water conservation 20 water demand 20 water management 20 water protection 20 water quality 20 water resource 20 water resources management 20 water pollution 18 water 17 water analysis 17 water consumption 17 water monitoring 17 natural resource 16 resource conservation 16 resources management 16 environmental conservation 15 environmental impact 15 environmental impact assessment 15 environmental protection 15 fresh water pollution 15 freshwater conservation 15 freshwater degradation 15 freshwater ecosystem 15 freshwater monitoring 15 freshwater resource 15 pollution control 15 pollution cost 15 water utilisation;environmental assessment 15 Ecosystem Management 14 Environmental Governance 14