1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering; Hohai University; Nanjing China
2. National Drought Mitigation Center; University of Nebraska-Lincoln; Lincoln NE USA
3. College of Hydrology and Water resources; Hohai University; Nanjing China
4. Center for International River Research; School of Business, Hohai University; Nanjing China
5. NOAA/National Climatic Data Center; Asheville NC USA