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Hydrology

Hydrology

M. Robinson | R. C. Ward

(2017)

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Book Details

Abstract

The book comprises nine chapters, with seven core chapters dealing in detail with the basic principles and processes of the main hydrological components of the water cycle: precipitation, interception, evaporation, soil water, groundwater, streamflow and water quality. It takes a broadly non-mathematical approach, although some numeracy is assumed particularly in the treatment of evaporation and soil water. The introductory and concluding chapters show the relations and interactions between these components, and also put the importance of water into a wider human context – its significant role in human history, its key role today, and potential role in future in the light of climate change and increasing global population pressures. The book is thoroughly up-to-date, contains over 100 diagrams and photographs to explain and amplify the concepts described, and contains over 750 references for further study.

Table of Contents

Section Title Page Action Price
Cover Cover
CONTENTS 5
PREFACE 6
INTRODUCTION 9
1.0 INTRODUCTION 10
1.1 WATER – FACTS AND FIGURES 12
1.1.1 THE SPECIAL CHARACTERISTICS OF WATER 12
1.2 THE CHANGING NATURE OF HYDROLOGY 14
1.2.1 EARLY THEORIES ABOUT THE ORIGIN OF SPRINGS AND STREAMFLOW 18
1.2.2 DEVELOPING UNDERSTANDING OF THE HYDROLOGICAL CYCLE 20
1.3 QUANTIFYING THE GLOBAL WATER BALANCE AND HYDROLOGICAL CYCLE 22
Links to Global energy budget 25
1.4 THE NATURE OF HYDROLOGICAL PROCESSES 26
1.5 WHY HYDROLOGY MATTERS TODAY 28
SUGGESTED DISCUSSION TOPICS 30
REFERENCE COMPILATIONS AND RESOURCES 33
USEFUL WEBSITES 34
Intergovernmental organizations and International research bodies 34
National Research Bodies 34
OPEN SOURCE DATA (UK) AND SOFTWARE TOOLS 35
PRECIPITATION 37
2.1 INTRODUCTION AND DEFINITIONS 38
2.1.1 WATER VAPOUR 38
2.1.2 CLOUDS 40
2.2 PRECIPITATION MECHANISMS 41
2.2.1 FRONTAL AND CYCLONIC PRECIPITATION 42
2.2.2 CONVECTIONAL PRECIPITATION 43
2.2.3 OROGRAPHIC PRECIPITATION 44
2.3 GENERAL SPATIAL PATTERNS OF PRECIPITATION 44
2.3.1 GLOBAL PATTERN OF PRECIPITATION 45
2.3.2 REGIONAL PRECIPITATION 46
2.4 PRECIPITATION MEASUREMENT 48
2.4.1 POINT MEASUREMENT 48
Particular measurement problems 52
2.4.2 AREAL RAINFALL 53
Design of raingauge networks 53
Weather radar and satellites 56
2.5 TEMPORAL VARIATIONS IN PRECIPITATION RECORDS 59
2.5.1 STOCHASTIC VARIATIONS 60
2.5.2 PERIODIC VARIATIONS 60
2.5.3 SECULAR VARIATIONS 63
2.6 ANALYSIS OF PRECIPITATION DATA 66
2.6.1 CATCHMENT MEAN RAINFALL 66
2.6.2 STORM PRECIPITATION PATTERNS 68
2.6.3 RAINFALL STATISTICS 68
Point rainfall frequencies 68
Areal rainfall frequencies 70
Determining the Probable Maximum Precipitation (PMP) 70
Droughts 73
2.7 HYDROLOGICAL ASPECTS OF SNOW 75
2.7.1 DISTRIBUTION OF SNOW 75
2.7.2 AMOUNT OF SNOWFALL 76
REVIEW PROBLEMS AND EXERCISES 79
WEBSITES 79
Meteorological Services 79
INTERCEPTION 81
3.1 INTRODUCTION AND DEFINITIONS 82
3.2 INTERCEPTION AND THE WATER BALANCE 83
