The SIC software (Simulation of Irrigation Canals) is one of the latest hydraulic models developed by Cemagref. The first developments on hydraulic numerical modeling started at Cemagref in the early 1970's. Lots of improved and updated versions have been made since this period. Right now, several hydraulic models exist at Cemagref, depending on the type of systems and events to simulate (rivers, irrigation canals, dam break, drainage systems, etc.). One of these models has been particularly dedicated to irrigation canals. This model, called SIC, has been adapted from another hydraulic model, where some features have been removed, new ones have been introduced, and for which special user-friendly interfaces have been developed. It was also adapted to run on currently available IBM PC computers or compatibles. It can be used both by engineers and by canal managers.The very first version of this model has been developed for the I.I.M.I. (International Irrigation Management Institute) on a real canal located in the south coast of Sri Lanka (Kirindi Oya Right Bank Main Canal). One purpose of this model was to be easily usable by canal managers as a decision support tool, in order to help them in the daily operation and maintenance of their system.Since this first application was promising, Cemagref, with other partners, decided to develop a new standard version of this software, that could be used on most of the irrigation canals world-wide. A study Advisory Committee has been set up to decide the required features of the model, and follow its development. This Committee led to the SIC User's Club with representatives of the different partners: BCEOM, CACG, Cemagref, CNABRL, ENGREF, IIMI, LAAS, LHF, MAE, MRE, MCoop., OIE, SCP and SOGREAH (Cf. Annex 1 for acronyms). One main purpose of this Club was also to foster communication among model developers and users. It allows to share experiences, new developments, needs of improvements, etc.