Water resources development 116 Water resources 78 Water-supply 41 Water Resources 40 Watershed management 19 Irrigation 18 Water management 17 Water 15 Natural Resource Economics, (New March 2000) 14 Water conservation 14 Hydrology 13 Sustainability 12 Sustainable development 12 Economics 11 Land use 11 Natural resources 11 Policy and Planning 11 Pollution and Degradation 11 Water rights 11 Dams 10 Land Resources 10 Rivers 9 Water quality 9 Water resources development-India 9 Biodiversity 8 India 8 Soil Water Management (Irrigation and Drainage), (Revised June 2002) 8 Water resource 8 Water resource management 8 Social Psychology and Social Anthropology, (New March 2000) 7