1. Next Generation Artificial Intelligence Research Center & School of Information Science and Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo113-8656, Japan
2. Institute of Civil, Environmental and Geomatic Engineering, ETH Zürich, 8093Zurich, Switzerland
3. Graduate School of Asian and African Area Studies, Kyoto University, Yoshida-Shimoadachi, Sakyo, Kyoto606-8501, Japan
4. Oak Ridge National Laboratory, Oak Ridge, Tennessee37831, United States
5. Swiss Federal Institute of Aquatic Science and Technology, Eawag, 8600Dübendorf, Switzerland