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… over a half of the agricultural land in Estonia is under drainage systems. The roots of a willow (which is suitable … plantations in Estonia) may cause damage to the drainage system. In cases where willows would be grown in areas with drainage systems, permission by the local land improvement …

… and gas), drilling and well treatment fluids, process and drainage water, and sewage and domestic wastes. Excavation … infrastructure sites can alter existing watercourses and drainage patterns with marked effects on vegetation and … that thaws in the summer, forming a complex pattern of drainage and vegetation. Melting ground ice causes land …