Objectives of the book are meant to fulfill the main learning outcomes for students registered in named courses, which covered the following: - Solving problems in hydrology and making decisions about hydrologic issues that involve uncertainty in data, scant/incomplete data, and the variability of natural materials. - Designing a field experiment to address a hydrologic question. - Evaluating data collection practices in terms of ethics. - Interpret basic hydrological processes such as groundwater flow, water quality issues, water balance and budget at a specific site at local and regional scales based on available geological maps and data sets. - Conceptualizing hydrogeology of a particular area in three dimensions and be able to predict the effects on a system when changes are imposed on it. Learning outcomes are expected to include the following: - Overview of essential concepts encountered in hydrological systems. - Developing a sound understanding of concepts as well as a strong foundation for their application to real-world, in-the-field problem solving. - Acquisition of knowledge by learning new concepts, and properties and characteristics of water. - Cognitive skills through thinking, problem solving and use of experimental work and inferences - Numerical skills through application of knowledge in basic mathematics and supply issues. - Student becomes responsible for their own learning through solution of assignments, laboratory exercises and report writing. "Problem solving in engineering hydrology" is primarily proposed as an addition and a supplementary guide to fundamentals of engineering hydrology. Nevertheless, it can be sourced as a standalone problem solving text in engineering hydrology. The book targets university students and candidates taking first degree courses in any relevant engineering field or related area. The document is valued to have esteemed benefits to postgraduate students and professional engineers and hydrologists. Likewise, it is expected that the book will stimulate problem solving learning and quicken self-teaching. By writing such a script it is hoped that the included worked examples and problems will guarantee that the booklet is a precious asset to student-centered learning. To achieve such objectives immense care was paid to offer solutions to selected problems in a well-defined, clear and discrete layout exercising step-by-step procedure and clarification of the related solution employing vital procedures, methods, approaches, equations, data, figures and calculations. The new edition of the book hosted the incorporation of computer model programs for the different hydrological scenarios and encountered problems presented throughout the book. Developed programs were coded with Microsoft Visual Basic.NET 10 programming language, using Microsoft Visual Studio 2010 Professional Edition. Most of the examples herein have an equivalent code listed alongside through the text. To avoid repetition though, some example programs were omitted whenever there was resemblance to another example elsewhere, to which the reader is kindly requested to refer to.