The occurrence of exceptionally heavy rainfall events and associated flash floods in many areas during recent years prompted the researchers to study long-term changes in extreme rainfall over India.
Understanding the changes in extremes weather events is more important than the changes in mean pattern for better disaster management and mitigation. The analysis of the frequency of rainy days, rain days and heavy rainfall days as well as one-day extreme rainfall and return period has been carried out in this study to observe the impact of climate change on extreme rainfall events and flood risk in India.
The study tries to bring out some of the interesting findings that are very useful for hydrological planning and disaster management. Extreme rainfall and flood risk are increasing significantly in the country except some parts of central India. The study broadly indicates that the frequency of heavy rainfall events are decreasing in major parts of central and north India while they are increasing in peninsular, east and north east India.
This study reveals the noticeable changes in the extreme rainfall events that occurred over India in the past century. They are -
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