Hydraulic research is developing beyond the borders of traditional civil engineering to meet increasing demands in natural hazards, structural safety assessment and also environmental research. Hydraulic Engineering III contains 62 technical papers from the 3rd Technical Conference on Hydraulic Engineering (CHE 2014, Hong Kong, 13-14 December 2014), including the 2014 Structural and Civil Engineering Workshop (SCEW 2014) and the 4th Workshop on Environment and Safety Engineering (WESE 2014). The contributions reflect recent advances, discuss problems and identify challenges associated with engineering applications in hydraulic engineering, and showcase recent developments in the areas of hydraulic engineering and environmental engineering, and other related fields. Hydraulic Engineering III includes a wide variety of topics: hydraulic engineering (river engineering and sediment transport, waterway engineering, flood hazards and innovative control measures, geotechnical aspects in hydraulic engineering, rainfall modelling, water resources and water treatment, hydraulic structures, modelling technology in hydraulic engineering), structural and civil engineering (mechanics in engineering, and new structural advances such as reinforced concrete beam by high titanium blast furnace slag), and environmental issues (environmental fluid dynamics, environmental hydraulics and hydrology, and the environmental prediction and control techniques in waste and pollution, water pollution and ecosystem degradation, coastal engineering). Hydraulic Engineering III will be invaluable to academics and professionals in both hydraulic and environmental engineering.