This book comprises of the edited proceedings of a seminar on environmental modelling. It provides a comprehensive overview of current environmental problems and the progress achieved in their numerical simulation.

This book presents the Proceedings of the Fourth International Conference ENVIROSOFT 92. Since the beginning of this conference cycle in 1986, EN- VIROSOFT has provided a forum for discussion and debate for scientists, engineers and decision makers involved in the development and application of computer techniques to environmental sciences. Our main goal is to pro- vide an opportunity for cross-fertilization among the several groups involved in the study of the environment. A couple of years ago a reviewer of ENVIROSOFT 90 made a very in- teresting and appropriate comment. He congratulated us...

Finishing this book is giving me a mixture of relief, satisfaction and frus- tration. Relief, for the completion of a project that has taken too many of my evenings and weekends and that, in the last several months, has become almost an obsession. Satisfaction, for the optimistic feeling that this book, in spite of its many shortcomings and imbalances, will be of some help to the air pollution scientific community. Frustration, for the impossibility of incorporating newly available material that would require another major review of several key chap- ters - an effort that is currently beyond...