Ukrainian Journal of Forest and Wood Science

Since the 90s of XX century the supporting of the existing drainage system had stopped. As a consequence, repeated waterlogging of previously meliorated lands, deterioration of hydrophysical properties of soils and the development of a number of degradation processes occur resulting in health deterioration of forest stands in a number of state forestry enterprises. The correlation analysis was made for the dynamics of farmland areas for the period 1990-2011 and areas of selective sanitary felling in adjacent forests. The results suggest that in the Seredyna-Buda administrative district (State Enterprise “Seredyno-Budske Forest Economy”) the change of area of farmlands with groundwater levels of 0.75-1.25 m promotes direct change in sanitary felling areas in the 3rd-5th year after the event. Relationships between changes in the area of lands with ground-water level of 0.5-0.75 m and volumes of selective sanitary felling are inverse, with a maximum in the fourth year. In the Konotop administrative district (State Enterprise “Konotopske Forest Economy”), health conditions of the stands improve and volumes of selective sanitary felling reduce when the land area with the level of ground-water occurrence of 1.25-1.5 increases, and vice versa: planting health conditions deteriorate in 2-3 years after the area of land with high ground-water level increases.

drainage melioration, ground-water, sanitary felling