EN
Three physicogeographical mesoregions which are adjecent to Warsaw to its West occupy various hypsometric levels and display the features of the spatial setting of cascade structure. Individual altitudinal degrees (links) of the setting are connected via hydrological migratory flow, directed from the autonomous landscapes of Rawa Upland towards North. On the slopes of the Upland, fulfilling the role of transitory landscape units, the gradient of the flow is at some 5 per mille, and the significant degree of erosion of the glacial forms appearing here results in low contents of calcium (up to 60 miligrams per litre) and magnesium (usually less than 7 mg/l) in water solutions. Błonie Plain, taking the middle link in the setting is formed by the supraqual geocomplexes with weakly alcalic and gley enviromnents of hypergenetic zone. Groundwater in this subordinate landscape unit, richer in calcium (up to 300 mg/l) and magnesium (some 40-70 mg/l), displays a slight inclination (approx. 0,8 per mille) in Western direction. The thus important differences in physical and chemical parameters of the flow (migration medium) result inevitably in a barrier effect, especially strongly marked along the border of Błonie Plain with Rawa Upland. A narrow zone of geocomplexes displaying, for instance, very high ferrous and calcary contents persists there. Warsaw Dale, occupying hypsometrically the lowest degree of the whole setting has only in its Southern fringe part the features of a unit subordinated with regard to Błonie Plain. This third unit is in its greater part covered by the systems of dune and peat-gley geocomplexes displaying, in principle, autonomy of their functioning.