Urban Heat Island Mapping For Bangkok City Using Remote Sensing Techniques

Name: Degala Raghu Veer

ID: – 

Title: Urban Heat Island Mapping For Bangkok City Using Remote Sensing Techniques

Type: Thesis

Abstract

The urban temperatures are increasing globally, in some urban places the urban heatis restoring because of high dense concrete constructions development in bothhorizontal and vertical directions these zones are called Urban Heat Island(UHI). The increasing of temperature when we travel from rural region to urbanregion shows that impact of land cover discrepancy. Generally, the temperaturevariation between the rural and urban should be about 5.6 0C. In this researchwe considered the mixed classes for land use and land cover analysis speciallyto study more on the built up area in the Bangkok city. In case of Bangkok citybased on the grid base analysis the grids which are having the highestpercentage of built up, located in the center of the city and industrial areasis restoring heat. Bangkok city UHI value in November 3.13 0 c, in December3.370 c, 2.240 c, 3.470 c and 3.560 c, in January 3.370 c, 2.830 c, 2.83 0 cand 3.390 c and in February 3.220 c, 4.180 c, 2.74 0 c and 3.80 c. The averageUHI temperature for winter season of 2015 is 3.240 c with standard deviation 0.505. Since the standard deviation value is very less this shows that UHI dataset is very close to the mean UHI which signifies the consistency of UHI temperature in the winter season for 2015. The highest difference oftemperature noted in the month of the February. From the results we can saythat the grids that are consider as UHI are having more than 70% covered by the built up so they are repeatedly falling in critical and along the boundary of theBangkok city even though the grid is having the more built up it is notconsidered as the UHI because there is heat exchange between the adjacent landcover respectively, which moderated the temperature. If the count is 13 thesezones are located in core city zone with high percentage of built up. If weconsider 85.33 % as mark for UHI about 50 grids are under UHI zones which mean200 sq.km of total area under the UHI.

Keywords: Air temperature, UHI, Urban CommercialFactor, Urban center

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