Establishment of Flash Flood Risk Map, Reduce It is Harmful Effect

Abstract

Application of GIS, RS, and software: MILE 11, Mike 21, NDIV, SLOPE, SPOT 4, DEM, the building of digital elevation models DEM thence to determine the parameters of the slope and valley shape at flash floods risk. The satellite image interpretation allows calculating its cover level and determining the density of distributed plants. Combining this information with the maps of soil and rock types allows the establishment of a zoning map of flash flood risk in DakLak province. In the research scope of this topic, the areas of permanent flash floods occurrence mentioned in DakLak province, Central Highlands. Stemming from the topographical characteristics and river network distribution as well as related characteristics in the province of DakLak, the flow feature has quite different. That is, some areas only have normal floods, and inundation, while some places have frequent flash floods. The consideration results, and survey together with the synthetic analysis, we assess that Dak Lak province has five areas prone to flash floods, in other words, there are five main areas at very high risk of flash floods: Based on the actual conditions of DakLak province: highly divided topography, limited vegetation, high annual rainfall, and dense irrigation system, the research team has proposed appropriate solutions: