Business School Hohai University Nanjing 211100 China;
Institute of Project Management Hohai University Nanjing 211100 China;
Jiangsu Provincial Collaborative Innovation Center of World Water Valley and Water Ecological Civilization Nanjing 211100 China;
Guangxi Flood Control and Drought Relief Headquarters Nanning 530023 China;
Security risk factor identification; Heterogeneous data; Grey relational analysis model; Relational degree; Information entropy; Conditional entropy; Small reservoir; Guangxi;