The Channels of the Danube Delta, romania Big willows, alder and ash trees from a riparian forest along the cahnnels Only during September large parts of the Delta dry out, high water marks on the trees are still showing the water level during the sprin. The Channels of the Danube Delta, romania Big willows, alder and ash trees from a riparian forest along the cahnnels Only during September large parts of the Delta dry out, high water marks on the trees are still showing the water level duri