Preface (vii) 1. INTRODUCTION 1—37 1.1 Irrigation 1
1.2 Impact of Irrigation on Human Environment 2
1.3 Water Resources of India 4
1.4 Need of Irrigation in India 9
1.5 Development of Irrigation in India 10
1.6 Major and Medium Irrigation Schemes of India 12
1.7 Minor Irrigation 15
1.8 Command Area Development 15
1.9 Planning of Irrigation Projects 17
1.10 Crops and Crop Seasons 28
Exercises 36
References 36
2. HYDROLOGY 38—91 2.1 Hydrology 38
2.2 Hydrologic Cycle 38
2.3 Precipitation 40
2.4 Abstraction from Precipitation 56
2.5 Runoff 57
2.6 Stream Flow 60
2.7 Hydrographs 68
2.8 Floods 84
Exercises 90
References 91
3. SOIL-WATER RELATIONS AND IRRIGATION METHODS 92—120 3.1 Soils 92
3.2 Physical Properties of Soil 93
3.3 Chemical Properties of Soil 95
3.4 Soil-Water Relationships 96
3.5 Root-Zone Soil Water 99
3.6 Infiltration 102
3.7 Consumptive Use (or Evapotranspiration) 104
3.8 Irrigation Requirement 108
3.9 Frequency of Irrigation 110
3.10 Methods of Irrigation 112
3.11 Quality of Irrigation Water 118
Exercises 119
References 120
