Our research team is seeking a way to deal with the unsolved and emerging challenges in water-related fields as well as natural disasters using an interdisciplinary approach. We are collaborating hydrology, hydraulics, climatology, meteorology, civil engineering, data sciences, AI, ecology, forestry, agriculture, remote sensing, human factors, physiology, and social sciences for finding a new solution to these challenges. We are trying to find ways to warn the impact of natural disasters such as floods, heavy rainfall, typhoon, gust, heat waves, and cold waves on the public and individuals by collaborating data sciences, hydrology, hydraulics, meteorology, human factors, physiology, and social science. Specifically, real-time monitoring and prediction for flood and heavy rainfall using real-time observation, data assimilation, and AI are the main research topics of our research group. Additionally, we are attempting to suggest a framework of the digital twin in hydraulic infrastructure and water resources management based on AI and virtual reality.