Modeling of motion of water in conducting channels of polder systems

Based on the theory of directed graphs there are the crunches of graph bypassing of polder systems, alongside of which Saint-Venant’s equations integration system are carried out. The latent conservation difference schemes for hyperbolic equation system, taking into consideration the flow preservation laws at the channel joints have been developed. The question of setting up border conditions correctness have been discussed. The algorithms of number solutions of difference equation and number calculations results meeting the field experiments data have been suggested.