Includes bibliographical references and index.

Water Quality in the Context of Water Resources Management -- Basic Notions -- Mathematical Interpretation of Pollution Transport -- Fundamental Expressions -- Dispersion in Rivers and Streams -- The Biochemical Pollution -- The Most Frequent Pollutants in a River -- Temperature Dependence -- Application of the General Differential Equations -- The Steady-State Case -- Interpretation in Finite Terms -- Progress in Numerical Modelling: The Finite Difference Method -- The finite element method -- The finite volume method -- Multidimensional approach -- Thermal pollution -- Optimisation models - Model calibration and verification -- Water quality measurements and uncertainty -- Model reliability -- Final thoughts and future trends.