This lecture covers a comprehensive overview of water resources management, including the analysis of surface and groundwater resources, distribution systems, economic evaluations, and risk assessments related to hydraulic structures. It also delves into the economic fundamentals, evaluation methods, and the impact of water usage on the environment. The presentation explores the water cycle, hydrological concepts, and the management of water in lakes, reservoirs, and wetlands. Additionally, it discusses the challenges posed by climate change, extreme events, and human activities on hydrological systems.