This book is the third volume of a series: "Advances in Porous Media". Our objective is to present in-depth review papers that give comprehensive coverage to the field of transport in porous media. This series treats transport phenomena in porous media as an interdisciplinary topic. Thus, "Advances in Porous Media" will continue to promote the extension of principles and applications in one area to others, cutting across traditional boundaries. The objective of each chapter is to review the work done on a specific topic including theoretical, numerical as well as experimental studies. The contributors of this volume, as for previous ones, come from a variety of backgrounds: civil and environmental engineering, and earth and environmental sciences. The articles are aimed at all scientists and engineers in various diversified fields concerned with the fundamentals and applications of processes in porous media.