A key primer for undergraduate students, Practical Introduction to Environmental Modelling will teach them how to develop and use computerized models to represent specific systems: * climatic * biogeochemical * ecological * urban systems. The textbook presents environmental modelling in a practical way, clearly illustrating the various stages in the conception mathematical formulation, computational implementation, sensitivity analysis, validation and use of a range of simple environmental models. The essential analytical and practical skills are provided for complete understanding and practice. A CD - ROM accompanies the book, providing free software tools and data sets. Barnsley; M.J. University of Wales, Swansea, Wales,