3.3 MEASURING INTERCEPTION 88
3.4 FACTORS AFFECTING INTERCEPTION LOSS FROM VEGETATION 92
3.5 INTERCEPTION LOSSES FROM DIFFERENT TYPES OF VEGETATION 94
3.5.1 WOODLANDS 95
3.5.2 GRASSES AND SHRUBS 98
3.5.3 AGRICULTURAL CROPS 99
3.6 MODELLING INTERCEPTION 100
3.7 INTERCEPTION OF SNOW 106
3.8 CLOUD WATER DEPOSITION 107
REVIEW PROBLEMS AND EXERCISES 109
EVAPORATION 111
4.1 INTRODUCTION AND DEFINITIONS 112
4.2 THE PROCESS OF EVAPORATION 113
4.2.1 THERMODYNAMIC FACTORS 115
4.2.2 AERODYNAMIC FACTORS 117
4.3 ESTIMATION OF EVAPORATION 119
4.3.1 LIQUID WATER LOSS 119
4.3.2 WATER VAPOUR FLOW 120
Measurement representativeness 123
4.4 EVAPORATION FROM DIFFERENT SURFACES 124
4.4.1 OPEN WATER 124
Size of water surface 124
Water depth 125
Salinity 126
Evaporation from snow 126
4.4.2 EVAPORATION FROM BARE SOILS 127
Remote sensing 128
4.4.3 EVAPORATION FROM VEGETATION COVERS 128
Transpiration – a necessary evil? 129
Cell water potentials 129
Stomatal control 131
Root control 134
4.4.4 SOIL FACTORS 136
4.5 THE COMPONENTS OF EVAPORATION FROM VEGETATION COVERS 137
4.5.1 RESISTANCES TO WATER VAPOUR FLUX 137
4.5.2 INTERCEPTION AND TRANSPIRATION 139
Mixed vegetation 142
Sparse vegetation 142
4.6 MODELLING EVAPORATION 143
4.6.1 POTENTIAL EVAPORATION AND ACTUAL EVAPORATION 143
4.6.2 MODELS OF POTENTIAL EVAPORATION 144
The Thornthwaite model 145
The Penman–Monteith model 146
4.6.3 TEMPORAL AND SPATIAL VARIATIONS IN EVAPORATION 149
Operational use of potential evaporation models 149
4.7 PROGRESS IN UNDERSTANDING EVAPORATION PROCESSES 152
4.7.1 PHYSICAL BASIS FOR EVAPORATION EQUATIONS 152
Advection 153
4.7.2 CHANGES IN EVAPORATION WITH CLIMATE CHANGE 154
REVIEW PROBLEMS AND EXERCISES 155
WEBSITES 155
GROUNDWATER 157
5.1 INTRODUCTION AND DEFINITIONS 158
5.2 GEOLOGICAL BACKGROUND 159
5.3 CONFINED AND UNCONFINED AQUIFERS 160
5.4 GROUNDWATER STORAGE 164
5.4.1 POROSITY 165
5.4.2 SPECIFIC YIELD AND SPECIFIC RETENTION 167
5.4.3 STORAGE CHANGE 168
Storage changes in unconfined aquifers 169
Storage changes in confined aquifers 172
5.5 GROUNDWATER MOVEMENT 175
5.5.1 DARCY’S LAW 176
5.5.2 FACTORS AFFECTING HYDRAULIC CONDUCTIVITY 179
5.6 GROUNDWATER FLOW SYSTEMS 180
5.6.1 FLOW NETS 181
5.6.2 CLASSICAL MODELS OF GROUNDWATER FLOW 183
5.6.3 REGIONAL GROUNDWATER FLOW 186
5.6.5 GROUNDWATER FLOW IN COASTAL AQUIFERS 189
5.7 GROUNDWATER IN JOINTED AND FRACTURED ROCKS 191
REVIEW PROBLEMS AND EXERCISES 195
WEBSITES 195
SOIL WATER 197
6.1 INTRODUCTION 198
6.2 PHYSICAL PROPERTIES OF SOILS AFFECTING SOIL WATER 198
6.3 STORAGE OF SOIL WATER 200
6.3.1 WATER RETENTION FORCES 200
6.3.2 SOIL WATER CHARACTERISTICS (RETENTION CURVES) 202
6.3.3 HYSTERESIS 203
6.3.4 SOIL WATER ‘CONSTANTS’ 205
6.3.5 SOIL WATER ENERGY (POTENTIAL) 205
6.4 MOVEMENT OF SOIL WATER 208
6.4.1 PRINCIPLES OF UNSATURATED FLOW 208
Hydraulic conductivity 212
6.4.2 INFILTRATION OF WATER INTO SOILS 214
Infiltration capacity 214
Soil water movement during infiltration 215
Time variations in infiltration capacity 217
6.4.3 SOIL WATER REDISTRIBUTION FOLLOWING INFILTRATION 218
6.5 SOIL WATER BEHAVIOUR UNDER FIELD CONDITIONS 220
6.5.1 SOIL LAYERING 221
