Introduces essential concepts of pollutant fate and transport using hands-on model building approach. This book gives a refresher on pertinent theory with special emphasis on obtaining fluxes and mass-loadings for various physical, chemical and biological processes in natural and engineered systems which are part of the mass-balance formulation.

As all the models are derived using a commonly available spreadsheet program and are illustrated in detail, the book will also appeal to self-learning environmental engineering practitioners. Despite their introductory nature, the models presented here can be useful for making initial estimates and design calculations and carrying out preliminary planning and feasibility studies. The material presented in this book is expected to provide the necessary background to understand advanced modeling texts and journal articles.

Introduction
Environmental Systems
Mathematical Models for Environmental Systems
Fundamental Quantities for Building Mathematical Models-Concentration
Fundamental Quantities for Building Mathematical Models-Rate Measures
Fundamental Transport Processes
Abiotic and Biotic Reactions
Interphase Mass-transfer-Kinetic Theories
Interphase Mass-transfer-Equilibrium Partitioning
Reactors and Mass Balance Expressions
Mass-Balance Equations - Other Salient Concepts
Computing Tools for the Model Development
Implementing Root-finding in MS-EXCEL
Matrices and Linear System of Equations
Optimization Methods for Solving Linear and Nonlinear Equations
Analytical Methods for First-Order Ordinary Differential Equations
Numerical Methods for Solving First-Order ODEs
Methods for Solving Second-Order ODEs
Analytical and Indirect Approaches for Solving Partial Differential Equations
Finite-Difference Approaches for Solving Partial Differential Equations
Methods to Evaluate Definite Integrals
Data Compilation, Parameter Estimation and Model Calibration
Model Sensitivity and Uncertainty Analysis
Steps in Carrying out a Modeling Project
Advanced Model Formulations and Algorithms
References.