This text introduces engineering students to the principles and practice of engineering hydrology and shows, through examples, how to approach the apparently intractable problems which hydraulic engineers meet. The last decade has been a time of considerable activity in the subject, following the publication of the Flood Studies Report by the Institute of Hydrology. Examples of this on-going work include advances in urban hydrology, published as The Wallingford Procedure; the Low Flow Studies, the Flood Studies Supplementary Reports and the World Flood Study from IOH and the Manual for Estimation of Probable Maximum precipitation from the World Meteorological Organization. Short descriptions of some of these subjects have been included in this edition and the opportunity has been taken of enlarging the lists of problems, re-organizing chapters, updating references and including relevant new material. An ELBS/LPBB edition is available.