This call for projects is in the context of ACROSS, hosted in Thuyloi University (TLU), Hanoi, under the authority of the Ministry of Agriculture and Rural Development (ODA project 3355/QÐ-BNN-HTQT). ACROSS (for “Advanced Computational Research for Sustainability Science”) is a new laboratory jointly established by the French Institute for Sustainable Development (IRD), TLU, Hanoi Architectural University (HAU) and Toulouse Computer Science Research Institute (IRIT) to design modeling and simulation tools in support of a scientific approach to sustainability in the management of irrigation systems in Vietnam. ACROSS will promote a progressive, problem-oriented methodology to organize the contributions of scientists, students and practitioners on several case studies (Bac Hung Hai in the Red River Delta, Ta Trach in the centre, Dak Lak in the highlands and Duc Hoa in the Mekong Delta).