From the reviews:„Merkel and Planer-Friedrich … provide an excellent introduction to hydrogeochemical modeling for analyzing natural and human impacts on aquatic systems. … it is intended as a practical guide to modeling, but it will make an excellent supplementary resource for the students. Summing Up: Highly recommended. Upper-division undergraduates through professionals.“ (M. S. Field, CHOICE, November, 2005)„This book focuses on giving practical support for geochemical modelling … . Is it worthwhile to buy this book … ? Absolutely yes! … Altogether 69 clearly and carefully explained exercises are provided to enhance the knowledge step-by-step. … This book is recommended to all those with some basic hydrogeological or chemical understanding, to graduate students in geosciences, environmental sciences or related studies as well as to representatives of public authorities and enterprises who want to understand the hydrogeochemical interactions better.“ (Andreas Winkler, Environmental Geology, Vol. 48, 2005)