Abstract
Flooding is always a severe thread to urban areas, causing extensive damage to houses, buildings, public infrastructure and human life. In recent years, due to the effects of El Nino and La Nina, more and more ocean storms and heavy rain have been occurring. Besides, in the process of urbanization, the growing use of concrete to build urban infrastructure has decreased the natural surface infiltration. Consequently, when heavy rain happens, flooding occurs more frequently because of the overloaded drainage systems. Recently, Ha Noi has suffered heavy flooding after prolonged rain. The purpose of this article is to analyze flood situation due to heavy rain in Ha Noi (in 2008 and 2013) in order to localize the risk of flooding in Ha Noi by using remote sensing and GIS data. The content of the methodology is to use satellite images to identify and extract flooded areas because of the prolonged periods of heavy rainfall and then use some analytical methods to implement the subject’s target.
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