"Professor Acevedo's considerable experience in teaching graduate-level courses in environmental modeling has been nicely captured in this excellent and accessible textbook. He covers the field in sufficient breadth to introduce the student to virtually all aspects of environmental modeling, with sufficient depth to convey both the theory and practicality of each topic. This book particularly excels in its hands-on approach, guiding students through its many exercises and computer sessions so that understanding of each topic is achieved, and the student is provided with the tools necessary to delve further into developing and applying quantitative models for environmental studies. Professor Acevedo's book challenges students to think through not only the what and the how of modeling, but also the why. Thus, he has successfully achieved his central objective, to present a unified method of teaching that is commensurate with the interdisciplinary and quantitative approaches required today to study and understand complex ecological systems."—Mark A. Harwell, Harwell Gentile & Associates, LC, Port Orange, Florida, USA"Acevedo’s new text for environmental simulation is a welcome addition to those now available. The text is based on R (a package of models accompanies the book), and this choice makes it a useful option. The presentation is aimed at classes for early graduate students in the environmental sciences and engineering, but the rigor and hands-on nature of the advanced chapters are complemented by still advanced but accessible introductions to the necessary math and modeling concepts. Courses taught with this text will be challenging, potentially fun, and a great jump-start in environmental simulation for grad students."—George P. Malanson, University of Iowa, USA