* Flooding:The region or happening: floods in the Red River Delta region, the Mekong River Delta, depressions in the North-Central Plains and lower the large river in South Central.* Flash floods-Flash floods occurred in the basin of the rivers and streams have dissected the topography mountains, big slope, lost the coating plant, the soil surface (due to denudation when there are heavy rains, flash floods in the North. usually happens in the month of VI-X, concentrated in the mountains of the North. In Central, on the X-XII 10 scan also occur in many places.
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