J. Punithavathi , S.Tamilenthi and Baskaran
This present study flood zone mapping was carried out in GIS. I have taken into Thanjavur district and Tamil Nadu. The study area is mainly for deltaic and plain area and especially the district is ‘Rice bowl of Tamil Nadu’. The area is mainly for monsoon area. The monsoon is very very important in this area. So the suitable for the climate and the agricultural activities are well developed in this area. There are two types of monsoon is available in this area. Mainly for North East monsoon and South West monsoon area. North East monsoon is mostly affected in this area mainly for the month of November and December. The monsoon is mainly affected by agricultural lands, buildup lands and 50% of Roadways are mostly affected. I have mainly taken into analyze the flood affected details in this district in the year of 2010. Yearly once this type of natural disaster or heavy rainfall (flood) affected in this area. As Floods continue to pose the greater threat to floura, fauna and properties. An assessment in required to evaluate the flood prone areas. The toposheets on 1:50000 scale used along with auxiliary data to access and map the flood zones in Thanjavur district.
