Established in 1935, the International Association for Engineering and Research in the Hydro-Environment (IAHR) is an internationally autonomous body of engineers and water experts working in the fields of hydro-environmental sciences and their practical application. It supports and encourages both research and its application while striving to lead to sustainable development, optimization of the management of worldwide water resources, and industrial flow processes. Through engaging in international projects such as UNESCO, WMO, IDNDR, GWP, ICSU, and through collaboration with other water-related (inter)national bodies, the IAHR achieves its aims through a wide range of member events, including working groups, research agenda, congresses, specialty conferences, seminars, and short courses; journals, monographs, and proceedings. In September 2014, during the twenty-seventh IAHR Hydraulic Machinery and Systems International Conference, the IAHR Academic Committee announced the establishment of the IAHR Hydraulic Machinery and Systems in Asia Working Group (AWG-IAHR) to align with the direction of hydropower production in Asia. The IAHR consists of 3 academic sessions covering its 16 technical committees, the IAHR AWG belongs to the Hydraulics Committee (IAHR Hydraulics), one of the 6 Water Conservancy Machinery Committees, and the Systems Committee (Committee on Hydraulic Machinery and Systems). The international conference, held every two years, has the utmost influence in the field of hydraulic machinery.
Professor Wang Zhengwei, as head of this working group, coordinated IAHR of the Asian Hydraulic Machinery Association at Tsinghua University with the first AWG-IAHR Symposium on Hydraulic Machinery and Systems on 16-19 November 2017. After two years, representing IAHR Asia Working Group(AWG) IAHR-Asia 2019 was held on 24-25 September 2019 in Busan, Korea chaired by Prof. Young-Ho LEE. Following the convention of organizing the IAHR-Asia conference every two years, the third edition of its kind will be held as IAHR-Asia 2021 in Kathmandu, Nepal organized by the Turbine Testing Lab of Kathmandu University in November 2021 chaired by the vice-chancellor of the Kathmandu University Prof. Bhola Thapa.