The situation of lands arranged with drainage works from the Dragoieşti-Berchiseşti system, Suceava county

The surface and subsurface drainage systems carried out for eliminating the excessive moisture on agricultural lands were designed with respect to the exploitation of surfaces on the drainage sectors. When establishing and rebuilding the ownership right (1991 year), the orientation of the drainage lines and the drainage channels network was not considered. Thus, the terrain plots are located perpendicularly, parallel or at a sharp angle to the tile drains and / or drainage channels. This paper present aspects of removal of excess water from agricultural lands arranged with drainage works and exploited on parcels oriented along the level curves and perpendicular to them respectively. The different soil works performed on each individual plot has led, in time, to land shaping in ridges and furrows of variable widths, level differences and transverse slopes, depending on the width of the plots, on the manner in which they are used and on the machinery employed for the agricultural works conducted. The modelling of land in ridges and furrows causes an uneven removal of water excess from the soil surface. In the parcels oriented along the level curves, the modelling of the land causes the stagnation of water on trenches, prolongation of water excess, gradual passing from the category of arable use to hayfield and the installation of hygrophilous vegetation. The modelling of the land to parcels oriented perpendicularly to level curves the removal of water excess, which allows the performance of spring agricultural works in good conditions and in due course, ensuring the acquiring of high production