Grebin V. Regional landscape-hydrological analysis of modern streamflow regime of rivers in Ukraine

General statements, conceptions, principles and main criteria of methodology of landscape-hydrological analysis aiming its applied usage for the territory of Ukraine are grounded and improved. Hierarchy classification of landscape-hydrological systems of different levels with dividing of two main levels of landscape-hydrological differentiation - zonal and country, is elaborated. For the first time landscape-hydrological zoning of a territory of Ukraine was done. Selection of temporal scopes of a period of hydrological regime of Ukrainian rivers which was changed is substantiated. It was confirmed that climate factors changes (amount of precipitations and evaporation) determine modern changes of annual distribution of a streamflow of rivers in Ukraine. It was proved that changes of constituents of water-thermal balance caused some changes on river alimentation, in particular, decreasing of a part of alimentation by snowmelt and increasing of a part of baseflow. As a result it cause the smoothing of annual distribution of a streamflow due to decreasing of a part of runoff during spring flood and increasing of a part of runoff during low water.