This book deals with the concept of moments, and how they find application in subsurface hydrologic problems-particularly those dealing with solute transport. This book will be very valuable to researchers who are beginning to learn about moment analysis, and will also be of interest to advanced researchers as well. Both temporal and spatial moments are dealt with in some detail for a wide variety of problems. Several examples using experimental data, both from laboratory columns and field experiments, are provided to give the readers a clear idea about the scope of this method. Apart from conventional uses of moments for solute transport problems, this book contains chapters dealing with use of moments in interval computing, vapour phase transport applications, transfer functions to subsurface tile drains, and construction of breakthrough curves from knowledge of moments.

Contenu

Random Variables and Generating Functions.- Laplace Transforms for Solute Transport Models.- Fourier Transforms for Solute Transport Models.- Transfer Function Approaches.- Temporal Moment Analysis for Solute Transport in Porous Media.- Spatial Moment Analysis for Solute Transport in Porous Media.- Moment Analysis for Volatile Compounds.- Moment Generating Differential Equations.- Momemt Analysis for Compounds Undergoing Sequential Decay Chain Reactions.- Applications of Moments in Interval Computing Methods.- Moment Analysis for Subsurface Storm Flow.- Constructing Concentration Distributions from Moments.