Water resources development 24 History 21 Dams 17 Flood control 13 Water-supply 9 Groundwater flow 7 Hydraulic engineering 7 more ... Watershed management 7 Design and construction 6 Environmental aspects 6 Government policy 6 Mathematical models 6 Canals 5 Economic conditions 5 Irrigation 5 Management 5 Shore protection 5 Social aspects 5 Hydraulics 4 Coastal zone management 3 Drainage 3 Environmental policy 3 Floodplain management 3 Political aspects 3 Pollution 3 Water-power 3 Citizen participation 2 Coasts 2 Data processing 2 Early works to 1800 2 less ...