Water quality Dissertations, Academic 49 Dissertations 47 Water 33 Measurement 27 Pollution 27 Environmental aspects 18 Water quality management 16 Management 12 Analysis 11 Drinking water 9 Heavy metals 9 Land use 9 Purification 7 Water-supply 5 Phytoplankton 4 Quality control 4 Refuse and refuse disposal 4 Reservoirs 4 Rivers 4 Environmental protection 3 Lakes 3 Mineral waters 3 Water quality biological assessment 3 Benthos 2 Contamination 2 Design and construction 2 Effect of water pollution on 2 Effect of water quality on 2 Environmental impact analysis 2