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Unit 1 1

Part A Water resources of the world 1

Part B What causes flooding 9

Unit 2 18

Part A Reservoirs and dams 18

Part B Dams and development-an insight to the report of the world commission on dams 25

Unit 3 39

Part A Hydroelectric power 39

Part B Pumps and Pumping 50

Unit 4 59

Part A Water pollution and pollutants 79

Part B U.S. Wastewater treatment-past and present 86

Unit 6 91

Part A Modem buildings and structural materials 91

Part B Bridges 97

Unit 7 103

Part A Soil erosion and soil conservation 103

Part B Soil Conservation Issues on the United States 109

Unit 8 122

Part A Engineering economy in water-resources planning (I) 122

Part B Engineering economy in water-resources planning (II) 130

Unit 9 139

Part A Hydrology 139

Part B Current problems of stochastic hydrology 146

Part A Summary of EIA 161

Unit 10 161

Part B Inadequacies in current methods for environmental assessment 166

Unit 11 172

Part A Irrigation methods 172

Part B RDO-the new technique of water saving irrigation management in China 183

Unit 13 216

Part A 21st Century's water saving in agriculture of Beijing 216

Part B The research and application of plastic pipe in infiltration irrigation 224

Unit 14 232

Part A Methods of applications of drip irrigation system 232

Part B Drip irrigation technology and state western area development strategy 238

Part A Water use efficiency of grain crops on irrigated fields in China 255

Unit 15 255

Part B Cumulative function of water sensitivity index for rice and its variation with hydrological years. 264

Unit 273

Part A Some topics on developing water-saving irrigation 273

Part B Optimal use of irrigation water in the Jordan valley: a case study 281

Unit 17 294

Part A Irrigation canals 294

Part B The SLGCAD software system on a new type of linked tetra-shaft double-cantilever flat gate 301

Unit 18 314

Part A A preliminary investigation on irrigation schedule under sprinkler irrigation 314

Part B Study on expert system of irrigation forecast and decision making for water saving 321

参考译文 332

Key to exercises 388

参考文献 401