دانلود کتاب Rainwater Harvesting for Agriculture in the Dry Areas

فهرست مطالب :

1.1 Introduction......Page 18
1.2 Concept and definition of water harvesting......Page 19
1.3 History......Page 20
1.4 Components of water harvesting systems......Page 23
1.5 Importance and benefits of water harvesting......Page 24
1.6 Impact of global climate change and adaptation measures......Page 25
2.2 The hydrological cycle......Page 27
2.4 Hydrological characteristics......Page 29
2.4.2 Precipitation......Page 30
2.5 Frequency analysis and design rainfall......Page 32
2.6.1 Factors affecting runoff......Page 34
2.6.2 Runoff models suitable for water harvesting......Page 36
3.1 Introduction......Page 47
3.2 Classifications of water harvesting methods......Page 48
3.3 Micro-catchment water harvesting methods......Page 49
3.3.1 Rooftop and courtyard systems......Page 52
3.3.2 On-farm systems......Page 57
3.4.1 Introduction......Page 73
3.4.2 Long-slope water harvesting......Page 74
3.4.3 Floodwater harvesting systems......Page 81
3.5.1 Traditional techniques......Page 86
3.6 Contamination concerns......Page 87
4.2 Methods of improving runoff......Page 88
4.2.3 Smoothing the soil surface......Page 89
4.2.4 Compacting the soil surface......Page 90
4.2.5 Surface sealing......Page 92
4.2.6 Impermeable coverings......Page 93
4.3 Advantages and disadvantages of runoff-inducement methods......Page 98
4.4 Further considerations......Page 99
6.2.1 Soil......Page 120
6.2.2 Crop water requirements......Page 123
6.3.2 Design rainfall......Page 132
6.3.4 Basic design procedure......Page 134
6.3.5 Selection of site and method......Page 136
6.3.6 Selection of crops......Page 138
6.3.8 Catchment: Cropping area ratio CCR......Page 139
6.3.9 Design examples......Page 140
6.3.11 Further considerations in area ratio selection......Page 141
6.4.1 Design for trees......Page 143
6.5.1 Dimensioning and system layout......Page 144
6.5.2 Bund earthwork......Page 148
6.5.3 Earthwork balance......Page 150
8.2 Implementing water harvesting systems......Page 177
8.3 Considerations in implementation......Page 181
8.3.1 Over-design and under-design issues......Page 182
8.3.2 Appropriate technology......Page 183
8.4 Operating water harvesting systems......Page 184
8.5 Maintaining water harvesting systems......Page 186
8.6 Monitoring and evaluation......Page 187
8.7 Extension and training......Page 191
References......Page 230
C......Page 240
D......Page 241
F......Page 242
I......Page 243
M......Page 244
P......Page 245
R......Page 246
S......Page 247
V......Page 248
Z......Page 249
Color plates......Page 250