The metropolitan of Hyderabad is among the top five in India with an average area of 625 km2. Recent surveys of the city shows an alarming population growth rate, since the previous decade. This is causing the lateral expansion of the urban extents towards the surrounding rural area. In the current research, MODIS thermal remote sensing data is used to derive the land surface temperature (LST) over the city of Hyderabad for a period of 15 years. An urban heat island phenomenon is evident over the city with a gradual increase in its magnitude over the years from 2000 to 2015. A Gaussian fitting algorithm is performed to highlight the heat island signature with respect to the surrounding rural region. The study reveals the variability of UHI over the city for the summer season. The night time LST shows an increasing trend in the UHI magnitude for a period of 15 years. An overall increase in the urban heat island magnitude and extent is profoundly visible over the region. The city of Hyderabad shows a rate of lateral expansion 0.8km2 annually from 2001 to 2005.An increase of the rate to 1.5 km2 annually is evident from 2005 to 2010, the city shows a remarkable growth with a rate of 3.2km2 during the last 5 years from 2010 to 2015, which is double the rate that of the previous 5 years
A remote sensing approach to study the temporal growth of the urban limits for the city of Hyderabad from 2001-2015
BONAFONI, Stefania
2016
Abstract
The metropolitan of Hyderabad is among the top five in India with an average area of 625 km2. Recent surveys of the city shows an alarming population growth rate, since the previous decade. This is causing the lateral expansion of the urban extents towards the surrounding rural area. In the current research, MODIS thermal remote sensing data is used to derive the land surface temperature (LST) over the city of Hyderabad for a period of 15 years. An urban heat island phenomenon is evident over the city with a gradual increase in its magnitude over the years from 2000 to 2015. A Gaussian fitting algorithm is performed to highlight the heat island signature with respect to the surrounding rural region. The study reveals the variability of UHI over the city for the summer season. The night time LST shows an increasing trend in the UHI magnitude for a period of 15 years. An overall increase in the urban heat island magnitude and extent is profoundly visible over the region. The city of Hyderabad shows a rate of lateral expansion 0.8km2 annually from 2001 to 2005.An increase of the rate to 1.5 km2 annually is evident from 2005 to 2010, the city shows a remarkable growth with a rate of 3.2km2 during the last 5 years from 2010 to 2015, which is double the rate that of the previous 5 yearsI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
