Spatial Flood Potential Mapping with Flood Probability and Exposure Indicators of Flood Vulnerability: A Case Study from West Bengal, India
DOI:
https://doi.org/10.15273/ijge.2017.03.009Keywords:
assessment, probability, danger level, exposure indicator, flood potentialAbstract
Flood is an annual event in the district of Jalpaiguri. Almost all the administrative blocks of the district are more or less flood prone. Numerous rivers and rivulets are originated and pass through this district, which create floods mainly on account of rainfall in the source regions of these rivers, apart from rainfalls in the district itself. The shivering rivers during monsoon periods carry massive discharge and frequently cross danger levels. Danger level is the threshold level of water from which the event is considered as a flood. The probability of the occurrence of flood can be calculated with the past records of flood events in flood prone areas. On the other hand, the vulnerability of flood events is entirely dependent on the exposure of the area. Exposure of the area and the probability of the adjacent rivers can explain how much this area is subject to floods. In this paper, the authors tried to prepare a spatial flood potential map for the entire district based on probability analysis and an exposure indicator.
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