TP Chemical technology 6 TA Engineering (General). Civil engineering (General) 5 Water management 4 Water scarcity 4 Irrigation 3 Land use 3 Water consumption 3 Agriculture 2 Biochemical oxygen demand 2 China 2 Climate change 2 Climate models 2 Cost benefit analysis 2 Dissolved oxygen 2 Ecosystems 2 Egypt 2 Enviromental management 2 Food supply 2 Input output model 2 International trade 2 Interregional input-output model 2 Rivers 2 Sustainability 2 Sustainable development 2 TJ Mechanical engineering and machinery 2 Urban growth 2 Water conservation 2 Water quality 2 Water supply 2 Watersheds 2