Roberts, K., Schmidt-Poolman, M., Foster, H., Roe, E., Ju, Y., Lindbergh, S., Beach, T., Maier, L., He, Y., Ashenfarb, M., Norton, P., Wray, M., Alruheili, A., Yi, S., Rau, R., Collins, J., Radke, D., Coufal, M., Marx, S., Gohar, A., Moanga, D., Ulyashin, V., Dalal, A., 2018. Assessing Extreme Weather-Related Vulnerability and Identifying Resilience Options for California’s Interdependent Transportation Fuel Sector (Technical Report No. CCCA4- CEC-2018– 012). State of California Energy Commission.

Book Chapters

  • Lund, J., Hui, R., Escriva, A., Porse, E., Adams, L., Connaughton, J., Kasuri, L., Lord, B., Siegfried, L., Thayer, R., Sandoval-Solis, S., Yi, S. Reservoir operation design. Chapter 124, Handbook of Applied Hydrology, February 2015.
  • Yi, S., Yi, J. Water Resources Management in South Korea. Chapter 10, Integrated Water Resource Management: Cases from Africa, Asia, Australia, Latin America and USA, July 2019.

Conferences

  • Yi, S., Stanford, B., Yarnell, S., Murdoch, L., Grantham, T. Evaluating environmental flow dynamics in the Central Valley Under varying management scenarios. (Oral) 7th International Symposium on River Science (ISRS), 10/6-9/2025, Davis, California.
  • Yi, S., Stanford, B., Yarnell, S., Murdoch, L., Grantham, T. Environmental Flows Use Case – Assessing functional flow regimes as operational alternatives for the Central Valley. (Oral) California Water and Environmental Modeling Forum (CWEMF), 5/12-14/2025, Folsom, California.
  • Yi, S., Stanford, B., Yarnell, S., Murdoch, L., Grantham, T. Assessing Environmental Flows in the Central Valley Across Different Management Scenarios. (Oral) European Geosciences Union (EGU), 4/27-5/2/2025, Vienna, Austria.
  • Yi, S., Stanford, B., Yarnell, S., Zimmerman, J., Grantham, T. Evaluating environmental flows in the Central Valley under various management scenario. (Poster) AGU 12/9-13/2024, San Francisco, California.
  • Yi, S., Stanford, B., Yarnell, S., Zimmerman, J., Grantham, T. Assessment of environmental flows in the Central Valley under different management scenarios. (Oral) Biennial Bay-Delta Science Conference, 9/30 – 10/2/ 2024, Sacramento, California.
  • Lee, E., Ji, J., Yi, S., Lee, S., Yoon, J., Lee, C., Yi, J. Enhancing flood control and water management efficiency: A case study in South Korea. (Oral) International Conference on Water Pollution and Treatment, 7/21-23/2024, Berlin, Germany.
  • Yoon, J., Lee, E., Ji, J., Lee, S., Lee, C., Yi, S., Yi, J. Contribution of multipurpose utilization of Hwacheon Reservoir to water supply. (Poster) International Conference on Water Pollution and Treatment, 7/21-23/2024, Berlin, Germany.
  • Lee, S., Ji, J., Lee, E., Yoon, J., Lee, C., Yi, S., Yi, J. Deep learning for unpredicted flow forecasting in South Korea. (Oral) International Conference on Water Pollution and Treatment, 7/21-23/2024, Berlin, Germany.
  • Yi, S., Yi, J. Hydrological modeling of the Los Angeles River Basin. (Poster) AGU, 12/9-13/2019, San Francisco, California.
  • Yi, S., Sandoval-Solis, S., Thompson, L., Kilduff, P. Master Middle Ware: A Tool to Integrate Water Resources and Fish Population Dynamics Models. (Poster) California Water and Environmental Modeling Forum, 4/2-4/2018, Folsom, California.
  • Yi, S., Sandoval-Solis, S., Thompson, L., Kilduff, P. Master Middle Ware: A Tool to Integrate Water Resources and Fish Population Dynamics Models. (Poster) Interagency Ecological Program, 3/6-8/2018, Folsom, California.
  • Yi, S., Ju, Y., He., Y. Projecting future inland flooding susceptibility due to climate change in California using machine learning. (Oral) American Association of Geographers (AAG), 04/10-14/2018, New Orleans, Louisiana.
  • Yi, S., Sandoval-Solis, S., Thompson, L., Kilduff, P. Master Middle Ware: A Tool to Integrate Water Resources and Fish Population Dynamics Models. (Poster) AGU, 12/11-15/2017, New Orleans, Louisiana.
  • Yi, S., Sandoval-Solis, S., Bombardelli, F., Puente, C. Hydrological WEAP Modeling of the Upper Basin of the Apurimac River Basin, in Peru. (Poster) AGU, 12/14-18/2015, San Francisco, California.
  • Yi, S., Sandoval-Solis, S., Bombardelli, F., Puente, C. Current and Prospective Water Management in the Apurimac River Basin, in Peru. An Assessment of Available Water and Supply. (Poster), Chile California Conference 2015: “Envisioning the future, Creating it together”, 10/17/2015, Davis, California.
  • Yi, S., Sandoval-Solis, S., Bombardelli, F., Puente, C. Current and Prospective Water Management in the Apurimac River Basin, in Peru. An Assessment of Available Water and Supply. (Oral) EWRI, 5/17-21/2015, Austin, Texas.
  • Yi, S., Thompson, L., Kilduff, P., Sandoval-Solis, S. WEAPhish & Master_WEAPhish Middle- Ware Link to WEAP. (Oral) Workshop for University of California Davis Fish Population & Habitat Conceptual Model, 3/25/2015, Sacramento, California.
  • Yi, S., Sandoval-Solis, S., Bombardelli, F., Puente, C. Evaluating Current and Future Water Supply and Demands in the Apurimac River Basin in Peru, A Sensitivity Analysis of a Hydrologic and Water Planning Model. (Poster) AGU, 12/15-19/2014, San Francisco, California.