Herman Depeweg , his research topics at Delft Hydraulics were related to hydraulic structures and sediment transport. He joined IHE in 1986 to lecture in hydraulics, computer applications and irrigation with the focus on all engineering aspects of irrigation at main, tertiary and field level. At IHE he has guided several MSc and PhD researches in sediment transport and has given guest lectures for UNESCO-IHE around the world. Krishna Paudel obtained in 2010 his PhD degree and his research topic has been the role of sediment in the design and management of irrigation canals. He has more than 24 years' experience in the planning, design, construction, monitoring and management of irrigation projects. Currently, he is associated with Consolidate Management Services, Nepal and provides his professional expertise in water resource development projects. Néstor Méndez obtained in 1998 his PhD degree and his research topic has been the transport of sediment in irrigation canals. He has been associate professor at the Universidad Centro Occidental 'Lisandro Alvarado' at Barquisimeto, Venezuela. Since 1999, he is also guest lecturer at UNESCO-IHE and at several universities in South America. At present, he is active as consultant in land and water development in Venezuela.