Vannak Ann is an eco-hydrologist holding a PhD in Water Science and Technology with an Excellent (2015, UdG – Spain), MSc in Agronomy and Bioengineering [2007, GxABT of ULiège (ex-FUSAGx) – Belgium] and an Engineer’s Degree in Rural Engineering (2006, ITC – Cambodia). For his doctoral research, Dr Ann focused mainly on sediment physical characteristics affecting biogeochemical processes in riverbeds, especially the biofilm biomass and enzymatic activity in hyporheic zones. At present, the main focus of his research is the application of statistics and machine learning to ascertain the influence of environmental factors (such as hydrological, physical, chemical and biological) and their variability on micro-and macro-organisms, as well as on the ecological functioning and biodiversity of the Lower Mekong Basin. He is also interested in modelling hydrological processes (at a watershed scale) and climate change-related topics. He has been involved (as PI/co-PI or member) in several projects that relate to the integration of social, ecological and hydrological research.