6.5.2 MACROPORES 222
Spatial variability 225
6.5.3 TOPOGRAPHY 225
6.5.4 HUMAN INFLUENCES 228
REVIEW PROBLEMS AND EXERCISES 230
STREAMFLOW 233
7.1 INTRODUCTION 234
7.2 QUICKFLOW AND DELAYED FLOW 235
7.3 SOURCES AND COMPONENTS OF RUNOFF 236
7.3.1 CHANNEL PRECIPITATION (Qp) 238
7.3.2 OVERLAND FLOW (Qo) 238
7.3.3 THROUGHFLOW (Qt) 238
7.3.4 GROUNDWATER FLOW (Qg) 239
7.4 EVENT-BASED VARIATIONS 240
7.4.1 THE HORTON HYPOTHESIS 240
7.4.2 THE HEWLETT HYPOTHESIS 242
Disjunct source areas 243
Hydrological linkages 246
The role of throughflow 247
The role of groundwater 249
7.4.3 MULTIPLE PROCESSES 251
7.4.3 RIVER CHANNELS AND NETWORKS 253
7.4.4 MEASUREMENT OF RIVER FLOWS 255
Ungauged basins 256
7.5 FLOW VARIATIONS – DAILY 257
7.6 FLOW VARIATIONS – SEASONAL 260
7.7 LONG-TERM VARIATIONS OF FLOW AND FLOW VARIABILITY 262
7.8 EXTREMES OF RUNOFF 263
7.8.1 FLOOD FLOWS 263
Flood intensifying factors 266
Spatial patterns of flooding 267
7.8.2 LOW FLOWS 269
Low-flow definitions 270
Patterns of low flow in Britain 271
7.9 RUNOFF FROM SNOW-COVERED AREAS 272
7.9.1 SNOWMELT 272
7.9.2 RUNOFF FROM GLACIERIZED AREAS 274
REVIEW PROBLEMS AND EXERCISES 276
WEBSITES 277
WATER QUALITY 279
8.1 INTRODUCTION AND DEFINITIONS 280
8.1.1 PROPERTIES OF WATER 280
8.1.2 WATER QUALITY CHARACTERISTICS 282
8.2 PROCESSES CONTROLLING THE CHEMICAL COMPOSITION OF WATER 285
8.3 ATMOSPHERIC SOLUTES 287
8.4 INTERCEPTION AND EVAPORATION 293
8.5 SOIL WATER AND GROUNDWATER 294
8.5.1 WEATHERING OF ROCKS 294
8.5.2 ADSORPTION AND EXCHANGE REACTIONS 296
8.5.3 SOLUTE MOVEMENT IN SOILS AND GROUNDWATER 299
8.5.4 TRACERS 304
8.5.5 CHEMICAL EVOLUTION OF GROUNDWATER 304
8.5.6 PRESENTATION OF WATER CHEMISTRY DATA 306
8.6 RUNOFF 307
8.6.1 PROCESSES IN STREAM CHANNELS 307
8.6.2 LAKES 310
8.6.3 CATCHMENTS 311
Geology and Climate 311
Human impacts 313
Emerging Pollutants 317
8.6.4 WATER QUALITY MODELLING AND MANAGEMENT 319
8.7 IN CONCLUSION 322
REVIEW PROBLEMS AND EXERCISES 323
WEBSITES 323
HYDROLOGY IN A CHANGING WORLD 325
9.1 INTRODUCTION AND GLOBAL DRIVERS OF CHANGE 326
9.1.1 GLOBAL POPULATION 329
Water quality and health 330
9.1.2 GLOBAL CLIMATE CHANGE 331
9.2 TERRESTRIAL INTERACTIONS 335
9.2.1 BASIN SCALE – LAND USE CHANGE 335
Irrigation 336
Agricultural drainage 336
Forestry 337
Urbanisation 339
Flow abstractions 340
Integrated catchment management 341
9.2.2 REGIONAL LAND COVER – CLIMATE INTERACTIONS 341
9.2.3 WATER CONFLICTS 344
9.2.4 WATER TRANSFERS 346
Physical transfers – Engineering 346
Virtual water transfers 347
9.2.5 WATER USE EFFICIENCY 348
Water pricing 349
9.2.6 ECOSYSTEM HEALTH 350
Natural flood protection 351
9.3 GLOBAL – CLIMATE CHANGE 352
9.3.1 CLIMATE MODELLING 352
9.3.2 CLIMATE CHANGE IMPACTS 353
9.4 FUTURE CHALLENGES IN HYDROLOGY 354
9.4.1 SCALE AND TRANSPOSITION 355
9.4.2 INSTRUMENTATION AND DATA COLLECTION 355
9.4.3 PUBLIC ENGAGEMENT AND SCRUTINY OF SCIENCE 356
9.4.4 HYDROLOGY AS A PROFESSION 358
9.5 EPILOGUE 359
REVIEW PROBLEMS AND DISCUSSION TOPICS CONCERNING CHOICES 361
HYDROLOGY JOBS 361
WEBSITE RESOURCES FOR FURTHER STUDY 362
REFERENCES 363
INDEX 392
ACKNOWLEDGEMENTS 400