Civil engineering involves planning, designing, constructing, and maintaining structures and infrastructure. The document outlines the main branches and scope of civil engineering. It discusses surveying and leveling, building planning and construction, advanced construction techniques, structural engineering, geotechnical engineering, water resources engineering, transportation engineering, environmental engineering, and town planning. Civil engineers work on projects before, during, and after construction through tasks like feasibility studies, design, project management, construction supervision, and maintenance.