Study on the Effects of Landcover Changes on Surface Albedo and Surface Temperature in Bangladesh Using Remote Sensing and GIS

Authors : Nasrin SULTANA, Hafizur RAHMAN, Mohammed Nur Hossain SHARİFEE, B.m. Refat FAİSAL, Md. Tofayel AHMED

Pages : 277-287

Doi:10.30897/ijegeo.546032

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Publication Date : 2019-12-08

Article Type : Research Paper

Abstract :Dynamic changes in Earth’s land cover characteristics and associated temporally evolving biophysical surface properties, as well as their ultimate impacts on surface radiative insert ignore into journalissuearticles values(surface albedo); and climatic properties insert ignore into journalissuearticles values(land surface temperature);, have been studied. The study area includes a part of southwestern Bangladesh covering a period of about twenty years from 1988 – 2011. The widely used Surface Energy Balance Algorithm for Land insert ignore into journalissuearticles values(SEBAL); has been applied in conjunction with satellite-derived radiative measurements. Relatively important land use types such as water, soil, sand, settlement, shrimp farm, forest and agricultural crop have been considered. Feature type conversion of parameters i.e Normalized Difference of Vegetation Index insert ignore into journalissuearticles values(NDVI);, surface albedo and land surface temperature have been noticed over the area under the present study. The highest surface albedo as well as surface temperature value has been noticed over the sandy area. Analysis revealed increases of surface temperature by about 1 °C and 3 °C for land cover conversion from insert ignore into journalissuearticles values(i); crop to settlement and insert ignore into journalissuearticles values(ii); water to soil, respectively. All other categories of landcover conversion generally experience decreases in surface temperature. Spatial vegetation coverage and amount of soil moisture play a dominant role in the radiative as well as climatic properties.
Keywords : landcover change, SEBAL, landsat, NDVI, land surface albedo