This book examines water resource engineering as an integrated discipline concerned with the planning, development, protection, and regulation of surface and subsurface water systems. It explains engineering principles used to assess hydrological behaviour, environmental impacts, and infrastructure performance within river basins and coastal regions. The discussion addresses quantitative assessment, indicators, and regulatory frameworks that guide allocation, conservation, and quality protection. Attention is given to interactions between engineering design, ecological stability, and legal governance under changing climatic and societal pressures. By linking scientific analysis with policy and management perspectives, the book provides a coherent framework for evaluating water systems, supporting sustainable utilisation, risk mitigation, and long term resilience in complex hydrological environments.

It is intended for students, engineers, planners, and policy professionals engaged in water resources practice. The book serves as an academic reference and practical guide for engineering analysis, regulatory interpretation, and strategic planning. It supports informed decision making, compliance with water quality standards, and balanced management of water resources within regional, national, and international development contexts across public institutions, infrastructure agencies, and multidisciplinary environmental management programmes worldwide today applications.