This report describes a numerical software for the simulation of shallow water flows by means of the hyperbolic Saint-Venant equations. The main target is the development of graphical interface that allows the users to exploit the computation without resort to a direct use of the underlying numerical scheme. The first part briefly introduces the physical framework and presents a finite volume kinetic scheme to compute approximate solutions to the Saint-Venant system with a geometrical source term, which satisfies some fundamental properties (positivity of the water height, preservation of the steady states, entropy inequality). The parameters of the experimental setting are given, as derived from experimental studies realized at the Institut de Mécanique des Fluides in Toulouse, France. The second part of the report is devoted to a detailed description of the software, including the instruction for installation, system requirements and hardware architecture, and a step-by-step illustration for optimal running. It is worthwhile observing that the development of new informatics facilities causes numerical software to become rapidly obsolete, although the one presented in this report has been built using tools whose improvements are supposed to remain coherent with the previous versions. (The source codes are available upon request to the authors.)