Soil Water Measurement. A Practical Handbook. Edition No. 1

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Book
368 Pages
March 2016
John Wiley and Sons Ltd
ID: 3187534

This book is written for all those involved in measurement of soil water phenomena, whether they be environmental scientists, field technicians, agronomists, meteorologists, hydrogeologists, foresters, physical geographers, civil or water engineers or students in these subjects. It contains a comprehensive description of all the major methods used for measurement of soil water content and potential, solute concentration, transport and balance of water and solutes, including recharge to groundwater aquifers. The emphasis is firmly on techniques which can be applied in the field or on samples obtained from the field.

The theory and practice of the workings of the main instruments and methods available is described, along with practical tips on surmounting some of the main difficulties and explanations of many commonly encountered jargon words.

Preface vi

Part I: Introduction 1

1 Soil Water in Context 3

2 How Does Water in Soil Interact with the Soil Matrix, Air, Roots, Gravity and Other Substances Present? 6

3 What Do We Need to Measure? 14

4 Spatial Variability 16

Part II: Water Content 21

5 Definitions 23

6 Gravimetric Method 26

7 Neutron Scattering 43

8 Dielectric METHODS 101

9 Dual-Probe Heat-Pulse Sensors 150

10 Electrical Resistivity Imaging 152

Part III: Water Potential 159

11 Water Potential Measurement 161

12 Tensiometers 164

13 Indirect Methods of Water Potential Measurement 203

14 Beyond −10 Metres Water Head 214

Part IV: Water Content – Potential Relations 223

15 Soil Water Characteristic Measurement 225

Part V: Hydraulic Conductivity 237

16 Hydraulic Conductivity Measurement and Prediction 239

17 Hydraulic Conductivity Measurement of Confined Soil Samples 241

18 Unconfined Measurements in the Field 257

Part VI: Solute Measurement 277

19 Principles and Pitfalls 279

20 Solution Sampling 283

21 Solute Concentra tion Estimation by Electrical Conductivity 292

Part VII: Water and Solute Movement 301

22 Water and Solute Transport Applications 303

23 Water and Solute Flux Measurement 306

24 Soil Water and Solute Balance Measurement and Estimation 312

Part VIII: Conclusion 333

25 Concluding Remarks 335

References 336

Index 353

Authors

J. David Cooper

Table of Contents

Authors

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