Research Achievements and Challenges: In almost 40 years of its existence as a unit under the umbrella of the U.P. College of Engineering and the National Engineering Center, NHRC has developed and served as the national center of water-resources expertise, and provided the support organization and physical facilities for conducting the necessary physical and mathematical modeling research and producing technical output and advice in water resources engineering and management needed by government and the private sector. The outputs and activities of NHRC are in the forms of improved designs and plans of hydraulic structures (developed either by physical or mathematical modeling), engineering application software, technical training and transfer of technology to clients' personnel, technical analysis and advice on particular problems, publications, lectures/seminars/conferences, and consultations and meetings with various concerned sectors in the water resources field.