Flood Mapping And Flood Damage Estimation Using GIS

Flood mapping has been used widely in many countries nowadays as a method to
encounter this natural hazard phenomenon. In the past few years, studies about the
flood analysis and modeling used to take years. But now, with the facilitation of
Geographical Information System (GIS) automated process, the studies are faster
and even accurate in modeling the flood inundation area. The used of GIS is
essential as a planning tool for floods, educating the populations at risk and
managing floods as they actually rise. Features in the GIS itself such as the 3-D
Visualization and detailed hydrological characteristic help a lot in defining areas
which is vulnerable to flood. Generally, flood mapping can identify the effects of
flooding and those effects are represented in hazard and risk mapping. The main
advantage of using GIS for flood management is that it not only generates a
visualization of flooding but also creates potential to further analyze this product to
estimate probable damage due to flood. This paper is to demonstrateth e use of GIS
in constructing the flood map at studies area. The map then are derive into Digital
Terrain Model (DTM) to make the identification in flood vulnerable areas easier
which provide high detailed representation of the topographical variations in the
Earth's surface.