Analysis of urban heat island intensities a case study in Chennai metropolitan

The Urban Heat Island which are those heat pockets within the Urban area where the temperatures always tend to be higher than that off the surrounding area. The mercurial temperatures won't be of great variation from the surrounding average temperatures but the other factors like humidity, emission of heat from buildings etc leads to this phenomenon. The reduction of vegetation also has increased the heat in the city. This is evident from the comparative analysis that is made between the vegetation and the hottest regions of the Metropolitan. The aim of this present research paper to understand the location and distribution of high temperature prevalence areas of the Chennai Metropolitan and to delineate them as following objectives. To Detect and delineate the areas with maximum temperature within the Urban area called as the urban heat island thereby suggesting some mitigation measures. To Calculate the Land surface Temperature prevailing in different parts of the study area. The above mentioned objectives have been achieved and completed with the help of certain methodologies. Land sat TM and ETM + image of the year 1991 and 2006 are to be used to identify the spatial distribution characteristics. Assessment of the Urban Heat Island effects using the satellite imageries is the another techniques. Land surface temperature calculation can be carried out using the Thermal bands of both the TM and ETM + which can indicate the areas with higher temperature prevalence. The analysis of the climatic parameters and to check the changing trends in the climatic pattern for the last two decades. The analysis of the temperature derivations from the thermal bands of the Land sat imageries has been made using the preparation of the temperature distribution maps.