A key primer for undergraduate students, A Practical Introduction to Environmental Modelling will teach them how to develop and use computerized models to represent climatic, biogeochemical, ecological and urban systems. The textbook presents environmental modeling 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 then provided for complete understanding and practice. A CD -ROM accompanies the book, providing free software tools and data sets.