Geometrical Considerations and Interfacial Processes Affecting Electromagnetic Measurement of Soil Water Content by TDR and Remote Sensing Methods PDF Download
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Author: United States-Israel Binational Agricultural Research and Development Fund
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: United States-Israel Binational Agricultural Research and Development Fund
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Agriculture, Rural Development, Food and Drug Administration, and Related Agencies
Publisher:
ISBN:
Category : Rural development
Languages : en
Pages : 1104
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Book Description
Author: Gordon C. Starr
Publisher:
ISBN:
Category :
Languages : en
Pages : 232
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Book Description
Author: American Geophysical Union. Joint Assembly
Publisher:
ISBN:
Category : Geochemistry
Languages : en
Pages : 568
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Book Description
Author: W. G. M. Bastiaanssen
Publisher:
ISBN:
Category : Dynamic meteorology
Languages : en
Pages : 84
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Book Description
Author: Benjamin A. Flugstad
Publisher:
ISBN:
Category : Soil moisture
Languages : en
Pages : 236
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Book Description
Soil water content and water potential are two important parameters in determining the status of water in the soil. Improvement in the ability to measure these parameters by way of increased speed, accuracy, resolution, imaging volume, ease of automation, as well as reduced calibration requirements and reduced soil disturbance would be of utility to many applications in agriculture and engineering. To make the measurements economically and without the use of hazardous materials or methods would also be of value. A brief review is given on most of the existing water content and water potential measurement techniques with focus given on electromagnetic and quantum mechanic techniques due to their potential for best balancing the design goals. A review of the theories of electromagnetics and quantum mechanics are presented with applications to soil water content and water potential measurements. One electromagnetic method, Time Domain Reflectometry, or TDR, shows great promise in balancing all the desired design goals. A mathematical model is proposed to be able to predict TDR water content and electrical conductivity (or salinity) measurement results over wide ranges of those parameters. Preliminary validations were performed on the model for both invasive and potentially non-invasive TDR probes in a sandy soil with the results showing good agreement between predictions and actual results but with some model refinements still needed. A proposal for ongoing research is given to refine the models and address the question on the feasibility of using the models in a field grade TDR instrument to measure water content and electrical conductivity (or salinity).
Author: Michael W. Smith
Publisher:
ISBN:
Category : Frozen ground
Languages : en
Pages : 24
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Author: Yorum Rubin
Publisher: Springer Science & Business Media
ISBN: 1402031025
Category : Science
Languages : en
Pages : 518
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Book Description
This ground-breaking work is the first to cover the fundamentals of hydrogeophysics from both the hydrogeological and geophysical perspectives. Authored by leading experts and expert groups, the book starts out by explaining the fundamentals of hydrological characterization, with focus on hydrological data acquisition and measurement analysis as well as geostatistical approaches. The fundamentals of geophysical characterization are then at length, including the geophysical techniques that are often used for hydrogeological characterization. Unlike other books, the geophysical methods and petrophysical discussions presented here emphasize the theory, assumptions, approaches, and interpretations that are particularly important for hydrogeological applications. A series of hydrogeophysical case studies illustrate hydrogeophysical approaches for mapping hydrological units, estimation of hydrogeological parameters, and monitoring of hydrogeological processes. Finally, the book concludes with hydrogeophysical frontiers, i.e. on emerging technologies and stochastic hydrogeophysical inversion approaches.
Author: Raphael A. Viscarra Rossel
Publisher: Springer Science & Business Media
ISBN: 9048188598
Category : Science
Languages : en
Pages : 440
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Book Description
This book reports on developments in Proximal Soil Sensing (PSS) and high resolution digital soil mapping. PSS has become a multidisciplinary area of study that aims to develop field-based techniques for collecting information on the soil from close by, or within, the soil. Amongst others, PSS involves the use of optical, geophysical, electrochemical, mathematical and statistical methods. This volume, suitable for undergraduate course material and postgraduate research, brings together ideas and examples from those developing and using proximal sensors and high resolution digital soil maps for applications such as precision agriculture, soil contamination, archaeology, peri-urban design and high land-value applications, where there is a particular need for high spatial resolution information. The book in particular covers soil sensor sampling, proximal soil sensor development and use, sensor calibrations, prediction methods for large data sets, applications of proximal soil sensing, and high-resolution digital soil mapping. Key themes: soil sensor sampling – soil sensor calibrations – spatial prediction methods – reflectance spectroscopy – electromagnetic induction and electrical resistivity – radar and gamma radiometrics – multi-sensor platforms – high resolution digital soil mapping - applications Raphael A. Viscarra Rossel is a scientist at the Commonwealth Scientific and Industrial Research Organisation (CSIRO) of Australia. Alex McBratney is Pro-Dean and Professor of Soil Science in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia. Budiman Minasny is a Senior Research Fellow in the Faculty of Agriculture Food & Natural Resources at the University of Sydney in Australia.
Author: Kevin M O'Connor
Publisher: CRC Press
ISBN: 1000101614
Category : Science
Languages : en
Pages : 417
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Book Description
GeoMeasurements by Pulsing TDR Cables and Probes examines Time Domain Reflectometry (TDR) research and provides information on its use as a robust, reliable, and economical production tool. Common uses for TDR technology include telecommunications and power industries, but the text examines applications such as measurement of moisture of unsaturated soils; detection of fluids for leak and pollution; measurement of water levels for hydrological purposes; measurement of water pressures beneath dams; and deformation and stability monitoring of mines, slopes, and structures. Chapters discuss: basic physics of signal generation, transmission, and attenuation along the coaxial cable probe designs and procedures for calibration as well as the variation in probe responses to changes in water content and soil mineralogy variations in waveform characteristics associated with cable, deformation, cable calibration, and installation techniques for metallic cables in rock several cases demonstrating the use of TDR cables in soil as well as weathered and soft rock a rationale for the use of compliant cable in soil the use of metallic cable (MTDR) and optical fiber (OTDR) to monitor response of structures sensor/transducer components, connections from the sensors to the TDR pulser/sampler, and system control methods available software for transmission and analysis of TDR signatures The diverse interest and terminology within the TDR community tends to obscure commonalities and the universal physical principles underlying the technology. The authors seek to crystallize the basic principles among the seemingly divergent specialties using TDR technology in geomaterials. By examining varied experiences, GeoMeasurements by Pulsing TDR Cables and Probes provides a synergistic text necessary to unify the field.
