Assessment of changes in rainfall and temperature pattern in tamil nadu state using gis and remote sensing techniques

Global warming has become a threatening phenomenon for all living organisms on the earth as it leads to changes in rainfall distribution and increases the temperature. This issue has not only affected the life of people in the developed nations but also in the developing countries like India. India being an agrarian country the variations in climate affects its economic productivity and development. Tamil Nadu state heavily depends on monsoon rains, and therefore is prone to drought when the monsoon fails and flood occurs when there is heavy rainfall. According to the review the rainfall and temperature are the two major climate related factors directly continuing to the change. Therefore, this study made an attempt to assess the various changes rainfall and temperature pattern in Tamil Nadu state from 1901 to 2009. For the study the average, minimum and maximum rainfall and temperature data were used. For the changes were identified using Interpolation Techniques. In addition the coefficient of variation in rainfall were also calculated and mapped in ArcGIS software.