Sunmin Kim
Associate Professor · Dr. Eng.

Sunmin Kim

Int. Management of Civil Infrastructure
Dept. of Civil and Earth Resources Eng.
Kyoto University

Hydrologic Forecasting Machine Learning Climate Change

Research & Background

I am an Associate Professor at Kyoto University's Department of Civil and Earth Resources Engineering, where I lead research on intelligent water systems and climate-resilient hydrology. My work bridges data-driven machine learning approaches with physically-based hydrological modelling to address pressing challenges in flood prediction and water resource management.

My research focuses on applying artificial neural networks — including convolutional and recurrent architectures — to real-time river stage prediction and rainfall forecasting. I am particularly interested in investigating how reinforcement learning algorithms can be applied to the operation of multiple dam reservoirs to enhance short-term flood control performance.

Another major thread of my work concerns climate change adaptation: using General Circulation Model (GCM) outputs to project future changes in extreme precipitation and water availability across major river basins in Japan and Asia. Recent work also investigates Probable Maximum Precipitation (PMP) estimation under future climate scenarios using large ensemble simulation data.

Contact
kim.sunmin.6x (at) kyoto-u.ac.jp
(+81) 75-383-3151
C1-292, Kyoto Daigaku Katsura, Nishikyo-ku, Kyoto 615-8540

News & Updates

2026 GrantAwarded funding through the university's internal grant program, Ishizue. Integrated Assessment of Flood Risk in the Non-Stationary Nature (1.75M JPY, 2026).
2025 GrantNew collaborative research project started: A Study of Great Acceleration in the Anthropocene with KAIST (NRF of Korea, 3.5M USD, 2024–2030).
2025 PaperHydrological forecasting tests on neural network models considering input variable selection and data quality. Journal of JSCE, 13(2).
2025 PaperANN-based spatial downscaling of d4PDF hourly precipitation data published in Journal of Disaster Science and Management.

Research Topics

Teleconnections · Prediction
Monsoon Rainfall Drivers and Prediction
Machine learning approaches for identifying optimal predictors in monthly rainfall forecasting, incorporating large-scale teleconnection signals.
Deep Learning · Hydrology
Neural Networks for Hydrologic Forecasting
CNN and ANN models for rainfall occurrence prediction and real-time river stage forecasting, including input variable selection and data quality analysis.
Machine Learning · Climate
ML-based Spatial Downscaling of Precipitation
Applying ANN and deep learning models to downscale GCM and large ensemble (d4PDF) precipitation data to local scales with improved accuracy.
Climate Adaptation
Climate Change & Water Resources Management
Future changes in heavy rainfall frequency and water resource conditions for major river basins in Japan and Asia under climate projections.
Operational Hydrology
Real-time Flood Forecasting with Weather Radar
Ensemble stochastic flood forecasting using radar image extrapolation coupled with distributed hydrologic models for early warning systems.
Extreme Hydrology
Probable Maximum Precipitation under Climate Change
Quantifying uncertainty in PMP estimation using large ensemble climate simulations (d4PDF) and future climate projections, including pseudoadiabatic assumptions.

Selected Papers

2026
Observed Amplification of Flood Risk in Pakistan driven by Changes in Inundation Extent and Human Settlement
Nguyen, T., Kwon, Y., Lee, D., Tanaka, T., Kim, S., Mustajab A., Kim, H.
Remote Sensing Applications: Society and Environment
DOI
2026
Using Ensemble Optimal Interpolation with Dynamic Covariance Matrices for Assimilation of Water Level Observations in a Distributed Rainfall-Runoff-Inundation Model
Khaniya, M., Tachikawa, Y., Yamamoto, K., Sayama, T., Kim, S.
Journal Hydrology
DOI
2025
Hydrological Forecasting Tests on Neural Network Models Considering Input Variable Selection and Data Quality
Kim, S., Tanaka, Y., & Tachikawa, Y.
Journal of JSCE, 13(2), 24-16187
DOI
2024
Machine Learning on GCM Atmospheric Variables for Spatial Downscaling of Precipitation
Kim, S., Shibata, M., & Tachikawa, Y.
Journal of JSCE, 12(2), 23-16152
DOI
2023
Analyzing Uncertainty in Probable Maximum Precipitation Estimation with Large Ensemble Climate Simulation Data
Kim, Y., Kim, S., & Tachikawa, Y.
Journal of Flood Risk Management, 17(1), e12943
DOI

Research Members

Cyclone
Mr. Sineth
PhD Student
Cityscape dusk
Mr. Yubin
PhD Student (Visiting)
Wave
Mr. Suita
Master Student
Cactus
Mr. Yamaguchi
Master Student
Rain cloud
Mr. Inoue
Master Student
Globe Americas
You
PhD Student
Umbrella rain
You
Master Student
Lightning
You
B4 Student

Lectures & Courses

Water Resources Engineering
Undergraduate · Dept. of Civil and Earth Resources Engineering
σ
Probability & Statistical Analysis and Exercises
Undergraduate · Quantitative methods for engineering applications
λ
Physics of Wave and Oscillation
Undergraduate · Fundamentals of wave mechanics
Advanced Dynamics
Undergraduate · Advanced topics in structural dynamics

Access & Contact

C1-292, Kyoto Daigaku Katsura
Nishikyo-ku, Kyoto 615-8540
Japan
(+81) 75-383-3151
kim.sunmin.6x (at) kyoto-u.ac.jp
Getting Here
From Katsura Sta. (Hankyu Line)
City-bus West 6 or Keihan-bus KeihanChuo → Get off at "Katsura-Goryou-Jaka"
From Kyoto Sta. (JR)
Keihan-bus #21 or Yasaka-bus #6 from Katsura-gawa Sta.