Individual #hydraulic_engineering__hydraulicengineering  the branch of civil engineering dealing with the use and control of water in motion
  >part of:  civil_engineering__civilengineering  the branch of engineering concerned with the design and construction of such public works as dams or bridges
     >part of:  engineering_science__engineeringscience__engineering__applied_science__appliedscience__technology  the discipline dealing with the art or science of applying scientific knowledge to practical problems; "he had trouble deciding which branch of engineering to study"

No statement uses or specializes hydraulic_engineering; click here to add one.