Application of flood marks management system to establish rehabilitation plan of reducing natural disaster
Ha, Hyunjung
On July 2011, Korea suffered from tremendous rain recorded 40% of annual precipitation for only 3 days, and it caused both a terrible loss of human life and property. It shows vulnerability of natural disaster prevention or emergency plan such as by floods, typhoon and inundation. Up to date, natural disaster prevention plan has been mostly compensation for the loss and rehabilitation with government aids, exchanged highly precise instrument for forecasting weather and structural method like supplying drainage system. However, because of an unusual change of climate for global warming, disaster prevention plan must need simulation of predicting inundation based on making a proper flood marks map. The point is that real-time observation system and accumulation of data should be managed continuously. Accordingly, out of designing paper map without unity, Korean Cadastral Survey Corporation is exclusively taking responsibility for flood marks map and sends to local government through computerized management. If inundation damage breaks up in some area, control point surveying is previously performed to survey damaged area and height and true elevation of flood is observed from approved control point in flooded area. After calculating measured surveying data by software in Total Surveying System v.2, made from Korean Cadastral Survey Corporation, digital map expresses flood marks map and this will be accumulated on Flood Marks Management System in our own website. Since the flood marks database consists of various spatial information contained drainage facilities and prevention equipment, it can apply flood area estimation maps as well as flood hazard maps. As a result, this is the basic factor to establish rehabilitation plan of reducing natural disaster of local/central government.
Event: FIG Working Week 2012 : Territory, environment, and cultural heritage
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