EN
The recognition of water relations originated in the valley of Narew river after its regulation was a aim of research carried out in the period 1991-1994. The description of model of water distribution in branched network of channels, which determines cause for settlement of water management principles, was an objective, also. The studies of water distribution were carried out in the part of river valley within Park from Kruszewo section to the weir in Rzędziany. The analysis of results of prognostic calculations executed for wide range of water-flows and changes of upstream water level at a weir was represented in the paper.