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Flood is a natural disaster in this country. However human activities in many circumstances change flood behaviour. Activities in the flood plain and catchment such as land clearing for urbanisation or agriculture, construction of infrastructures such as highway and road and bridges in the flood plain may increase the magnitude of flood which increases the damage to the properties and life. The behavior of flood due to flood mitigation project such as river widening and straightening must well be understood since this kind of work may transfer the flood problem form upstream to the downstream part of the river. At present, one of the ways to study and understand the flood behaviour is by generating the flood extent or flood risk map. A hydraulic modeling especially computer model is required to carry out the flood simulation to produce flood level at various location along the river and flood plain. However, to analise a river system requires tremendous amount of data such as rainfall distribution, river properties and most important the flood plain topography. GIS software is able to handle the processing of such problem as and input to the hydraulic model. The output of th

Topics: GIS, Triangulation Irregular Network, flood, Hydrodynamic modelling, flood plain, flood risk map, InfoWorks RS
Year: 2009
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