Soil water measurement a practical handbook
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 compre...
| Otros Autores: | |
|---|---|
| Formato: | Libro electrónico |
| Idioma: | Inglés |
| Publicado: |
Hoboken, NJ :
John Wiley & Sons
2016.
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| Colección: | Wiley ebooks.
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| Acceso en línea: | Conectar con la versión electrónica |
| Ver en Universidad de Navarra: | https://innopac.unav.es/record=b40607963*spi |
Tabla de Contenidos:
- Title Page; Table of Contents; Preface; Part I: Introduction; 1 Soil Water in Context; 1.1 What Is Soil Water?; 2 How Does Water in Soil Interact with the Soil Matrix, Air, Roots, Gravity and Other Substances Present?; 2.1 Static Properties of Soil Water; 2.2 Dynamic Properties of Soil Water; 2.3 Preferential Flow; 3 What Do We Need to Measure?; 3.1 Diffusivity; 3.2 Matric Flux Potential; 3.3 Sorptivity; 4 Spatial Variability; 4.1 Representative Elementary Volume; 4.2 Deterministic versus Random Variation; 4.3 Geostatistics; Part II: Water Content; 5 Definitions.
- 5.1 Basis for Expressing Water Content5.2 Standard Definition of Soil Water; 5.3 Measurement of Water Content; 6 Gravimetric Method; 6.1 Equipment Required; 6.2 Procedures; 6.3 Likely Problems with Gravimetric Sampling; 6.4 Direct Measurement of Bulk Density; 6.5 Indirect Measurement of Bulk Density: Gamma Ray Probes; 6.6 Conclusion; Appendix 6.A Scintillation Detectors; 7 Neutron Scattering; 7.1 Principles of the Method; 7.2 Types of Neutron Probe; 7.3 Access Tube Installation; 7.4 Accommodating Farming Operations; 7.5 Accuracy and Precision of Measurement; 7.6 Measurements in Access Tubes.
- 7.7 Calibration7.8 Measurements near the Surface; 7.9 Processing and Use of Data; 7.10 Cosmic-Ray Soil Moisture Observing System; 7.11 Radiological Safety; 8 Dielectric Methods; 8.1 Dielectrics
- Basic Principles; 8.2 Factors Affecting Permittivity of Water; 8.3 Fundamentals of Electrical Circuits; 8.4 The Relationship between Soil Water Content and Permittivity; 8.5 Transmission Lines; 8.6 Practical Realisation of a Transmission Line System
- Time Domain Reflectometry; 8.7 Capacitance Methods; 8.8 Theta and Profile Probes; 8.9 ECH2O Probe; 8.10 Hydra Probe.
- 8.11 Installation of Access Tubes for Dielectric Probes8.12 Permanent Installation of Rod-Type Probes; 8.13 Field Monitoring; 8.14 Soil Calibration; 8.15 Ground-Penetrating Radar; 8.16 Dielectric Methods
- Conclusion; 9 Dual-Probe Heat-Pulse Sensors; 9.1 Introduction; 9.2 Principles of Operation; 10 Electrical Resistivity Imaging; 10.1 Introduction; 10.2 Theoretical Basis of ERI; 10.3 Measurement Methods; 10.4 Measurements in Practice; 10.5 Conclusion; Part III: Water Potential; 11 Water Potential Measurement; 11.1 Introduction; 11.2 Types of Sensor; 11.3 Sensitivity; 11.4 Response Time.
- 12 Tensiometers12.1 Components of a Tensiometer; 12.2 The Porous Barrier; 12.3 The Body Tube; 12.4 The Air Trap; 12.5 The Pressure Sensor; 12.6 Construction of Tensiometers; 12.7 Tensiometer Installation; 12.8 Time before Tensiometers can be Read Reliably after Filling; 12.9 Reading of Tensiometers; 12.10 Tensiometer Maintenance; 12.11 Quality Control of Tensiometer Readings; 12.12 Deep Water Potential Measurements; Appendix 12.A Pressure Transducers; Appendix 12.B De-aired Water; 13 Indirect Methods of Water Potential Measurement; 13.1 Introduction; 13.2 Resistance Block.
